Abstract
The quality of 6 brands of cephalexin capsules (250mg) was evaluated by dissolution test (U. S. P. XIX) and some other tests in vitro. The dissolution rate of 1 (product F) of the 6 kinds of capsules was about 57% in the first 15 minutes, showing a statistically significant difference (p<0. 01) between the rates (nearly 100%) for the remaining 5. Further, the variations of weight, content and dissolution rate were larger in product F than in the others. The rate of in vitro dissolution may be a decisive factor in the in vivo absorption and excretion. From the viewpoint of uniformity of therapeutic effect, product F is undesirable.
