Clindamycin
"2 pills 3x day- 5 days. Got 4 wisdom teeth removed. Day 1- 1st dose, pills were hard to swallow and a few minutes after I took the pills I got an upset stomach. 2nd dose was about the same but I got a rash on my face (cheeks). 3rd dose stomach pain got a little worse. Day 2 stomach pain got even worse with every dose. Day 3 morning dose was unbearably painful in my esophagus/stomach. Called my doctor and he told me to stop taking pills. I figured stomach/esophagus pain would go away since I'm not taking pills but its been 6 days since I stopped taking pills and I still have pain. A lot of pain when I eat and burp. Pain feels like a tightening and burning in my chest every time I swallow. "