dental abscess
"I was prescribed seven days of metronidazole for a dental infection, augmenting a separate course of co amoxiclav which I had already started but which was not working. Five days into the metronidazole course, the medicine seemed to be having an effect on the infection, but it was having a rough effect on me too. Side effects included nausea, flu symptoms - pain in joints and muscles and overwhelming malaise - light sensitivity, as in a migraine, headache, stomach bloating, tingling in my feet. This was so hideously bad that I had to stop the medication after five days. I think metronidazole works, but at a very great cost to the rest of the body if one is as sensitive to it as this."