Costly drugs symptoms and conditions

I had a little case of pneumonia and the doctor prescribed avelox to me. since the first day i took it i experienced numbness in my legs and i was feeling very weak, i thought those symptoms were from pneumonia so i continued to take avelox. after taking avelox for 6 days i saw my doctor and i told him about everything i was feeling, numbness in my legs and arms, tingling in my whole body(even my lips), and i felt very weak. my doctor gave me some tests and everything seemed to be fine. but i kept feeling really bad, i started to get chest pain. i went to the ER and they ran some tests, they told me i was fine. they told me to go to a neurologist. later that day i read on the back of the prescription and i saw that everything i was feeling i saw as side effects on the prescription. By the time i saw that i have already taken all of the medication. now i'm waiting to see when the side effects will go away. i wonder why any of the doctors i went to didn't know these were side effects from the medication, i will never take this medication again.