Keflex and dizzy spells

Had Keflex before and got no side effects at all, Im paraplegic and suffer from UTI's quite a lot, i am also allergic to penicillin. Got given keflex 2 days ago for another uti and this time round i am doing nothing but sleep, I can manage 9 hours awake before i start getting the head drop tiredness. I was given cefaclor last time too, only manage to take 1 of them (250mg) and i got some massive head dizzy spells and random arm twitching, that's when they was changed to keflex (500mg x3td) which im taking now.

No belly pains, well i felt as tho i was all stiff and rigid the first day i started the pills but the day after i was fine no pain at all, just the awful tiredness. I shall cope with it tho as I want rid of this foul smelling urine.

I was on keflex 500 mg every 8 hours. After four doses, I experienced dizziness, difficulty breathing and syncope. I also had palpitations, high blood pressure, ice cold hands & feet and continued to have dizzy spells while lying flat on my back. None of the labs done in the ER could explain this. It's the keflex. I have taken penicillin before without any adverse reaction. I will never take Keflex again.

i have only taken it for 1 day & I am having dizzy spells when i stand up & very metallic taste in mouth