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.

Precautions

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:

  • kidney disease;
  • liver disease; or
  • porphyria.

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.

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Instructions

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.

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Side Effects

Stop using ranitidine and get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.

Call your doctor at once if you have any of these serious side effects:

  • chest pain, fever, feeling short of breath, coughing up green or yellow mucus;
  • easy bruising or bleeding, unusual weakness;
  • fast or slow heart rate;
  • problems with your vision;
  • fever, sore throat, and headache with a severe blistering, peeling, and red skin rash; or
  • nausea, stomach pain, low fever, loss of appetite, dark urine, clay-colored stools, jaundice (yellowing of the skin or eyes).

Less serious side effects may include:

  • headache (may be severe);
  • drowsiness, dizziness;
  • sleep problems (insomnia);
  • decreased sex drive, impotence, or difficulty having an orgasm; or
  • swollen or tender breasts (in men);
  • nausea, vomiting, stomach pain; or
  • diarrhea or constipation.

This is not a complete list of side effects and others may occur. Tell your doctor about any unusual or bothersome side effect. You may report side effects to FDA at 1-800-FDA-1088.

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Interactions

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.

Other Names

Zantac, Zantac 150, Zantac 300, Zantac 300 GELdose, Zantac 75, Zantac EFFERdose, Zantac GELdose, ranitidine, and Taladine

Available Strengths & Dosages


Route Form Strength
oral tablet 300 mg

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Disclaimer

Every effort has been made to ensure that the information provided by Cerner Multum, Inc. ('Multum') is accurate, up-to-date, and complete, but no guarantee is made to that effect. Drug information contained herein may be time sensitive. Multum information has been compiled for use by healthcare practitioners and consumers in the United States and therefore Multum does not warrant that uses outside of the United States are appropriate, unless specifically indicated otherwise. Multum's drug information does not endorse drugs, diagnose patients or recommend therapy. Multum's drug information is an informational resource designed to assist licensed healthcare practitioners in caring for their patients and/or to serve consumers viewing this service as a supplement to, and not a substitute for, the expertise, skill, knowledge and judgment of healthcare practitioners. The absence of a warning for a given drug or drug combination in no way should be construed to indicate that the drug or drug combination is safe, effective or appropriate for any given patient. Multum does not assume any responsibility for any aspect of healthcare administered with the aid of information Multum provides. The information contained herein is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects. If you have questions about the drugs you are taking, check with your doctor, nurse or pharmacist.

Copyright 1996-2004 Cerner Multum, Inc. Version 2.05. Revision date 8/23/04

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