Diagnosed with gastritis 2 weeks ago - using Zantac (ranitidine). Day before and since having orange stool and constipation - please help - age 35/female?

No worries. If you are eating ok, don't worry. Drink lot of water. Bleeding in the stomach causes diarrhea not constipation . Not sure why stool is orange unless ur bathroom light is yellow. With gastritis u get black or red stools if it is severe. Eat light frequent meals. Avoid tobacco alcohol caffeine and meds like ibuprofen,Advil etc. Skip a meal if you want. Over eatin is also not good for few days.