What Zantac 75 Relief is and what it is used for. Zantac 75 Relief is used to treat indigestion and heartburn for up to 12 hours. The stomach produces acid which helps to digest food. Sometimes your stomach produces too much acid which can cause indigestion and heartburn. Warnings Allergy alert: Do not use if you are allergic to ranitidine or other acid reducers (Please read all of this information before taking Zantac 75.) Zantac 75 contains 75 mg of ranitidine (as ranitidine hydrochloride, 84 mg), a medicine that doctors have prescribed more than. Zantac is used to treat and prevent ulcers in the stomach and intestines. Includes Zantac side effects, interactions, indications, recalls, cancer risk warnings, FDA alerts, and news updates. Zantac 75 is a medication that is used for the temporary management and relief of symptoms associated with excess stomach acid. It may help relieve occasional heartburn that occurs due to certain foods or beverages, acid indigestion, and sour stomach. Warnings Allergy - alert: Do not use if you are allergic to ranitidine or other - acid reducers Zantac 75 (RANITIDINE HYDROCHLORIDE) DailyMed prescribing information: boxed warnings, indications, dosage, adverse reactions, interactions, storage, and lab. It can control acid production for up to 12 hours and reduce the frequency and severity of heartburn. Zantac made with ranitidine was used to treat a variety of gastrointestinal disorders, including heartburn, GERD and gastric ulcers. In June 2019, Valisure informed the US Food and Drug Administration (FDA) that Zantac -branded and generic ranitidine resulted in very high levels of NDMA in the human body due to an inherent instability of the ranitidine molecule. [52][53] Ranitidine is used to treat and prevent ulcers in the stomach and intestines. It is also used to treat conditions in which the stomach produces too much acid, such as Zollinger-Ellison syndrome.