Keflex and lower back pain

keflex is terrible. took 500g 3x a day but only lasted two days instead of a week (and using the repeat i was prescribed) for my throat infection. it basically knocked me out for the two days i was on it, also experienced extreme nausea and some lower back pain...have now switched to amoxil after talking to my doctor and am feeling much better....won't be taking keflex again. i wonder if there are people who have taken it without any side effects.....

17/2/09 I was prescribed Keflex 500mg 3 times a day (every 8 hours) last week after being told that the symptoms I had were possibly due to a kidney infection and to take this over the weekend & ring for the results of the lab test on the urine sample given early Monday morning - I experienced loss of appetite, lower back pain, tingling in my lips & the side of my face(by Sunday night that occurred) severe foot cramps, pains in my leg & stomach pain - my husband advised me Sunday night to stop taking the drug until I had spoken to the surgery. (incidentally the Doctor had been wrong the lab tests showed no kidney infection!!) following cessation I woke up this morning with my whole body drenched in sweat!! My appetite though has returned. I will never take it again!! & all because of a wrong diagnosis!!