bacterial infection
"I had a root canal 2 weeks ago, and there was no abscess or infection then. After the second part of the root canal a couple days ago, the x-ray showed an infection. Since I'm allergic to penicillin, they prescribed clindamycin. I have a sensitive stomach, and this medicine really did a number on me! I took 3 capsules 8 hours apart, and each one had worse results. I also forgot about not lying down for 30 minutes after taking a pill the 3rd time. I filled my stomach up with food to try and protect it, but it didn't work. I had nausea, stomach pain, and intestinal cramps. I have no idea if it would have cleared the infection. I just started taking cephalexin tonight, which can also cause stomach problems, but so far it hasn't."