urinary tract infection
"A few hours after the first dose my arm muscles started burning like I just lifted a bunch of weights and my neck was hurting on one side but I think it was because I was so tense and worried about taking it. These symptoms lasted for about two or three more doses than went away. Took my last pill today and the only other side effects I had were headache and lightheadedness and my heart would beat faster every now and then."