Abstract
Purpose
Propofol is a water-insoluble intravenous anesthetic agent that is actually formulated as a water-in-oil emulsion with known drawbacks such as pain on injection, microorganism growth support and stability. We report on the properties of formulations of propofol in poly (N-vinyl-2-pyrrolidone)-block-poly(d,l-lactide), PVP–PLA, polymeric micelles (Propofol-PM).
Methods
Microbial growth in these formulations was evaluated with Pseudomonas aeruginosa (ATCC 9027), Staphylococcus aureus (ATCC 6538), Escherichia coli (ATCC 25922) and Candida albicans (ATCC 10231). Sleep-recovery studies in female Sprague–Dawley rats, at a dose of 10mg/kg were performed to compare pharmacodynamic profiles of the new Propofol-PM formulations with those of Diprivan®, a commercially available lipid based propofol formulation.
Results
Growth of microorganisms was not supported in the Propofol-PM formulations tested. No significant differences in times to unconsciousness, awakening, recovery of righting reflex and full recovery were observed between Propofol-PM formulations and Diprivan®.
Conclusions
Propofol loaded in PVP–PLA micelles (Propofol-PM) is not significantly different in terms of pharmacodynamic but demonstrates no microorganism growth support and improved stability that opens up the door to pain on injection reduction strategy.
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Acknowledgements
The authors would like to thank Dr. Serge Messier for his expertise in reviewing and performing the microbial study protocol.
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Ravenelle, F., Gori, S., Le Garrec, D. et al. Novel Lipid and Preservative-free Propofol Formulation: Properties and Pharmacodynamics. Pharm Res 25, 313–319 (2008). https://doi.org/10.1007/s11095-007-9471-5
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DOI: https://doi.org/10.1007/s11095-007-9471-5