Posted in Web Zantac (Ranitidine) – Side Effects, Dosage, Interactions … September 19, 2019 Zantac is the brand name of the drug ranitidine, which is used to treat stomach and digestive problems. The drug is prescribed for conditions such as gastroesophageal reflux disease (GERD), ulcers … Link: https://www.everydayhealth.com/drugs/zantac