After an endoscopy the Doctor prescribed Lansoprazole 30 mg twice a day for 4 weeks, then one a day there after.[ No antibotic ] Because of red spots all over the lining of my stomach. This 30 mg twice a day seems very excessive to me ?? The last Endoscopy 3 years ago the doctor prescribed an antibotic for 10 days AND ONE 30MG PREVACID A DAY because of bacteria infection in the stomach. Any suggestions?