Tirzepatide: Clinical review of the twincretin injectable
Abstract
PURPOSE: To provide an overview of the safety and efficacy, pharmacology, dosing, place in therapy, and clinical trials for tirzepatide, a novel glucagon-like peptide 1 (GLP-1) and glucose-dependent insulinotropic polypeptide (GIP) agonist for treatment of type 2 diabetes. SUMMARY: Diabetes is a chronic disease state with a high burden on healthcare spending and patient quality of life. Incretin-influencing agents such as GLP-1 receptor agonists have gained favor as diabetes therapeutic options due to their impact on multiple glycemic factors as well as resulting weight loss and cardiovascular benefits. Tirzepatide was approved in 2022 for the management of type 2 diabetes and utilizes GLP-1 receptor agonism along with GIP agonism to simultaneously address 2 incretin pathways. Thus far, the SURPASS and SURMOUNT trials, for which findings have been published, have shown great efficacy of tirzepatide in glycosylated hemoglobin and weight reduction in multiple subgroup populations with and without diabetes. Tirzepatide has similar gastrointestinal adverse reactions and contraindications as traditional GLP-1 receptor agonists. CONCLUSION: Tirzepatide is a novel agent on the market for type 2 diabetes management that offers targeting of a familiar pathway along with the new GIP pathway to address glycemic control in patients with diabetes. Tirzepatide is approved for use in patients with diabetes and may serve as a strong option for patients requiring improved glycemic and weight control.
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Claims the paper makes
23 of 97 cited sources checked · 14 supported · 0 flagged · accuracy not yet measured
- Premisecitation
GIP receptor agonists have beneficial effects on weight loss in rodent studies.
“GIP receptor agonists have not yet been studied as a single-mechanism agent in humans but have been shown to have beneficial effects on weight loss in rodent studies.13,14”
Quote in the paperSubstantial claim2 of 2 sources checked - Premisecitation
The SUSTAIN-6 trial demonstrated that semaglutide reduced cardiovascular risk compared to placebo.
“The SUSTAIN-6 trial is another example in which semaglutide was compared to placebo and was demonstrated to result in reduced cardiovascular risk.8”
Quote in the paperNot a substantial claim1 of 1 sources checked- cites [8] Marso, 2016, Semaglutide and cardiovascular outcomes in patients with type 2 diabetes, N Engl J Med source
- Premisecitation
The LEADER trial demonstrated that liraglutide reduced cardiovascular risk.
“Liraglutide was also demonstrated to reduce cardiovascular risk in the LEADER trial.9”
Quote in the paperNot a substantial claim1 of 1 sources checked- cites [9] Marso, 2016, Liraglutide and cardiovascular outcomes in type 2 diabetes, N Engl J Med source
- Premisecitation
Recent research has demonstrated that it is possible to reverse GIP resistance.
“recent research has demonstrated that it is possible to reverse GIP resistance.”
Quote in the paperSubstantial claim2 of 2 sources checked- cites [18] Fisman, 2021, The dual glucose-dependent insulinotropic polypeptide (GIP) and glucagon-like peptide-1 (GLP-1) receptor agonist tirzepatide: a novel cardiometabolic therapeutic prospect, Cardiovasc Diabetol source
- cites [19] Kim, 2008, The role of incretins in glucose homeostasis and diabetes treatment, Pharmacol Rev source
- Premisecitation
SGLT-2 inhibitors have benefits in patients with heart failure and chronic kidney disease, regardless of the presence of diabetes.
“Clinical trials, such as EMPEROR-REDUCED (empagliflozin) and DAPA-CKD (dapagliflozin), have shown that SGLT-2 inhibitors have benefits in patients with heart failure and chronic kidney disease, regardless of the presence of diabetes.38,39”
Quote in the paperNot a substantial claim2 of 2 sources checked
- Interpretationcitation
The incidence of GI adverse effects with tirzepatide appears similar to the GI adverse effects reported with GLP-1 receptor agonists.
“The incidence of GI adverse effects with tirzepatide appears to be similar to the GI adverse effects reported by patients in clinical trials for GLP-1 receptor agonists.”
Quote in the paperNot a substantial claim1 of 2 sources checked- cites [35] Frías, 2021, Efficacy and safety of once-weekly semaglutide 2.0 mg versus 1.0 mg in patients with type 2 diabetes (SUSTAIN FORTE): a double-blind, randomised, phase 3B trial, Lancet Diabetes Endocrinol source
- cites [36] Frias, 2021, Efficacy and safety of dulaglutide 3.0 mg and 4.5 mg versus dulaglutide 1.5 mg in metformin-treated patients with type 2 diabetes in a randomized controlled trial (AWARD-11), Diabetes Care source
The Results > Safety section (Table 2; page not provided) reports gastrointestinal adverse-effect rates for dulaglutide, a GLP-1 receptor agonist. The paper does not report tirzepatide adverse-effect rates or compare them with dulaglutide, so it supports the GLP-1 comparator data but not the claimed similarity. (LLM, conf=0.88)
Experimental — accuracy not yet measured
- Premisecitation
The lowest studied dose of tirzepatide, 5 mg, results in equivalent weight reduction as the highest doses of its GLP-1 receptor agonist relatives currently approved by FDA for treatment of obesity.
“It is important to note that the lowest studied dose of tirzepatide, 5 mg, has been demonstrated to result in equivalent weight reduction as the highest doses of its GLP-1 receptor agonist relatives that are currently approved by FDA for treatment of obesity (Table 2).27,45”
Quote in the paperSubstantial claim1 of 2 sources checked- cites [27] Jastreboff, 2022, Tirzepatide once weekly for the treatment of obesity, N Engl J Med source
- cites [45] Rubino, 2022, Effect of weekly subcutaneous semaglutide vs daily liraglutide on body weight in adults with overweight or obesity without diabetes: the STEP 8 randomized clinical trial, JAMA source
The Introduction identifies semaglutide 2.4 mg and liraglutide 3.0 mg as GLP-1 receptor agonists approved for weight management. The Primary Outcome section reports weight reductions with those drugs, but this trial did not study tirzepatide 5 mg or establish that its weight reduction was equivalent to theirs. Page numbers are unavailable in our copy. (LLM, conf=0.86)
Experimental — accuracy not yet measured
- Premisecitation
In patients with diabetes already taking insulin glargine, addition of tirzepatide 10 and 15 mg reduced HbA1c more than placebo at week 40.
“Compared to an HbA 1c reduction of -0.86% in the placebo group, the 10-mg group had an HbA 1c reduction of -2.40% (-1.53% difference; 97.5% CI, -1.80% to -1.27%), and the 15-mg group had a reduction of -2.34% (-1.47% difference; 97.5% CI, -1.75% to -1.20%).25”
Quote in the paperSubstantial claim1 of 1 sources checked- cites [25] Dahl, 2022, Effect of subcutaneous tirzepatide vs placebo added to titrated insulin glargine on glycemic control in patients with type 2 diabetes: the SURPASS-5 randomized clinical trial, JAMA source
- Premisecitation
Several medications in the SGLT-2 inhibitor and GLP-1 receptor agonist drug classes have been demonstrated to have cardiovascular and renal benefits for patients.
