Before you make any rash(LOL) choices you should also consider how long you have been on the medicine. If you have been taking the meds for 6 months or more and all of a sudden you get a rash, it might not be the meds at all. If you just started the meds and the rash appears then it is probably the meds. Being allergic to meds isnt that uncommon, but it might be a good idea to talk to an allergist if the meds turn out to be responsible.
Pat