Should i continue using betaclav 625 if i get massive headaches, body rash, and fever attacks, i have been using it for two days now and seem to be getting ill not recover, it was prescribed for a spider byt?

Reaction: Are you allergic to penicillin? Amoxicillin, one of the 2 ingredients in betaclav, is in the penicillin family. I think you're experiencing an allergic reaction to betaclav and you should notify your physician of this possibility and follow his/her instructions regarding stopping it, getting treatment and deciding on a different antibiotic depending upon the appearance of the spider bite.