“As previously discussed, several medications in the SGLT-2 inhibitor and GLP-1 receptor agonist drug classes have been demonstrated to have cardiovascular and renal benefits for patients.[7][8][9][37][38][39]”
Quote in the paperSubstantial claim2 of 3 sources checked- cites [7] Gerstein, 2019, Dulaglutide and cardiovascular outcomes in type 2 diabetes (REWIND): a double-blind, randomised placebo-controlled trial, Lancet source
- cites [8] Marso, 2016, Semaglutide and cardiovascular outcomes in patients with type 2 diabetes, N Engl J Med source
- cites [9] Marso, 2016, Liraglutide and cardiovascular outcomes in type 2 diabetes, N Engl J Med source
- Premisecitation
Certain GLP-1 receptor agonists are superior to placebo in reducing the risk of MACE.
“Similarly, previously mentioned clinical trials have demonstrated superiority of certain GLP-1 receptor agonists to placebo in reducing the risk of MACE.[7][8][9]”
Quote in the paperNot a substantial claim2 of 3 sources checked- cites [7] Gerstein, 2019, Dulaglutide and cardiovascular outcomes in type 2 diabetes (REWIND): a double-blind, randomised placebo-controlled trial, Lancet source
- cites [8] Marso, 2016, Semaglutide and cardiovascular outcomes in patients with type 2 diabetes, N Engl J Med source
- cites [9] Marso, 2016, Liraglutide and cardiovascular outcomes in type 2 diabetes, N Engl J Med source
- Premisecitation
The available literature on pharmacoeconomic studies of GLP-1 receptor agonists is conflicting.
“While some pharmacoeconomic studies are available on GLP-1 receptor agonists, the available literature is conflicting and further studies with better economic modeling for data analysis are required.[47][48][49]”
Quote in the paperSubstantial claim2 of 3 sources checked- cites [47] Ruan, 2021, The cost-effectiveness of once-weekly semaglutide compared with other GLP-1 receptor agonists in type 2 diabetes: a systematic literature review, Expert Rev Pharmacoecon Outcomes Res source
- cites [48] Yang, 2021, Cost-effectiveness of GLP-1 receptor agonists versus insulin for the treatment of type 2 diabetes: a real-world study and systematic review, Cardiovasc Diabetol source
The Results (Systematic review; page unavailable) report varied cost-effectiveness estimates, including cases in which GLP-1 receptor agonists were dominated by insulin. But the review concludes that they were cost-effective overall, so describing the literature as conflicting overstates what this source says. (LLM, conf=0.82)
Experimental — accuracy not yet measured - cites [49] Choi, 2022, First-line therapy for type 2 diabetes with sodium-glucose cotransporter-2 inhibitors and glucagon-like peptide-1 receptor agonists: a cost-effectiveness study, Ann Intern Med source
The paper discusses existing GLP-1 receptor agonist cost-effectiveness studies and, in the Discussion (page not available), distinguishes its first-line analysis from studies of other treatment strategies. It reports that an earlier evaluation found add-on therapy cost-effective while its own first-line analysis did not, but it does not characterize the literature as conflicting or call for further studies with better economic modeling. (LLM, conf=0.76)
Experimental — accuracy not yet measured
- Interpretationreasoning
Tirzepatide offers targeting of the familiar GLP-1 pathway along with the new GIP pathway to address glycemic control in patients with diabetes.
“Tirzepatide is a novel agent on the market for type 2 diabetes management that offers targeting of a familiar pathway along with the new GIP pathway to address glycemic control in patients with diabetes.”
Quote in the paperSubstantial claim - Interpretationnone given
The SURPASS and SURMOUNT trials have shown efficacy of tirzepatide in reducing HbA1c and weight in multiple subgroup populations with and without diabetes.
“Thus far, the SURPASS and SURMOUNT trials, for which findings have been published, have shown great efficacy of tirzepatide in glycosylated hemoglobin and weight reduction in multiple subgroup populations with and without diabetes.”
Quote in the paperSubstantial claim - Premisecitation
Tirzepatide is a dual GLP-1 receptor agonist and GIP receptor agonist.
“utilizes GLP-1 receptor agonism along with GIP agonism to simultaneously address 2 incretin pathways.”
- Also stated in: § Pharmacology · plain
“As previously mentioned, tirzepatide is classified as a dual GLP-1 receptor agonist and GIP receptor agonist.”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [12] 2022, Tirzepatide.
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
- Also stated in: § Pharmacology · plain
- Premisecitation
SURPASS-2 showed that weight reduction was greater for tirzepatide than semaglutide.
“Weight reduction was also greater for tirzepatide, with leastsquares mean estimated treatment differences of -1.9 kg, -3.6 kg, and -5.5 kg at the 3 doses compared to semaglutide and a P value of less than 0.001 for each comparison.22”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [22] Frías, 2021, Tirzepatide versus semaglutide once weekly in patients with type 2 diabetes, N Engl J Med source
- Premisecitation
Tirzepatide bioavailability and absorption are similar with administration in the arm, thigh, or abdomen.
“This bioavailability and level of absorption are similar with administration in the arm, thigh, or abdomen.12,20”
Quote in the paperNot a substantial claim0 of 2 sources checked- cites [12] 2022, Tirzepatide.
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
- cites [20] 2022
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
- Premisecitation
The elimination half-life of tirzepatide is approximately 5 days.
“The elimination half-life of tirzepatide is approximately 5 days, which is why the medication is available for a once-weekly administration schedule.”
Quote in the paperSubstantial claim0 of 2 sources checked- cites [12] 2022, Tirzepatide.
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
- cites [20] 2022
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
- Premisecitation
The AWARD-7 trial showed that the kidney-related benefits of dulaglutide can last for up to 1 year after treatment initiation.
“the AWARD-7 trial showed that the kidney-related benefits of dulaglutide can last for up to 1 year after treatment initiation”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [6] Tuttle, 2018, Dulaglutide versus insulin glargine in patients with type 2 diabetes and moderate-to-severe chronic kidney disease (AWARD-7): a multicentre, open-label, randomised trial, Lancet Diabetes Endocrinol source
- Premisecitation
Semaglutide, dulaglutide, and liraglutide are superior to placebo in decreasing the risk of major adverse cardiovascular events.
“Semaglutide, dulaglutide, and liraglutide are the 3 GLP-1 receptor agonists that have been demonstrated thus far to be superior to placebo in decreasing the risk of major adverse cardiovascular events (MACE)”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [7][8][9]
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
- Premisecitation
Tirzepatide has overall albumin binding of 99%.
