Pepcid is an H2-blocker used to treat and prevent recurrence of stomach and duodenal ulcers. Pepcid is also useful in managing heartburn, gastroesophageal reflux disease and Zollinger-Ellison syndrome. Get emergency medical help if you have signs of an allergic reaction (hives, difficult breathing, swelling in your face or throat) or a severe skin reaction (fever, sore throat, burning in your eyes, skin pain, red or purple skin rash that spreads and causes blistering and peeling). Chronic rhinitis (nonallergic rhinitis, noninfectious) is a condition in which the sinus and nasal passages become inflamed causing symptoms like runny nose, sneezing, and nasal itching and congestion. Post nasal drip is drainage of mucous from the sinuses into the throat. Treatment for chronic rhinitis and post nasal drip include avoiding. Patient is a 62 year-old male with h/o mild persistent asthma (controlled with Q var inhaler) and allergic rhinitis (not on medicines) who gives h/o anaphylactic reaction with hypotension to Aleve in 2009. Note: This document contains side effect information about calcium carbonate / famotidine / magnesium hydroxide. Some of the dosage forms listed on this page may not apply to the brand name Pepcid Complete. Famotidine, sold under the trade name Pepcid among others, is a medication that decreases stomach acid production. It is used to treat peptic ulcer disease, gastroesophageal reflux disease, and Zollinger-Ellison syndrome. It is taken by mouth or by injection into a vein. It begins working within an hour. Pepcid Complete side effects. Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat. Find patient medical information for Pepcid Oral on WebMD including its uses, side effects and safety, interactions, pictures, warnings and user ratings. Pictures of Pepcid (Famotidine), drug imprint information, side effects for the patient. Allergies and food intolerance seem to be on the rise. Poor physical responses to food are frustrating it makes something that is necessary and should be enjoyable — eating — uncomfortable and possibly dangerous.