I've just started taking zantac, and I don't know if I'll have any side effects, or if my regular symptoms (stomach pain, upset stomach) will become apparent or come back. My question is this; if I get nauseous, stomach pain, upset stomach etc. as a side effect or other, can I take tums to calm my stomach down? Or will it just make things worse? I can't talk to my doctor because (a) don't have an appointment and (b) am too young to drive there or get an appointment myself.