urinary tract infection
"It's my 4th day on Bactrim and it has not been great. I feel better from the overall symptoms but I've been fatigued and super groggy and for the first day I had a horrible headache. I keep feeling my heart pounding in my head and ears, but I agree with pretty much everyone else on here, the symptoms from the cure are better than the symptoms of my bladder/kidney infection. I've got 6 more days... Is it effective? Yes. Is it an enjoyable experience? No."