Dumping test: In vitro predictive tool for bioequivalence of Telmisartan formulations

Area of Science:

• Pharmaceutical Sciences
• Drug Dissolution
• Bioequivalence Studies

Background:

• The "dumping" test is a dynamic dissolution method for evaluating Class II drug products.
• It is recognized as a valuable tool in bioequivalence trials.

Purpose of the Study:

• To assess the dumping test's ability to predict the in vivo performance of Telmisartan formulations.
• To develop a Level A in vitro-in vivo correlation (IVIVC) for immediate-release Telmisartan products.

Main Methods:

• Dumping tests involved placing drug products in 0.01 N HCl at 37°C, followed by transfer to a USP 2 apparatus with pH 6.8 phosphate buffer.
• Dissolution profiles were analyzed using the similarity factor (f2) to determine bioequivalence.
• A one-step Level A IVIVC model was established.

Main Results:

• The similarity factor (f2) indicated non-similarity between reference and non-bioequivalent formulations (46.47) and similarity between reference and bioequivalent formulations (57.43).
• The developed IVIVC confirmed a Level A correlation, aligning with in vitro dissolution findings.

Conclusions:

• The dynamic dumping test is a valuable tool for analyzing the in vivo dissolution of Telmisartan immediate-release formulations.
• This method aids in predicting drug product performance and supports bioequivalence assessments.