urinary tract infection
"Great medication for curing UTI but the side effects are horrendous and not worth it.  After 3 days tendon pain in my heels, pain and tingling in my feet made it almost impossible to walk.  Dr. took me off immediately and now, more than 3 months later the pain is finally beginning to subside.  Never suffered side effects from any medication when younger but now at 65 have to be extremely careful."