Cited by 144Drug Solubulity and Delivery SystemsAdvanced Drug Delivery SystemsAdvancements in Transdermal Drug Delivery

Supersaturated self-nanoemulsifying drug delivery systems (Super-SNEDDS) enhance the bioavailability of the poorly water-soluble drug simvastatin in dogs

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Thomas, Nicky, Holm, René, Garmer, Mats, Karlsson, Jens Jakob, Müllertz, Anette, Rades, Thomas·2013·The AAPS Journal

Abstract

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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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)
OpenAlex
W2087545318
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
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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