“The volume of distribution for tirzepatide in patients with T2DM is approximately 10.3 L with overall albumin binding of 99%, partially resultant to the diacid moiety.”
Quote in the paperNot a substantial claim0 of 2 sources checked- cites [12] 2022, Tirzepatide.
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
- cites [20] 2022
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
- Premisecitation
SURPASS-1 showed that tirzepatide produced weight loss ranging from 7 to 9.5 kg in a dose-dependent manner.
“Tirzepatide was also shown in this trial to produce weight loss ranging from 7 to 9.5 kg in a dose-dependent manner.21”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [21] Rosenstock, 2021, Efficacy and safety of a novel dual GIP and GLP-1 receptor agonist tirzepatide in patients with type 2 diabetes (SURPASS-1): a double-blind, randomised, phase 3 trial, Lancet source
- Premisecitation
The volume of distribution for tirzepatide in patients with T2DM is approximately 10.3 L.
“The volume of distribution for tirzepatide in patients with T2DM is approximately 10.3 L with overall albumin binding of 99%, partially resultant to the diacid moiety.”
Quote in the paperNot a substantial claim0 of 2 sources checked- cites [12] 2022, Tirzepatide.
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
- cites [20] 2022
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
- Premisecitation
The bioavailability of tirzepatide is approximately 80%.
“The bioavailability of this medication is approximately 80%.”
Quote in the paperNot a substantial claim0 of 2 sources checked- cites [12] 2022, Tirzepatide.
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
- cites [20] 2022
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
- Premisecitation
Tirzepatide exposure increases dose proportionally.
“Tirzepatide takes approximately 4 weeks to reach steady-state levels, and exposure increases dose proportionally.”
Quote in the paperNot a substantial claim0 of 2 sources checked- cites [12] 2022, Tirzepatide.
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
- cites [20] 2022
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
- Premisecitation
In drug-naive patients with T2DM, tirzepatide was superior to placebo in mean change in HbA1c at 40 weeks at all 3 doses.
“Tirzepatide was superior to placebo in the primary endpoint, mean change in glycosylated hemoglobin (HbA 1c ) at 40 weeks from baseline, at all 3 doses included.”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [21] Rosenstock, 2021, Efficacy and safety of a novel dual GIP and GLP-1 receptor agonist tirzepatide in patients with type 2 diabetes (SURPASS-1): a double-blind, randomised, phase 3 trial, Lancet source
- Premisecitation
Maximum plasma concentrations of tirzepatide are reached within 8 to 72 hours of subcutaneous administration.
“Maximum plasma concentrations are reached within 8 to 72 hours of subcutaneous administration.”
Quote in the paperNot a substantial claim0 of 2 sources checked- cites [12] 2022, Tirzepatide.
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
- cites [20] 2022
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
- Interpretationreasoning
Tirzepatide is available for once-weekly administration because of its approximately 5-day elimination half-life.
“The elimination half-life of tirzepatide is approximately 5 days, which is why the medication is available for a once-weekly administration schedule.”
Quote in the paperSubstantial claim - Premisecitation
GLP-1 maintains its function in patients with T2DM despite being limited in quantity.
“GLP-1, while limited in quantity, still maintains its function in patients with T2DM.”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [15] Holst, 2004, Role of incretin hormones in the regulation of insulin secretion in diabetic and nondiabetic humans, Am J Physiol Endocrinol Metab source
- Premisecitation
In patients with T2DM inadequately controlled on metformin monotherapy, tirzepatide decreased HbA1c more than semaglutide 1 mg.
“Tirzepatide decreased HbA 1c by 2.01%, 2.24%, and 2.30%, respectively, compared to a 1.86% decrease in the comparator group.”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [22] Frías, 2021, Tirzepatide versus semaglutide once weekly in patients with type 2 diabetes, N Engl J Med source
- Premisecitation
Tirzepatide takes approximately 4 weeks to reach steady-state levels.
“Tirzepatide takes approximately 4 weeks to reach steady-state levels, and exposure increases dose proportionally.”
Quote in the paperNot a substantial claim0 of 2 sources checked- cites [12] 2022, Tirzepatide.
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
- cites [20] 2022
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
- Premisecitation
GIP function is significantly reduced in patients with T2DM even though it remains in adequate supply.
“The opposite is true for GIP, the main incretin hormone in healthy adults, as its function is significantly reduced even though it remains in adequate supply.15”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [15] Holst, 2004, Role of incretin hormones in the regulation of insulin secretion in diabetic and nondiabetic humans, Am J Physiol Endocrinol Metab source
- Premisecitation
Mean clearance of tirzepatide in patients with diabetes is 0.061 L/h.
“Mean clearance in patients with diabetes is 0.061 L/h.”
Quote in the paperNot a substantial claim0 of 2 sources checked- cites [12] 2022, Tirzepatide.
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
- cites [20] 2022
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
- Interpretationcitation
The dual GLP-1/GIP mechanism of tirzepatide allows enhanced and synergistic treatment of type 2 diabetes.
“Tirzepatide blends the mechanism of the already available GLP-1 receptor agonists with the novel mechanism of glucose-dependent insulinotropic polypeptide (GIP) agonism in the body to create a dual-mechanism product that allows for enhanced and synergistic treatment of type 2 diabetes.12”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [12] 2022, Tirzepatide.
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
- Premisecitation
A meta-analysis of 9 RCTs reported pooled GI adverse effect rates ranging from 23% with the 5-mg dose to 36% with the 15-mg dose.
“A meta-analysis of 9 RCTs evaluating the safety and efficacy of tirzepatide reported lower incidence rates, with pooled GI adverse effect rates ranging from 23% with the 5-mg dose to 36% with the 15-mg dose.34”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [34] Permana, 2022, Efficacy and safety of tirzepatide as novel treatment for type 2 diabetes: a systematic review and meta-analysis of randomized clinical trials, Diabetes Metab Syndr source
- Premisecitation
The incidence of GI adverse effects with tirzepatide is comparable to that of the GLP-1 receptor agonist drug class as a whole.
“the incidence of GI adverse effects with tirzepatide is comparable to that of the GLP-1 receptor agonist drug class as a whole”
Quote in the paperSubstantial claim0 of 3 sources checked- cites [20] 2022
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
- cites [21] Rosenstock, 2021, Efficacy and safety of a novel dual GIP and GLP-1 receptor agonist tirzepatide in patients with type 2 diabetes (SURPASS-1): a double-blind, randomised, phase 3 trial, Lancet source
- cites [22] Frías, 2021, Tirzepatide versus semaglutide once weekly in patients with type 2 diabetes, N Engl J Med source
- Interpretationcitation
Payor coverage for tirzepatide will likely be a barrier to patient use, especially before tirzepatide has been officially recognized as a standard of care in professional guidelines.
