One must be very careful with clindamycin. It is a broad spectrum Antibiotic and will kill all sorts of benficial bacteria as well as what you are targeting.
My son was prescribed clindamycin when he was 10 for an abcess.(due to a believed allergy to penicillin.)The clindamycin removed the abcess just fine, but then my son started having bouts of diarrhea that would last for a day or two,then subside, then return. Finally he started having a fever as well, so we took him to the hospital. He was admitted immediately with clostridium difficile.
Basically, the clindamycin killed all of his intestinal bacteria except one. This bacteria took over in his intestines. The waste products of this bacteria are toxic. Two more days and he would have died. He had to stay in isolation in the hospital, on IV etc.for over a week.

This is a very serious condition,(thus the isolation) Because many hospital patients are on Antibiotics , and this bacteria is highly contagious, it can decimate a hospital in no time. There are many instances of a clostridium difficile outbreak killing up to and over 20 hospital patients within a week.

In a normal person, the good bacteria will keep the c. Difficile in check, but to someone with weakened intestinal flora due to Antibiotics , c. difficile could be fatal.Even scarier is the fact that this was not understood until a few years before it affected my son,and more people were dying.
Immediately upon finishing a course of clindamycin, or any antibiotic, one should take probiotics(beneficial bacteria) to repopulate your intestines. This will help to keep the c.difficile in check. Eat your yogurt!