Comparative stability study of unit-dose repackaged furosemide tablets

The stability of a 40 mg furosemide tablet drug product repackaged in a unit-dose USP class A blister pack and the identical product in its original container made of HDPE material was studied under ICH long-term conditions of 25°C and relative humidity (RH) of 60% and accelerated stressed conditions of 40°C and 75% RH. Samples from original and repackaged drug products were periodically removed from storage conditions and subjected to pharmaceutical and spectroscopic analysis. Results indicate the potency 91.5 ± 0.9% of the tablet strength for the original packaging drug product vs 91.6 ± 4.0% for the repackaged product are statistically similar for long-term and accelerated stress conditions. Tablet hardness (6.0 ± 0.3 KP) and loss on drying (3.2%) was the same for original and repackaged drug products under both stressed conditions indicating similar moisture sorption behavior. Non-invasive spectroscopic techniques did not show any differences in moisture content. Dissolution and TGA results were simil...