bacterial infection
"I was prescribed this medication for a tooth infection - 300mg 4 x day starting with a double dose as soon as I got the home. The night I took the first 2 pills, I immediately had several bouts of diarrhea. The next day when I moved down to 1 pill 4 x daily, I had more normal bowel motions. I did however stupidly take close to bedtime and without heeding the warning re: laying down. I woke up with the worst heartburn/chest pain. I just finished my pills and look forward to no more heartburn."