Supersaturated self-nanoemulsifying drug delivery systems (Super-SNEDDS) enhance the bioavailability of the poorly water-soluble drug simvastatin in dogs
Open accessAbstract
This study investigates the potential of supersaturated self-nanoemulsifying drug delivery systems (super-SNEDDS) to improve the bioavailability of poorly water-soluble drugs compared to conventional SNEDDS. Conventional SNEDDS contained simvastatin (SIM) at 75% of the equilibrium solubility (S (eq)). Super-SNEDDS containing SIM at 150 and 200% of S (eq) were produced by subjecting the SNEDDS preconcentrates to a heating and cooling cycle. The super-SNEDDS were physically stable over 10 months. During in vitro lipolysis of SNEDDS and super-SNEDDS the SIM concentration in the aqueous phase increased for the first 30 min almost proportional to the drug loads and amounts of preconcentrate employed. The 200% drug-loaded super-SNEDDS generated an amorphous SIM precipitate at the end of in vitro lipolysis. In vivo, the relative bioavailability of SIM from super-SEDDDS increased significantly to 180 ± 53.3% (p = 0.014) compared to the dosing of two capsules of (dose equivalent) 75% drug-loaded SNEDDS. A significant increase in the terminal half-life of elimination was observed for super-SNEDDS (2.3 ± 0.6 h) compared to conventional SNEDDS (1.4 ± 0.3 h) as well as a decreased area under the curve ratio of the SIM metabolite simvastatin acid to the parent compound (0.57 ± 0.20 and 0.90 ± 0.3), possibly due to a combination of saturation effects on presystemic metabolising enzymes and prolonged absorption along the small intestine. In summary, this study demonstrated that super-SNEDDS are a viable formulation option to enhance the bioavailability of poorly water-soluble drugs such as simvastatin while reducing the pill burden by an increased drug load of SNEDDS.
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“, 2016), simvastatin (Thomas et al., 2013), fenofibrate (Thomas et al.”
Self-citation
- Authors
- Thomas, N., Holm, R., Garmer, M., Karlsson, J. J., Müllertz, A., & Rades, T.
- Affiliations
- University of Otago (NZ)
- Lundbeck (Denmark) (DK)
- University of Copenhagen (DK)
- Corresponding author
- Müllertz, Anette
- Venue
- The AAPS Journal
- Published
- 2012-11-21
- Volume
- 15
- Issue
- 1
- Pages
- 219-227
- ISSN
- 1550-7416 (ISSN-L)
- PMC
- PMC3535117
- OpenAlex
- W2087545318
- Semantic Scholar
- 92c1f8594c1c3d4bd083d4cd2fe8a92191ed420f
- Cited by
- 144
- References
- 30
- Citations by year
- 2026: 4 · 2025: 10 · 2024: 5 · 2023: 8 · 2022: 6 · 2021: 7 · 2020: 23 · 2019: 13 · 2018: 13 · 2017: 6 · 2016: 15 · 2015: 10 · 2014: 13 · 2013: 10
- FWCI
- 6.54
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Licence
- www.springer.com/tdm (tdm)
- Locations
- The AAPS Journal (publishedVersion)
- Europe PMC (PubMed Central) (publishedVersion)
- PubMed Central (publishedVersion)
- PubMed (publishedVersion)
- Research at the University of Copenhagen (University of Copenhagen) (submittedVersion)
- Funders
- H. Lundbeck A/S
- Topics
- Life Sciences › Pharmacology, Toxicology and Pharmaceutics › Pharmaceutical Science › Drug Solubulity and Delivery Systems
- Life Sciences › Pharmacology, Toxicology and Pharmaceutics › Pharmaceutical Science › Advanced Drug Delivery Systems
- Life Sciences › Pharmacology, Toxicology and Pharmaceutics › Pharmaceutical Science › Advancements in Transdermal Drug Delivery
- Keywords
- self-nanoemulsifying drug delivery system, simvastatin, poorly water-soluble drugs, bioavailability enhancement, in vitro lipolysis, drug solubility, elimination half-life, dogs
- MeSH terms
- Animals, Biological Availability, Dogs, Drug Stability, Emulsions, Solubility, X-Ray Diffraction, Drug Delivery Systems, Hydroxymethylglutaryl-CoA Reductase Inhibitors, Simvastatin, Nanoparticles
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