Comparative dissolution rate studies of commercial furosemide tablets

Area of Science:

• Pharmaceutical Sciences
• Drug Formulation
• Quality Control

Background:

• Furosemide is a widely used diuretic.
• Ensuring consistent drug release and content across brands is crucial for patient safety and therapeutic efficacy.
• Variability in generic drug products can impact clinical outcomes.

Purpose of the Study:

• To evaluate the dissolution rate and drug content of five commercial furosemide tablet brands.
• To compare the performance of different furosemide brands based on United States Pharmacopeia (U.S.P.) standards.
• To assess inter-lot variations within brands and inter-brand variations.

Main Methods:

• Dissolution rate studies were conducted on multiple batches of five commercial furosemide tablet brands.
• Drug content analysis was performed for each brand.
• Results were compared against U.S.P. dissolution test requirements.

Main Results:

• Significant differences in drug release characteristics were observed among the furosemide brands.
• Only a limited number of batches from two brands (Fr and F) met U.S.P. dissolution standards.
• Substantial inter-lot variations in dissolution and drug content were found within certain brands, though inter-brand differences were more pronounced.

Conclusions:

• Commercial furosemide tablets exhibit considerable variability in dissolution profiles and drug content.
• Many brands do not consistently meet established quality standards, raising concerns about therapeutic equivalence.
• Further quality control and regulatory oversight are necessary to ensure the reliability of generic furosemide products.