“While the drug manufacturer is currently offering a savings card program for some patients for whom pricing is a barrier, payor coverage for tirzepatide will likely be a barrier to patient use, especially before tirzepatide has been officially recognized as a standard of care in professional guidelines. 2”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [2] American Diabetes Association, 2021, 6. Glycemic targets: Standards of Medical Care in Diabetes-2021, Diabetes Care source
- Rests on an assumption: Many payor plans either exclude tirzepatide or require prior authorization to encourage use of GLP-1 receptor agonists before tirzepatide.
- Premisecitation
Pooled results from SURPASS-1 and SURPASS-2 per the manufacturer showed a higher incidence of GI adverse effects with tirzepatide than with placebo.
“Pooled results from SURPASS-1 and SURPASS-2 per the manufacturer showed a higher incidence of GI adverse effects with tirzepatide than with placebo”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [20] 2022
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
- Premisecitation
The incidence of GI adverse effects with the highest dose of tirzepatide exceeds 40%.
“Nevertheless, with the incidence of the GI adverse effect profile exceeding 40% with the highest dose”
Quote in the paperSubstantial claim0 of 3 sources checked- cites [20] 2022
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
- cites [21] Rosenstock, 2021, Efficacy and safety of a novel dual GIP and GLP-1 receptor agonist tirzepatide in patients with type 2 diabetes (SURPASS-1): a double-blind, randomised, phase 3 trial, Lancet source
- cites [22] Frías, 2021, Tirzepatide versus semaglutide once weekly in patients with type 2 diabetes, N Engl J Med source
- Premisenone given
Weight loss benefits of tirzepatide have been demonstrated in patients with and without diabetes.
“Weight loss benefits have been demonstrated in patients with and without diabetes.”
Quote in the paperSubstantial claim - Premisecitation
In the STEP-8 trial, semaglutide resulted in a significantly greater average reduction in body weight of 15.8% compared to a reduction of 6.4% with liraglutide.
“Semaglutide resulted in a significantly greater average reduction in body weight of 15.8% compared to a reduction of 6.4% with liraglutide.33”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [33]
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
- Premisecitation
In patients with obesity or overweight with comorbidities and without diabetes, tirzepatide 5, 10, and 15 mg reduced weight more than placebo at 72 weeks.
“The placebo group had an average weight reduction of -3.1% from baseline at 72 weeks compared to a reduction of -15% in the 5-mg tirzepatide group (95% CI, -15.9% to -14.2%), -19.5% in the 10-mg group (95% CI, -20.4% to -18.5%), and -20.9% (95% CI, -21.8% to -19.9%).”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [27] Jastreboff, 2022, Tirzepatide once weekly for the treatment of obesity, N Engl J Med source
- Premiseown data
The weight loss seen with tirzepatide is significantly more than what has been seen in other weight loss trials for GLP-1 receptor agonists.
“This weight loss is significantly more than what has been seen in other weight loss trials for GLP-1 receptor agonists.”
Quote in the paperSubstantial claim - Premisecitation
When used alone without add-on insulin therapy, tirzepatide did not have any reported hypoglycemia adverse reactions.
“When utilized alone without add-on insulin therapy, tirzepatide did not have any reported hypoglycemia adverse reactions.”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [20] 2022
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
- Premisecitation
SURPASS-4 showed that superiority was achieved for both tirzepatide 10 and 15 mg doses.
“Superiority was also achieved for both doses (P < 0.0001).24”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [24] Del Prato, 2021, Tirzepatide versus insulin glargine in type 2 diabetes and increased cardiovascular risk (SURPASS-4): a randomised, open-label, parallel-group, multicentre, phase 3 trial, Lancet source
- Interpretationown data
Tirzepatide has a slightly higher cost on the front end compared to other GLP-1 receptor agonists.
“This highlights a slightly higher cost on the front end.”
Quote in the paperNot a substantial claim - Interpretationreasoning
Tirzepatide appears to be a potent medication with a strong impact on glycemic and weight control, based on available evidence at the time of writing.
“On the basis of the available evidence at the time of this writing, tirzepatide appears to be a potent medication with a strong impact on glycemic and weight control.”
Quote in the paperSubstantial claim - Premisecitation
More patients dropped out of clinical trials due to GI adverse effects with tirzepatide than with placebo.
“Similarly, more patients at a rate of 3%, 5.4%, and 6.6% in the same dosing order dropped out of clinical trials due to GI adverse effects, compared to a rate of 0.4% in the placebo group.”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [20] 2022
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
- Premisecitation
In SURPASS-4, the estimated treatment difference in HbA1c reduction between tirzepatide and insulin glargine ranged from -0.99% to -1.14%.
“Clinical significance may be higher when comparing tirzepatide to other treatments for type 2 diabetes such as insulin glargine, with an estimated treatment difference in HbA 1c reduction ranging from -0.99% to -1.14% in SURPASS-4.22,24”
Quote in the paperSubstantial claim0 of 2 sources checked- cites [22] Frías, 2021, Tirzepatide versus semaglutide once weekly in patients with type 2 diabetes, N Engl J Med source
- cites [24] Del Prato, 2021, Tirzepatide versus insulin glargine in type 2 diabetes and increased cardiovascular risk (SURPASS-4): a randomised, open-label, parallel-group, multicentre, phase 3 trial, Lancet source
- Premisecitation
The incidence of GI adverse effects with tirzepatide is reportedly less than with certain GLP-1 receptor agonists such as dulaglutide.
“and is reportedly less than with certain GLP-1 receptor agonists such as dulaglutide.[20][21][22][23][24][25]27”
Quote in the paperNot a substantial claim0 of 3 sources checked- cites [20] 2022
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
- cites [21] Rosenstock, 2021, Efficacy and safety of a novel dual GIP and GLP-1 receptor agonist tirzepatide in patients with type 2 diabetes (SURPASS-1): a double-blind, randomised, phase 3 trial, Lancet source
- cites [22] Frías, 2021, Tirzepatide versus semaglutide once weekly in patients with type 2 diabetes, N Engl J Med source
- Premisecitation
In several clinical trials, the incidence of GI effects decreased over time, with the highest effects seen during treatment initiation or dose escalation.
“Of note, in several of the clinical trials, the incidence of GI effects decreased over time, with the highest effects seen during treatment initiation or dose escalation.[21][22][23][24][25]”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [21][22][23][24][25]
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
- Premisenone given
There is a lack of data at this point regarding cardiorenal benefits of tirzepatide.
“For example, one major consideration is the lack of data at this point regarding cardiorenal benefits.”
Quote in the paperSubstantial claim - Premisecitation
When tirzepatide was used with basal insulin or a sulfonylurea, hypoglycemia occurred more frequently.
