Franz Diffusion Cell Approach for Pre-Formulation Characterisation of Ketoprofen Semi-Solid Dosage Forms

Area of Science:

• Pharmaceutical Sciences
• Drug Delivery Systems
• Dermatopharmacology

Background:

• Topical and transdermal drug delivery requires robust methods for evaluating drug release profiles.
• Semi-solid formulations like gels and suspensions present unique challenges in predicting in vivo performance.
• Pre-formulation studies are crucial for optimizing drug product development and ensuring efficacy.

Purpose of the Study:

• To compare ketoprofen (KTP) release profiles from a gel and a suspension using Franz diffusion cells.
• To demonstrate the utility of Franz diffusion cells for semi-solid formulation development and claim substantiation.
• To evaluate the performance of different membrane types in simulating physiological conditions.

Main Methods:

• Ketoprofen (KTP) release was assessed using vertical Franz diffusion cells under physiological conditions (pH 5.6-7.4, 37°C).
• Two formulations (gel and suspension) and two membrane types (regenerated cellulose and Strat-M®) were evaluated over 24 hours.
• Drug permeation was quantified to compare release efficiencies between formulations and membranes.

Main Results:

• Ketoprofen permeation was significantly influenced by both the formulation vehicle and the membrane type used.
• The gel formulation exhibited higher KTP permeation efficiencies compared to the suspension.
• Strat-M® membranes provided reproducible results, indicating their suitability for performance evaluation.

Conclusions:

• Franz diffusion cell methodology is a valuable tool for evaluating drug release from semi-solid topical formulations.
• Formulation vehicle choice (gel vs. suspension) critically impacts ketoprofen permeation.
• Strat-M® membranes offer a reliable and easily implementable option for pre-formulation and performance assessment of topical products.