Cited by 200Lipoproteins and Cardiovascular HealthPain Management and Placebo EffectStatistical Methods in Clinical Trials

Side Effect Patterns in a Crossover Trial of Statin, Placebo, and No Treatment

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Howard, James P., Wood, Frances A., Finegold, Judith A., Nowbar, Alexandra N., Thompson, David M., Arnold, Ahran D., Rajkumar, Christopher A., Connolly, Susan +7 more·2021·Journal of the American College of Cardiology

Abstract

BACKGROUND: Most people who begin statins abandon them, most commonly because of side effects. OBJECTIVES: The purpose of this study was to assess daily symptom scores on statin, placebo, and no treatment in participants who had abandoned statins. METHODS: Participants received 12 1-month medication bottles, 4 containing atorvastatin 20 mg, 4 placebo, and 4 empty. We measured daily symptom intensity for each using an app (scale 1-100). We also measured the "nocebo" ratio: the ratio of symptoms induced by taking statin that was also induced by taking placebo. RESULTS: A total of 60 participants were randomized and 49 completed the 12-month protocol. Mean symptom score was 8.0 (95% CI: 4.7-11.3) in no-tablet months. It was higher in statin months (16.3; 95% CI: 13.0-19.6; P < 0.001), but also in placebo months (15.4; 95% CI: 12.1-18.7; P < 0.001), with no difference between the 2 (P = 0.388). The corresponding nocebo ratio was 0.90. In the individual-patient daily data, neither symptom intensity on starting (OR: 1.02; 95% CI: 0.98-1.06; P = 0.28) nor extent of symptom relief on stopping (OR: 1.01; 95% CI: 0.98-1.05; P = 0.48) distinguished between statin and placebo. Stopping was no more frequent for statin than placebo (P = 0.173), and subsequent symptom relief was similar between statin and placebo. At 6 months after the trial, 30 of 60 (50%) participants were back taking statins. CONCLUSIONS: The majority of symptoms caused by statin tablets were nocebo. Clinicians should not interpret symptom intensity or timing of symptom onset or offset (on starting or stopping statin tablets) as indicating pharmacological causation, because the pattern is identical for placebo. (Self-Assessment Method for Statin Side-effects Or Nocebo [SAMSON]; NCT02668016).

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Crossref · 10.1016/j.jacc.2021.07.022

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  • In a randomized controlled trial, 90% of symptoms while on a statin also occurred while on placebo.

    “A randomized controlled trial found 90% of symptoms while on a statin also occurred while on placebo [5].”

    From Intolerance upon statin rechallenge: A systematic review and meta-analysis of randomized controlled trials (2023) · cites this paper as [5]

    The Results (Symptom scores for statin, placebo, and no treatment; page not available) report a nocebo ratio of 0.90 and similar mean symptom scores during statin and placebo months. But the 90% is a ratio of symptom increases relative to no-tablet months, not a finding that 90% of all symptoms experienced while taking a statin also occurred while taking placebo. (LLM, conf=0.88)

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  • Ten trials provided data on incidence of muscle symptoms.

    “Ten trials [20,21,25,26,40,43,46–49] provided data on incidence of muscle symptoms”

    From Safety outcomes of statin vs non-statin lipid-lowering interventions in patients with prior statin-associated muscle symptoms: A systematic review and meta-analysis (2025) · cites this paper as [26]

    The Methods (Participants) identify this as a statin crossover trial, and the Results (Participants) report that 36 of 60 participants had previously abandoned statins because of muscle ache. That is a pre-enrollment symptom history, not incidence of muscle symptoms during the trial; the reported trial outcomes concern symptom intensity of any type. This source also cannot establish the citing sentence’s total of ten trials. (LLM, conf=0.82)

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  • Most trials used statins with low to moderate intensity.

    “Most trials used statins with low to moderate intensity [20,21,24–26,40,43,46,48,49]”

    From Safety outcomes of statin vs non-statin lipid-lowering interventions in patients with prior statin-associated muscle symptoms: A systematic review and meta-analysis (2025) · cites this paper as [26]

    The Methods (Procedures and medications; page unavailable) state that this trial used atorvastatin 20 mg, and Study limitations say it tested one statin at one dose. The paper does not classify that dose by intensity or establish what most trials used; it supports the claim only as an example of a trial using that dose. (LLM, conf=0.83)

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  • Nine trials provided data for treatment discontinuation due to muscle symptoms.

