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Important Note

The following information is intended to supplement, not substitute for, the expertise and judgment of your physician, pharmacist or other healthcare professional. It should not be construed to indicate that use of the drug is safe, appropriate, or effective for you. Consult your healthcare professional before using this drug.





This medication reduces the amount of acid in your stomach. It is used to treat and prevent ulcers, to treat gastroesophageal reflux disorder (GERD), and to treat conditions associated with excessive acid secretion.

How To Use

This medication is best taken with or immediately after meals. Antacids and sucralfate can block the effect of this medication. If you are taking an antacid in addition to this medication, separate the doses of each medication by at least one half hour. If you are taking sucralfate in addition to this medication, take the ranitidine 2 hours before the sucralfate. Do not stop taking this medication without your doctor's approval. Stopping therapy too soon may delay healing of the ulcer.

Side Effects

Nausea, diarrhea, headache, or dizziness may occur at first as your body adjusts to the medication. If these effects persist or become bothersome, inform your doctor. Notify your doctor if you experience: unusual bleeding or bruising, pounding chest pain, rash, difficulty sleeping, mental changes, extreme weakness. If you notice other effects not listed above, contact your doctor or pharmacist.


Before using this medication, tell your doctor or pharmacist your medical history, especially of: heartburn combined with lightheadedness or sweating or dizziness, chest pain or shoulder/jaw pain especially with shortness of breath, pain spreading to arms or neck or shoulders, unexplained weight loss, liver or kidney problems, tobacco use (smoking), other stomach problems (e.g., tumors), any allergies (including drug allergies). Women who are pregnant or breast-feeding should inform their doctors before taking this medication.

Drug Interactions

Tell your doctor of all over-the-counter and prescription medications you may use, especially of: ketoconazole, itraconazole, triazolam. This medication is available in both prescription and over-the-counter formulations. Do not take both at the same time. Do not start or stop any medicine without doctor or pharmacist approval.


If overdose is suspected, contact your local poison control center or emergency room immediately. Symptoms of overdose may include difficulty breathing, fast heartbeat, tremors, vomiting, restlessness, weakness, fatigue, or dizziness.


Your doctor may recommend some lifestyle changes such as stress-reducing programs, diet changes and exercise to assist in the treatment and prevention of ulcers. Ranitidine may affect the results of tests for urine protein. Be sure to tell your doctor you are taking ranitidine.

Missed Dose

If you miss a dose, take as soon as remembered; do not take if it is almost time for the next dose, instead, skip the missed dose and resume your usual dosing schedule. Do not "double-up" the dose to catch up.


Store between 39 and 77 degrees F (between 4 and 25 degrees C) away from moisture and sunlight. Do not store in the bathroom. Keep in a light-resistant bottle.