Aciphex and prevacid are in the same class of medications - the proton pump inhibitors. If you had an allergic reaction to prevacid, it is possible that aciphex may give the same reaction.
However, this depends on what park of the prevacid you were allergic to. There are some small differences between the formulation, so there is a chance that what you were allergic to in the prevacid may not be present in the aciphex.
To be on the safe side, you may want to discuss this allergy with your personal physician before trying the aciphex.
Followup with your personal physician is essential.
This answer is not intended as and does not substitute for medical advice - the information presented is for patient education only. Please see your personal physician for further evaluation of your individual case.
Thanks,
Kevin, M.D.