What Are The Uses And Side Effects Of Clindamycin Tablets?

Almost 3 weeks ago, my dentist prescribed Clindamycin to me, and I started to have diarrhea, he said it was normal. Right now I already finished my prescription for almost 2 weeks now, but still I'm having loose stool. about 3 days ago i have another diarrhea for 2 days, so i had my stool examine, the result shows no parasites,ova,amoeba, PUS cells: 0-1/hpf RBC 2-4/hpf.As of today, i still have loose stool once a day, it is normal? What should I do to improve my condition? Thank you.