Clindamycin
"Prescribed 300 mg 3x a day for five days. Take during a normal sized meal. Side effects have been occasional diarrhea and now the worst chest pain/heartburn. Took the medicine before bed, didn't lie down until later but woke up with incredible pain in my chest that spread. Before reading these posts, the chest pain was so bad I was ready to go to the ER. Unsure how long this heartburn will last, otherwise this antibiotic did it's job and the infection is is mostly gone. Very effective. Still have a couple more days to go. "