“However, when tirzepatide was used with basal insulin or a sulfonylurea, hypoglycemia occurred more frequently.”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [20] 2022
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
- Interpretationreasoning
The demonstrated impact of tirzepatide on glycemic control and weight loss has created the opportunity for tirzepatide to be a strong option in both therapeutic spaces.
“While further research is pending to determine the cardiorenal benefits of tirzepatide, the demonstrated impact on glycemic control and on weight loss has created the opportunity for tirzepatide to be a strong option in both of these therapeutic spaces.”
Quote in the paperSubstantial claim
- May combine two claims. 18
- Classified as probably not a substantial claim. 3
- The quote only partly states this claim. 2
May combine two claims.
PremisecitationGLP-1 receptor agonists have significant benefits in weight reduction and can lower the risk of major cardiovascular events, all-cause mortality, hospital admission for heart failure, and worsening kidney function.
“GLP-1 receptor agonists have been demonstrated to have significant benefits in weight reduction and can also lower the risk of major cardiovascular events, all-cause mortality, hospital admission for heart failure, and worsening kidney function.4,5”
Quote in the paperSubstantial claim2 of 2 sources checked- cites [4] Sattar, 2021, Cardiovascular, mortality, and kidney outcomes with GLP-1 receptor agonists in patients with type 2 diabetes: a systematic review and meta-analysis of randomised trials, Lancet Diabetes Endocrinol source
The Added value of this study and Results sections (pages not given) report reduced major cardiovascular events, all-cause mortality, heart-failure hospitalisation, and a composite kidney outcome in patients with type 2 diabetes. The Introduction says GLP-1 receptor agonists “variably lower weight,” but does not establish the claimed significant weight-reduction benefit. The narrower worsening-kidney-function outcome became nominally significant only in a sensitivity analysis excluding ELIXA. (LLM, conf=0.86)
Experimental — accuracy not yet measured - cites [5] Lazzaroni, 2021, Anti-diabetic drugs and weight loss in patients with type 2 diabetes, Pharmacol Res source
The Conclusions (page unavailable) identify GLP-1 receptor agonists as the anti-diabetic drug class with the greatest weight-reduction benefit. A passage in Additional information (page unavailable) also describes reduced cardiovascular risk and mortality, but the copy does not establish the specific claims about major cardiovascular events, all-cause mortality, heart-failure admissions, or worsening kidney function. (LLM, conf=0.87)
Experimental — accuracy not yet measured
May combine two claims.
PremisecitationGLP-1 suppresses glucagon secretion and has extrahepatic effects such as slowing gastric emptying and suppressing appetite signaling in the brain.
“GLP-1 suppresses glucagon secretion and has extrahepatic effects such as slowing gastric emptying and suppressing appetite signaling in the brain.16,17”
Quote in the paperSubstantial claim1 of 2 sources checked- cites [16] Edholm, 2010, Differential incretin effects of GIP and GLP-1 on gastric emptying, appetite, and insulin-glucose homeostasis, Neurogastroenterol Motil source
The Discussion reports that GLP-1 slowed gastric emptying and that the delay reduced plasma pancreatic glucagon levels; it does not establish direct suppression of glucagon secretion. It also reports reduced hunger and desire to eat, but explicitly says the study cannot determine whether these effects involve the central nervous system. Page numbers are not available in our copy. (LLM, conf=0.88)
Experimental — accuracy not yet measured - cites [17] Nauck, 2021, The evolving story of incretins (GIP and GLP-1) in metabolic and cardiovascular disease: a pathophysiological update, Diabetes Obes Metab source
May combine two claims.
InterpretationcitationReversing GIP resistance while enhancing GLP-1 effects is thought to bolster the incretin effect more than GLP-1 receptor agonism alone and create synergistic effects on glucose control.
“Reversing GIP resistance while simultaneously enhancing the effects of GLP-1 is thought to bolster the previously described incretin effect even more than GLP-1 receptor agonism alone and create synergistic effects on glucose control”
Quote in the paperSubstantial claim2 of 2 sources checked- cites [18] Fisman, 2021, The dual glucose-dependent insulinotropic polypeptide (GIP) and glucagon-like peptide-1 (GLP-1) receptor agonist tirzepatide: a novel cardiometabolic therapeutic prospect, Cardiovasc Diabetol source
- cites [19] Kim, 2008, The role of incretins in glucose homeostasis and diabetes treatment, Pharmacol Rev source
Section V.B reports additive effects of GLP-1 and GIP on insulin secretion in β-cell lines, but only at submaximal concentrations. Section VI.A raises the possibility that stimulating both receptors might benefit people with type 2 diabetes. Neither passage establishes that reversing GIP resistance produces synergistic glucose control or improves the incretin effect more than GLP-1 receptor agonism alone; page numbers are unavailable in our copy. (LLM, conf=0.86)
Experimental — accuracy not yet measured
May combine two claims.
PremisecitationGIP minimizes insulin resistance by preventing excess storage of lipids and increasing the sensitivity of adipose tissue to insulin.
“GIP also has beneficial effects such as minimizing insulin resistance by preventing excess storage of lipids and increasing the sensitivity of adipose tissue to insulin.18”
Quote in the paperNot a substantial claim1 of 1 sources checked- cites [18] Fisman, 2021, The dual glucose-dependent insulinotropic polypeptide (GIP) and glucagon-like peptide-1 (GLP-1) receptor agonist tirzepatide: a novel cardiometabolic therapeutic prospect, Cardiovasc Diabetol source
The ‘Effects on lipid profile’ section (page unavailable) reports improved insulin sensitivity with tirzepatide, a dual GIP/GLP-1 receptor agonist. It does not attribute that improvement to GIP alone or say that GIP prevents excess lipid storage or increases adipose-tissue insulin sensitivity. The Background instead describes GIP activity as mainly pancreatic. (LLM, conf=0.78)
Experimental — accuracy not yet measured
May combine two claims.
InterpretationcitationTirzepatide has similar gastrointestinal adverse reactions and contraindications as traditional GLP-1 receptor agonists.
“Tirzepatide has similar gastrointestinal adverse reactions and contraindications as traditional GLP-1 receptor agonists.”
- Also stated in: § Safety profile · hedged
“The incidence of GI adverse effects with tirzepatide appears to be similar to the GI adverse effects reported by patients in clinical trials for GLP-1 receptor agonists.”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [20] 2022
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
- Also stated in: § Safety profile · hedged
Probably not a substantial claim: may not pass S3 (load-bearing).
PremisecitationThe REWIND trial highlighted the cardiovascular benefits of dulaglutide over multiple years.
