bacterial infection
"I am taking Septra for an infection on the tip of my nose. Day one was horrible. Nausea, fatigue, and vertigo {felt like a flu}. That lasted one day. Day 2-7 has been without issues. I take it with a meal and a good 12-16 ounces of fluid. 3 days to go and I expect that will be fine. My infection appeared much better by the 4th day."