What is ranitidine. Ranitidine is a class of medications called histamine-2 blockers (H2 blockers) and ranitidine works by reducing the amount of acid your stomach produces. You will need to take a combination of medications (under medical supervision) like a proton pump inhibitor such as omeprazole, lansoprazole or pantoprazole empty stomach in the morning and an antacid gel after meals for complete relief. Helpful, trusted answers from doctors: Dr. Arnold on constant full feeling in upper stomach: This is probably due to movement through the intestine of food products and liquid. The fluttering you describe is intestinal or possibly gall bladder contractions after a meal containing fried foods in excess. See if you can correlate with timing and. Clear, transparent answers from Doctors: Experiencing negative side effects such as a bloated stomach from taking antibiotics? Learn how to solve the problem with Dr. Essers. Ranitidine belongs to a group of drugs called histamine-2 blockers. It works by reducing the amount of acid your stomach produces. Ranitidine is used to treat and prevent ulcers in the stomach and intestines. Zantac belongs to a group of drugs called histamine-2 blockers. Ranitidine works by reducing the amount of acid your stomach produces. Zantac is used to treat and prevent ulcers in the stomach and intestines. How to Reduce Excess Stomach Acid. Your stomach is full of naturally produced acid that helps break down food and protects the GI tract from infection. But, excess stomach acid can cause uncomfortable symptoms, pain, and even severe health. Balance your stomach acid naturally! Lily of the Desert’s Aloe Herbal Stomach Formula is a special blend of certified organic aloe vera and trusted herbs that have been known to help maintain overall healthy digestion. ABSTRACT. QUESTION. In addition to suffering from nausea and vomiting of pregnancy, which is being treated with antiemetics, some of my pregnant patients complain of heartburn and acid reflux. Study Design and Recruitment. The study, conducted between August 1992 and April 1995, was an international double-blind, randomized evaluation of omeprazole and ranitidine for healing and.