“the REWIND trial highlighted the cardiovascular benefits of dulaglutide over multiple years.6,7”
Quote in the paperNot a substantial claim0 of 2 sources checked- cites [6] Tuttle, 2018, Dulaglutide versus insulin glargine in patients with type 2 diabetes and moderate-to-severe chronic kidney disease (AWARD-7): a multicentre, open-label, randomised trial, Lancet Diabetes Endocrinol source
- cites [7] Gerstein, 2019, Dulaglutide and cardiovascular outcomes in type 2 diabetes (REWIND): a double-blind, randomised placebo-controlled trial, Lancet source
May combine two claims.
PremisecitationTirzepatide is excreted in the urine and feces but only as metabolites.
“Tirzepatide is excreted in the urine and feces but is only excreted as metabolites.12,20”
Quote in the paperNot a substantial claim0 of 2 sources checked- cites [12] 2022, Tirzepatide.
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
- cites [20] 2022
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
Probably not a substantial claim: may not pass S3 (load-bearing).
PremisecitationThe incretin effect is thought to be responsible for up to two-thirds of insulin release in response to a meal.
“The incretin effect is thought to be responsible for up to two-thirds of insulin release in response to a meal.15”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [15] Holst, 2004, Role of incretin hormones in the regulation of insulin secretion in diabetic and nondiabetic humans, Am J Physiol Endocrinol Metab source
May combine two claims.
PremisecitationIn patients with T2DM, production of GLP-1 is reduced while GIP levels remain steady.
“In patients with type 2 diabetes mellitus (T2DM), production of GLP-1 is reduced while GIP levels remain steady.”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [15] Holst, 2004, Role of incretin hormones in the regulation of insulin secretion in diabetic and nondiabetic humans, Am J Physiol Endocrinol Metab source
May combine two claims.
PremisecitationSURPASS-3 showed that the risk of hypoglycemia was lower with tirzepatide, but a substantially higher frequency of GI adverse effects was observed.
“The risk of hypoglycemia was lower with tirzepatide, but a substantially higher frequency of GI adverse effects was observed”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [23] Ludvik, 2021, Once-weekly tirzepatide versus once-daily insulin degludec as add-on to metformin with or without SGLT-2 inhibitors in patients with type 2 diabetes (SURPASS-3): a randomised, open-label, parallel-group, phase 3 trial, Lancet source
May combine two claims.
PremisecitationSURPASS-3 showed that all 3 doses of tirzepatide decreased body weight compared to insulin degludec, which led to an average increase in body weight of 2.3 kg.
“Ranging from -7.5 kg to -12.9 kg, all 3 doses of tirzepatide decreased body weight compared to insulin degludec, which led to an average increase in body weight of 2.3 kg.”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [23] Ludvik, 2021, Once-weekly tirzepatide versus once-daily insulin degludec as add-on to metformin with or without SGLT-2 inhibitors in patients with type 2 diabetes (SURPASS-3): a randomised, open-label, parallel-group, phase 3 trial, Lancet source
The quote only partly states this claim.
PremisecitationIn patients with uncontrolled diabetes on metformin with or without SGLT-2 inhibitor, tirzepatide 10 and 15 mg were noninferior to insulin degludec for mean change from baseline HbA1c at 52 weeks.
“The primary endpoint for this study was noninferiority to insulin degludec for the 10-and 15-mg doses of tirzepatide, specifically with respect to the mean change from baseline HbA 1c at 52 weeks.23”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [23] Ludvik, 2021, Once-weekly tirzepatide versus once-daily insulin degludec as add-on to metformin with or without SGLT-2 inhibitors in patients with type 2 diabetes (SURPASS-3): a randomised, open-label, parallel-group, phase 3 trial, Lancet source
May combine two claims.
PremisecitationThe incidence of GI adverse effects with tirzepatide is high, especially compared to SGLT-2 inhibitors.
“While the incidence of GI adverse effects is high, especially when compared to other diabetes medications such as the generally well-tolerated SGLT-2 inhibitors”
Quote in the paperSubstantial claim0 of 3 sources checked- cites [20] 2022
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
- cites [21] Rosenstock, 2021, Efficacy and safety of a novel dual GIP and GLP-1 receptor agonist tirzepatide in patients with type 2 diabetes (SURPASS-1): a double-blind, randomised, phase 3 trial, Lancet source
- cites [22] Frías, 2021, Tirzepatide versus semaglutide once weekly in patients with type 2 diabetes, N Engl J Med source
May combine two claims.
PremisecitationSURMOUNT-1 showed that weight reduction of 5% or more occurred in 35% of placebo patients versus 85%, 89%, and 91% of patients receiving tirzepatide 5, 10, and 15 mg.
“the placebo group had a weight reduction of 5% or more in only 35% of patients (95% CI, 30% to 39%), and while each respective dosing group of tirzepatide (5, 10, and 15 mg) had a weight reduction of at least 5% in 85% (95% CI, 82% to 89%), 89% (95% CI, 86% to 92%), and 91% (95% CI, 88% to 94%) of patients.”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [27] Jastreboff, 2022, Tirzepatide once weekly for the treatment of obesity, N Engl J Med source
May combine two claims.
PremisecitationThe wholesale acquisition cost (WAC) and average wholesale price (AWP) of tirzepatide, as listed in Redbook, are currently $974.33 and $1,169.20, respectively.
“The medication's wholesale acquisition cost (WAC) and average wholesale price (AWP), as listed in Redbook, are currently $974.33 and $1,169.20,respectively.”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites Redbook
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
May combine two claims.
PremisecitationIn SURMOUNT-1, patients experienced weight reduction of -15% in the 5-mg tirzepatide group, -19.5% in the 10-mg group, and -20.9% in the 15-mg group.
“As noted above for SURMOUNT-1, patients experienced weight reduction of -15% in the 5-mg tirzepatide group, -19.5% in the 10-mg group, and -20.9% in the 15-mg group.27”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [27] Jastreboff, 2022, Tirzepatide once weekly for the treatment of obesity, N Engl J Med source
May combine two claims.
Premisenone givenTirzepatide is superior to metformin monotherapy, a GLP-1 receptor agonist, and two different basal insulins in HbA1c and weight reduction.
“The medication has been shown to be superior in the areas of HbA 1c and weight reduction when compared to many standards of therapy in diabetes care such as metformin monotherapy, a GLP-1 receptor agonist, and 2 different basal insulins.”
Quote in the paperSubstantial claimThe quote only partly states this claim.
PremisecitationIn patients with increased cardiovascular risk on metformin with or without sulfonylurea or SGLT-2 inhibitor, tirzepatide 10 and 15 mg were noninferior to insulin glargine for HbA1c change at 52 weeks.
“The primary endpoint was once again noninferiority for the 2 highest doses of tirzepatide compared to insulin glargine when considering HbA 1c change at 52 weeks.”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [24] Del Prato, 2021, Tirzepatide versus insulin glargine in type 2 diabetes and increased cardiovascular risk (SURPASS-4): a randomised, open-label, parallel-group, multicentre, phase 3 trial, Lancet source
May combine two claims.
