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In Vitro Release Testing of Acyclovir Topical Formulations Using Immersion Cells
Madhur Kulkarni1, Shrikant Potdar1, Abhijit A Date2
1Department of Pharmaceutics, Shree Chanakya Education Society's Indira College of Pharmacy, Pune, India.
Assay and Drug Development Technologies
|October 9, 2020
Summary
Immersion cells offer a reliable method for in vitro release testing (IVRT) of topical acyclovir formulations. This optimized IVRT method effectively differentiates drug release rates and demonstrates discriminatory potential for quality control.
Area of Science:
- Pharmaceutical Sciences
- Drug Delivery Systems
- Topical Formulations
Background:
- In vitro release testing (IVRT) is crucial for topical formulations.
- Immersion cells offer a potential method for IVRT.
- Optimizing IVRT methods ensures accurate drug release assessment.
Purpose of the Study:
- To validate the use of immersion cells for IVRT of topical acyclovir formulations.
- To optimize IVRT parameters for acyclovir release.
- To assess the discriminatory capability of the immersion cell method.
Main Methods:
- Marketed acyclovir 5% cream used as a model formulation.
- Immersion cell method optimized for membrane type, temperature, media volume, agitation, and cell size.
- In-house and various marketed acyclovir topical formulations tested.
Main Results:
- Increased media temperature (32°C to 37°C) and agitation speed (50-150 rpm) enhanced acyclovir release.
- Larger immersion cell sizes (0.5, 2, 4 cm²) showed increased drug release.
- The optimized method successfully differentiated drug release among formulations with varied compositions.
Conclusions:
- The optimized immersion cell method is a simple, reliable tool for IVRT of topical acyclovir.
- This method demonstrates discriminatory potential for marketed formulations.
- Immersion cells can aid in product development and quality control for semisolid formulations.
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