Zantac® is a brand name for the drug ranitidine. Prescription dosing available as Zantac® EFFERdose® and Zantac® 300. It is used for maintenance treatment for duodenal, gastric ulcers, gastroesophageal reflux.
7 additional evaluations for Zantac 300 are not currently shared publicly.
What is ranitidine?
Ranitidine is in a group of drugs called histamine-2 blockers. Ranitidine works by reducing the amount of acid your stomach produces.
Ranitidine is used to treat and prevent ulcers in the stomach and intestines. It also treats conditions in which the stomach produces too much acid, such as Zollinger-Ellison syndrome. Ranitidine also treats gastroesophageal reflux disease (GERD) and other conditions in which acid backs up from the stomach into the esophagus, causing heartburn.
Ranitidine may also be used for other purposes not listed in this medication guide.
Do not use this medication if you are allergic to ranitidine.
Before using ranitidine, tell your doctor if you are allergic to any drugs, or if you have:
liver disease; or
If you have any of the conditions listed above, you may need a dose adjustment or special tests to safely take ranitidine.
The ranitidine effervescent tablet may contain phenylalanine. Talk to your doctor before using this form of ranitidine if you have phenylketonuria (PKU).
FDA pregnancy category B. This medication is not expected to be harmful to an unborn baby. Tell your doctor if you are pregnant or plan to become pregnant during treatment.
Ranitidine passes into breast milk. Do not take ranitidine without telling your doctor if you are breast-feeding a baby.
Using ranitidine may increase your risk of developing pneumonia. Symptoms of pneumonia include chest pain, fever, feeling short of breath, and coughing up green or yellow mucus. Talk with your doctor about your specific risk of developing pneumonia.
Avoid drinking alcohol. It can increase the risk of damage to your stomach.
Seek emergency medical attention if you think you have used too much of this medicine.
Overdose symptoms may include lack of coordination, feeling light-headed, or fainting.
Take the missed dose as soon as you remember. If it is almost time for your next dose, skip the missed dose and take the medicine at the next regularly scheduled time. Do not take extra medicine to make up the missed dose.
Before taking ranitidine, tell your doctor if you are taking triazolam (Halcion). You may not be able to use ranitidine, or you may need dosage adjustments or special tests during treatment.
There may be other drugs that can interact with ranitidine, or be affected by ranitidine. Tell your doctor about all the prescription and over-the-counter medications you use. This includes vitamins, minerals, herbal products, and drugs prescribed by other doctors. Do not start using a new medication without telling your doctor.
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