Sinusitis
"I took this for four and a half days. I experienced complete appetite loss, nausea, fatigue, abdominal pain, and anxiety.  I had blood work done before I took the Bactrim and when I got my results back it turned out I didn&#039;t have a bacterial infection at all. All that for nothing. I still haven&#039;t completely recovered my appetite and it has been almost a week since my last dose."