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    Related terms
    • U.S. Brand Names: Zantac 150® [OTC];Zantac 75® [OTC];Zantac®;Zantac® EFFERdose®
    • Canadian Brand Names: Acid Reducer;Acid Reducer Maximum Strength Non Prescription;Apo-Ranitidine®;CO Ranitidine;Dom-Ranitidine;Med-Ranitidine;Mylan-Ranitidine;Novo-Ranidine;Nu-Ranit;PHL-Ranitidine;PMS-Ranitidine;Ranitidine Injection, USP;ratio-Ranitidine;Riva-Ranitidine;Sandoz-Ranitidine;ScheinPharm Ranitidine;Zantac 75®;Zantac Maximum Strength Non-Prescription;Zantac®;ZYM-Ranitidine
    • Mexican Brand Names: Acloral;Azantac;Galidrin;Iqfadina;Ranisen
    • Pharmacologic Category: Histamine H2 Antagonist

    • This medicine is used to treat gastroesophageal reflux disease.
    • This medicine is used to prevent or treat gastrointestinal ulcers caused by infection.
    • This medicine is used to treat heartburn, acid indigestion, and sour stomach.
    • This medicine is used to treat syndromes caused by huge amounts of stomach acid.
    • Ranitidine prevents symptoms and damage to the gastrointestinal tract caused by stomach acid or infection.


    How to take

    • Take this medicine with or without food. Take with food if it causes an upset stomach.
    • Take this medicine at bedtime if you are taking once a day.
    • Drop effervescent tablet in 1 teaspoonful of water. Drink when dissolved.
    • A liquid (syrup) is available if you cannot swallow pills.
    • Those who have feeding tubes can also use the liquid. Flush the feeding tube before and after medicine is given.
    • Injection:
    • This medicine is given as a shot into a muscle or vein.

    Missed Dose

    • Take a missed dose as soon as possible.
    • If it is almost time for the next dose, skip the missed dose and return to your regular schedule.
    • Do not take a double dose or extra doses.
    • The over-the-counter tablet can be taken on an as needed basis. Do not take more often than every 12 hours, unless instructed by healthcare provider.


    • Store at room temperature.
    • Protect from light.
    • Protect tablets from moisture. Do not store in a bathroom or kitchen.
    • The injection will be given to you in a healthcare setting. You will not store it at home.



    • This medicine does not mix well with some medicines. Serious reactions may occur. Check all medicines with healthcare provider.


    • If you have an allergy to ranitidine hydrochloride or any other part of this medicine.
    • Tell healthcare provider if you are allergic to any medicine. Make sure to tell about the allergy and how it affected you. This includes telling about rash; hives; itching; shortness of breath; wheezing; cough; swelling of face, lips, tongue, or throat; or any other symptoms involved.
    • If you have porphyria.


    • If you have kidney disease, talk with healthcare provider.
    • If you have PKU, talk with healthcare provider. Some products do contain phenylalanine.
    • Check medicines with healthcare provider. This medicine may not mix well with other medicines.
    • Talk with healthcare provider before using other: aspirin, aspirin-containing products, blood thinners, garlic, ginseng, ginkgo, ibuprofen or like products, pain medicines, or vitamin E.
    • Avoid alcohol (includes wine, beer, and liquor).
    • Tell healthcare provider if you are pregnant or plan on getting pregnant.
    • Tell healthcare provider if you are breast-feeding.

    Side Effects

    • Feeling dizzy. Rise slowly over several minutes from sitting or lying position. Be careful climbing.
    • Headache.
    • Diarrhea.
    • Constipation. More liquids, regular exercise, or a fiber-containing diet may help. Talk with healthcare provider about a stool softener or laxative.


    • Change in condition being treated. Is it better, worse, or about the same?

    Contact a healthcare provider

    • If you suspect an overdose, call your local poison control center or emergency department immediately.
    • Signs of a life-threatening reaction. These include wheezing; chest tightness; fever; itching; bad cough; blue skin color; fits; or swelling of face, lips, tongue, or throat.
    • Severe dizziness or passing out.
    • Significant change in thinking clearly and logically.
    • Chest pain or pressure or fast heartbeat.
    • Unusual bruising or bleeding.
    • Any rash.
    • No improvement in condition or feeling worse.

    General Statements

    • If you have a life-threatening allergy, wear allergy identification at all times.
    • Do not share your medicine with others and do not take anyone else's medicine.
    • Keep all medicine out of the reach of children and pets.
    • Most medicines can be thrown away in household trash after mixing with coffee grounds or kitty litter and sealing in a plastic bag.
    • In Canada return any unused drugs back to the pharmacy. Also, visit for more facts about the right way to get rid of unused drugs.
    • Keep a list of all your medicines (prescription, natural products, supplements, vitamins, over-the-counter) with you. Give this list to healthcare provider (doctor, nurse, nurse practitioner, pharmacist, physician assistant).
    • Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088 or in Canada to Health Canada's Canada Vigilance Program at 1-866-234-2345.
    • Talk with healthcare provider before starting any new medicine, including over-the-counter, natural products, or vitamins.

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    • Copyright © 1978-2010 Lexi-Comp Inc. All rights reserved.

    Copyright © 2011 Natural Standard (

    The information in this monograph is intended for informational purposes only, and is meant to help users better understand health concerns. Information is based on review of scientific research data, historical practice patterns, and clinical experience. This information should not be interpreted as specific medical advice. Users should consult with a qualified healthcare provider for specific questions regarding therapies, diagnosis and/or health conditions, prior to making therapeutic decisions.

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