PremisecitationIn the SURPASS-2 trial, all differences in HbA1c reduction between tirzepatide and semaglutide groups were less than 0.5%, with the lowest dose having a measured difference of -0.015%.
“For example, in the SURPASS-2 trial, while statistical significance was found, all differences in HbA 1c reduction between the 2 groups were less than 0.5%, with the lowest dose having a measured difference of -0.015%.”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [22] Frías, 2021, Tirzepatide versus semaglutide once weekly in patients with type 2 diabetes, N Engl J Med source
May combine two claims.
PremisecitationThe WAC and AWP of other GLP-1 receptor agonists for a 30-day supply are: liraglutide $709.74 and $851.69 for the 1.2-mg dose; semaglutide $892.06 and $1,070.47 for all doses; dulaglutide $886.56 and $1,065.87 for all doses.
“These costs can be compared to the WAC and AWP of other GLP-1 receptor agonists for a 30-day supply, including for liraglutide ($709.74 and $851.69 for the 1.2-mg dose), semaglutide ($892.06 and $1,070.47 for all doses), and dulaglutide ($886.56 and $1,065.87 for all doses).46”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [46] Tirzepatide, 2022
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
May combine two claims.
Premisenone givenTirzepatide has been demonstrated in clinical trials to result in superior HbA1c and weight reduction in patients with type 2 diabetes, when compared to placebo as well as other current standard therapies such as metformin, semaglutide, and insulin glargine.
“Using a novel mechanism of action that synergistically agonizes both GLP-1 and GIP incretin hormones, tirzepatide has been demonstrated in clinical trials to result in superior HbA 1c and weight reduction in patients with type 2 diabetes, when compared to placebo as well as other current standard therapies for diabetes management such as metformin, semaglutide, and insulin glargine.”
Quote in the paperSubstantial claimProbably not a substantial claim: may not pass S4 (based).
Premisenone givenWeight reduction with the lowest studied dose of tirzepatide exceeds that demonstrated with the highest dose of the GLP-1 receptor agonists currently indicated for weight loss in patients without diabetes.
“For example, weight reduction with the lowest studied dose of tirzepatide exceeds that demonstrated with the highest dose of the GLP-1 receptor agonists currently indicated for weight loss in patients without diabetes.”
Quote in the paperNot a substantial claimMay combine two claims.
Premisenone givenGLP-1 receptor agonists and SGLT-2 inhibitors have proven to be effective for glucose control, weight loss, and cardiorenal protection in patients with type 2 diabetes.
“These agents have proven to be effective, not only for glucose control, but also for additional pertinent considerations in patients with type 2 diabetes, such as weight loss and cardiorenal protection.”
Quote in the paperSubstantial claim
The paper relies on this without support.
Tirzepatide was approved in 2022 for the management of type 2 diabetes.
“Tirzepatide was approved in 2022 for the management of type 2 diabetes”
“Tirzepatide, a GLP-1 and GIP receptor agonist, is a novel agent for use in type 2 diabetes therapeutics that received Food and Drug Administration approval in the spring of 2022.”
The paper relies on this without support.
GIP receptor agonists have not yet been studied as a single-mechanism agent in humans.
“GIP receptor agonists have not yet been studied as a single-mechanism agent in humans”
The paper relies on this without support.
Many payor plans either exclude tirzepatide or require prior authorization to encourage use of GLP-1 receptor agonists before tirzepatide.
“Utilization criteria from major payors are beginning to be developed, but many plans either exclude tirzepatide or require prior authorization to encourage use of GLP-1 receptor agonists before tirzepatide.”
The paper relies on this without support.
No pharmacoeconomic studies have been published on tirzepatide.
“No pharmacoeconomic studies have been published on tirzepatide.”
Self-check
Percentages, sums and reported differences re-computed from the paper’s own numbers.
Each contradiction between two passages listed here was confirmed by an independent check.
SURPASS-2 confidence interval conflicts with its superiority P value
MajorThe stated 95% confidence interval for the 5-mg treatment difference includes zero, whereas the same comparison is described as superior with P = 0.02. Those results do not agree for a two-sided test of a difference from zero.
“This reduction was shown to be superior with tirzepatide 5 mg”
“(-0.15% difference with a 95% CI of -0.28% to 0.03%; P = 0.02)”
SURPASS-2 low-dose treatment difference changes tenfold
MinorThe SURPASS-2 results give the 5-mg treatment difference as -0.15%, but the later discussion calls the lowest-dose difference -0.015%.
“with the lowest dose having a measured difference of -0.015%.”
“tirzepatide 5 mg (-0.15% difference with a 95% CI of -0.28% to 0.03%; P = 0.02)”
SURPASS-2 enrollment count differs between text and table
MinorThe prose reports 1,878 patients randomized in SURPASS-2, while Table 1 lists 1,879 enrollees for that trial.
“Of 2,526 patients who were screened, 1,878 were included in the final randomization.”
“| No. of | enrollees | | 478 | | 1,879 |”
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Anti-diabetic drugs and weight loss in patients with type 2 diabetes
Lazzaroni, E., Ben Nasr, M., Loretelli, C., Pastore, I., Plebani, L., Lunati, M. E., Vallone, L., Bolla, A. M., Rossi, A., Montefusco, L., et al. (2021) · Pharmacological Research · doi:10.1016/j.phrs.2021.105782 · Cited by 182 · see citing works
Edholm, T., Degerblad, M., Grybäck, P., Hilsted, L., Holst, J. J., Jacobsson, H., Efendic, S., Schmidt, P. T., & Hellström, P. M. (2010) · Neurogastroenterology & Motility · doi:10.1111/j.1365-2982.2010.01554.x · Cited by 164 · see citing works
Fisman, E. Z., & Tenenbaum, A. (2021) · Cardiovascular Diabetology · doi:10.1186/s12933-021-01412-5 · Cited by 124 · see citing works
Helmstädter, J., Keppeler, K., Küster, L., Münzel, T., Daiber, A., & Steven, S. (2022) · British Journal of Pharmacology · doi:10.1111/bph.15462 · Cited by 99 · see citing works
Choi, J. G., Winn, A. N., Skandari, M. R., Franco, M. I., Staab, E. M., Alexander, J., Wan, W., Zhu, M., Huang, E. S., Philipson, L., et al. (2022) · Annals of Internal Medicine · doi:10.7326/m21-2941 · Cited by 87 · see citing works
Yang, C.-Y., Chen, Y.-R., Ou, H.-T., & Kuo, S. (2021) · Cardiovascular Diabetology · doi:10.1186/s12933-020-01211-4 · Cited by 51 · see citing works
Permana, H., Yanto, T. A., & Hariyanto, T. I. (2022) · Diabetes & Metabolic Syndrome: Clinical Research & Reviews · doi:10.1016/j.dsx.2022.102640 · Cited by 38 · see citing works
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Barbero (2014) · doi:10.1016/j · Cited by 1 · see citing works
Frias, J. P., Bonora, E., Ruiz, L. N., et al. (2021) · doi:10.2337/figshare.13315403.v1
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Flagged first, then by citations
Research works printed but not linked: 3
- 2022, Tirzepatide.
