I was prescribed Bactrim by an ER doctor after seeing them to have a procedure done to drain an infection underneath my fingernail. I completed my medication without having any known side effects. (however I was itching a lot underneath my feet, but I didn't realize it was a side effect at the time). The day after I finished the medicine I developed flu like symptoms. I had chills, hot flashes,fever, my whole body was aching. Even my eyes hurt! I stayed home from work for two days, expecting to come down with the flu then surprisingly on day 3 all of the flu symptoms left. Then I developed sever itching all over my body. I tried lotions, bath soaks, anti-itch creams. But it just won't seem to go away. I have also developed a yeast infection. The bottom of my feet itch like crazy and are red. This is my 4th day off the medication and my 3rd day of severe itching. I am wondering how long these symptoms will last. I am glad I found this site because I was really wondering what was going on with that "flu" symptom thing. I will never use Bactrim again!!