A mandatory test (unless otherwise justified) to confirm the active substance is released at the right rate and time.
A simpler, practical test for non-potent drugs where the active substance comprises a large proportion of the tablet weight. Twenty tablets are weighed individually; the average mass is calculated, and no more than two tablets deviate from the average by more than 5% (or 7.5% for larger tablets). European Pharmacopoeia -ph. Eur.- Monograph Tablets -0478-
Ph. Eur. 2.9.5 This is the "20 tablets weighed" test. A mandatory test (unless otherwise justified) to confirm
Monograph 0478 classifies tablets based on their release characteristics and site of action: the average mass is calculated