    “Nine trials [22,25,26,40,43,46–48] provided data for treatment discontinuation due to muscle symptoms”

    From Safety outcomes of statin vs non-statin lipid-lowering interventions in patients with prior statin-associated muscle symptoms: A systematic review and meta-analysis (2025) · cites this paper as [26]

    The Results section ('Early stopping of tablet months caused by intolerable symptoms'; page unavailable) reports early tablet stopping for statin and placebo, so this trial provided discontinuation data. But stopping was recorded for intolerable symptoms generally, not specifically for muscle symptoms. This paper also cannot establish the citing sentence’s aggregate count of nine trials. (LLM, conf=0.86)

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  • The trials comparing statin-based therapy to placebo showed similar between-group incidence of muscle symptoms and statin-discontinuation rate.

    “The trials comparing statin-based therapy to placebo showed similar between-group incidence of muscle symptoms and statin-discontinuation rate. [20,21,25,26,43,47]”

    From Safety outcomes of statin vs non-statin lipid-lowering interventions in patients with prior statin-associated muscle symptoms: A systematic review and meta-analysis (2025) · cites this paper as [26]

    The Abstract Results report similar overall symptom scores during statin and placebo months and no significant difference in stopping frequency. The Discussion gives early tablet-cessation rates of 21.6% and 17.2%, respectively. The paper does not report a separate between-treatment incidence of muscle symptoms; it compares overall symptom scores, so that specific part of the claim is not established. (LLM, conf=0.86)

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Authors
Howard, J. P., Wood, F. A., Finegold, J. A., Nowbar, A. N., Thompson, D. M., Arnold, A. D., Rajkumar, C. A., Connolly, S., Cegla, J., Stride, C., Sever, P., Norton, C., Thom, S. A. M., Shun-Shin, M. J., & Francis, D. P.
Affiliations
  • Imperial College London (GB)
  • Imperial College Healthcare NHS Trust (GB)
  • University of Sheffield (GB)
  • King's College London (GB)
Venue
Journal of the American College of Cardiology
Publisher
Elsevier BV
Published
2021-09
Volume
78
Issue
12
Pages
1210-1222
ISSN
0735-1097 (ISSN-L)
OpenAlex
W3200521827
Cited by
198
References
26
Citations by year
2026: 35 · 2025: 34 · 2024: 38 · 2023: 51 · 2022: 38 · 2021: 2
FWCI
30.30
Type
journal article
Language
en
Open access
Locations
  • Journal of the American College of Cardiology (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, other-oa)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • White Rose Research Online (University of Leeds, The University of Sheffield, University of York) (acceptedVersion)
  • UCL Discovery (University College London) (submittedVersion)
  • Research Portal (King's College London) (submittedVersion, other-oa)
  • Spiral (Imperial College London) (submittedVersion, other-oa)
Funders
  • Wellcome Trust (212183/Z/18/Z)
  • National Institute for Health and Care Research (CL-2020-21-004, NIHR300166, CL-2018-21-001)
  • British Heart Foundation (PG/15/7/31235, FS/14/25/30676, FS/14/27/30752)
  • Medical Research Council (MR/S021108/1)
Topics
  • Health Sciences › Medicine › Surgery › Lipoproteins and Cardiovascular Health
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Pain Management and Placebo Effect
  • Physical Sciences › Mathematics › Statistics and Probability › Statistical Methods in Clinical Trials
Keywords
statins, atorvastatin, statin adverse effects, nocebo effect, placebo effect, symptom intensity, crossover trial, daily symptom monitoring, mobile health apps, hypercholesterolemia
MeSH terms
Atorvastatin, Aged, Double-Blind Method, Female, Humans, Male, Middle Aged, Cross-Over Studies, Hydroxymethylglutaryl-CoA Reductase Inhibitors, Nocebo Effect

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