bacterial infection
"I agree with bad reviews. I followed instructions correctly. 
My dentist prescribed me this medication (300mg, 3 times/day) after my two wisdom teeth extraction. I was fine for 2 days. Third day I woke up in the middle of the night with a serious pain in my esophagus, chest. I felt like someone put the worst acid in my throat. It hurt that much I went to emergency room. They prescribed some pills to ease the pain but it didn't help. I'm still in pain. Do not play with this medication and choose a different one if possible."