Hey,
I do not know about your type of clindamycin,
but i had a root canal , and my doc gave me
clindamycin hcl 300 mg capsules, 4 tablets per day for 2 weeks. I was not advised anything about what supplements etc to take along. 2 weeks were fine.
After my medication stopped, i had anti-biotic induced diarrhoes for 2 months. every day was a nightmare. i looked up on internet, ant this was very common. I had to go to my physician and he put me on probiotic dose.