Bacterial Skin Infection
"I found that within a day of taking Bactrim the infection got better, which was GREAT because I had had it for a while.  I experienced a few side effects, dizziness, lack of energy, insomnia if I took the pill a few hours before bed (I found to overcome this I took the pill just before going to sleep) and headaches but they seemed to dissipate after 2-3 days."