- 2022, Mounjaro subcutaneous injection, tirzepatide subcutaneous injection
- Tirzepatide, 2022, Micromedex Red Book [proprietary data]
Cited by
Sorted by citations
Glucagon‐like peptide agonists: A prospective review
Mariam, Z., & Niazi, S. K. (2023) · Endocrinology Diabetes & Metabolism · doi:10.1002/edm2.462 · Cited by 114 · see citing works
Semaglutide: a key medication for managing cardiovascular-kidney-metabolic syndrome
MacIsaac, R. J. (2025) · Future Cardiology · doi:10.1080/14796678.2025.2511412 · Cited by 25 · see citing works
“Semaglutide, dulaglutide, and tirzepatide utilize albumin binding and improved fatty acid attachment, which results in a longer half-life [44,205].”
Tirzepatide: a novel therapeutic approach for Alzheimer’s disease
Alshehri, G. H., Al-Kuraishy, H. M., Waheed, H. J., Al-Gareeb, A. I., Faheem, S. A., Alexiou, A. T., Papadakis, M., & Batiha, G. E. (2025) · Metabolic Brain Disease · doi:10.1007/s11011-025-01649-z · Cited by 14 · see citing works
“TRZ is contraindicated in patients with multiple endocrine neoplasia syndrome type 2 and medullary thyroid cancer (Krauss et al. 2023).”
Tirzepatide-associated starvation ketoacidosis
Mercer, J. A., Lipscomb, J., Lipscomb, J. S., Gao, H. T., & King, K. (2023) · Clinical Toxicology · doi:10.1080/15563650.2023.2277337 · Cited by 13 · see citing works
Incretin-based therapy: a new horizon in diabetes management
Zarei, M., Vaighan, N. S., Farjoo, M. H., Talebi, S., & Zarei, M. (2024) · Journal of Diabetes & Metabolic Disorders · doi:10.1007/s40200-024-01479-3 · Cited by 11 · see citing works
“The advantageous insulin-sensitizing action of tirzepatide doses of Cotadutide resulted in marginal enhancements in total cholesterol and triglyceride levels compared to liraglu - tide, but these improvements were not statistically signifi - cant [276].”
Al-Sabah, S. K., Al‐Khairi, I., Jamal, M. H., Qaddoumi, M. G., Al-Ajmi, F. A., Kumar, J., ABUKHALAF, N. A., Cherian, P., Madhu, D., Arefanian, H., et al. (2024) · Medical Principles and Practice · doi:10.1159/000540534 · Cited by 11 · see citing works
“In clinical trials, tirzepatide has shown promising results in promoting weight loss and ameliorating blood glucose control, with some patients achieving signi fi cant weight loss of up to 15 – 20% of their body weight [31, 32].”
BackgroundThe Therapeutic Potential of Glucagon-like Peptide 1 Receptor Agonists in Traumatic Brain Injury
Harej, A., Pilipović, K., Belančić, A., Juretić, L., Vitezić, D., & Mršić‐Pelčić, J. (2024) · Pharmaceuticals · doi:10.3390/ph17101313 · Cited by 9 · see citing works
“Twincretin is an injectable form of tirzepatide, a novel GLP-1 and GIP agonist for the treatment of type 2 diabetes [84].”
BackgroundKuleta, K., Krauz, K., Żmuda, J., Momot, K., Zarębiński, M., Poprawa, I., & Wojciechowska, M. (2025) · International Journal of Molecular Sciences · doi:10.3390/ijms26199271 · Cited by 2 · see citing works
“Therefore, some authors refer to it as a “twincretin” [82,83].”
Glucagon-Like Peptide-1 Receptor Agonists in Gynecologic Surgery
Hsu, R. C., Han, E., Swartz, S., & Pacis, M. (2025) · Obstetrics and Gynecology · doi:10.1097/aog.0000000000006035 · Cited by 1 · see citing works
A narrative review on tirzepatide’s therapeutic potential in glycemic control and cardioprotection
Thiriveedi, M., Domingo, F. S., Yates, H., Baddam, S., Beblawy, R. E., Nimmana, B., & Patel, S. (2025) · Annals of Medicine and Surgery · doi:10.1097/ms9.0000000000004055 · Cited by 5 · see citing works
“It is a first-in-class dual incretin agonist, often termed a “twincretin,” that activates both the GLP-1 and glucose-dependent insulinotropic polypeptide (GIP) receptors [ 7 ] .”
Bajpai, J., Saxena, M., Agarwal, U., & Pradhan, A. (2025) · World Journal of Experimental Medicine · doi:10.5493/wjem.v15.i4.109762 · Cited by 1 · see citing works
Tirzepatide attenuates lipopolysaccharide-induced acute lung injury via AMPK/NF-κB signaling pathway
Zhang, Y., & Li, L. (2026) · Tissue and Cell · doi:10.1016/j.tice.2026.103557 · Cited by 1 · see citing works
- Authors
- Krauss, Z., Hintz, A., & Fisk, R.
- Affiliations
- Cedarville University (US)
- Trinity Health Grand Rapids (US)
- Corresponding author
- Krauss, Zach
- Venue
- American Journal of Health-System Pharmacy
- Publisher
- Oxford University Press (OUP)
- Published
- 2023-04-18
- Volume
- 80
- Issue
- 14
- Pages
- 879-888
- ISSN
- 1079-2082 (ISSN-L)
- 1535-2900
- OpenAlex
- W4366236428
- Semantic Scholar
- 90c78479a9b99c3d6d4d0fc3530b4be99b23496d
- Cited by
- 12
- References
- 40
- Citations by year
- 2026: 1 · 2025: 6 · 2024: 3 · 2023: 2
- FWCI
- 0.43
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- American Journal of Health-System Pharmacy (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes Treatment and Management
- Health Sciences › Medicine › Pharmacology › Pharmacology and Obesity Treatment
- Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes Management and Research
- Keywords
- tirzepatide, type 2 diabetes, GLP-1 receptor agonists, GIP receptor agonist, glycemic control, weight loss, SURPASS trials, drug safety, dosage
- MeSH terms
- Glucagon-Like Peptide-1 Receptor, Tirzepatide, Diabetes Mellitus, Type 2, Humans, Hypoglycemic Agents, Quality of Life, Incretins
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Claims read by deepseek-v4.1-flash under definition version 3 (extract-v3) on 2026-10-11.
Classified by jev-1.13-20260917 (gold-guideline-v0.2) on 2026-10-11.
Cited sources are checked by gpt-6-sol.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
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