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Related terms
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    Related terms
    • Brand Names: U.S.: Zantac 150® [OTC];Zantac 75® [OTC];Zantac®;Zantac® EFFERdose®
    • Brand Names: Canada: Acid Reducer;Apo-Ranitidine®;CO Ranitidine;Dom-Ranitidine;Myl-Ranitidine;Mylan-Ranitidine;Nu-Ranit;PHL-Ranitidine;PMS-Ranitidine;Ranitidine Injection, USP;RANT-Ranitidine;ratio-Ranitidine;Riva-Ranitidine;Sandoz-Ranitidine;ScheinPharm Ranitidine;Teva-Ranitidine;Zantac 75®;Zantac Maximum Strength Non-Prescription;Zantac®

    • It is used to treat gastroesophageal reflux disease.
    • It is used to stop or treat GI (gastrointestinal) ulcers caused by infection.
    • It is used to treat heartburn and sour stomach.
    • It is used to treat syndromes caused by lots of stomach acid.
    • Ranitidine helps avoid harm to the GI (gastrointestinal) tract caused by stomach acid or infection.


    How to take

    • Oral:
    • Take with or without food. Take with food if it causes an upset stomach.
    • Take at bedtime if you are taking once a day.
    • Drop the effervescent tablet in 1 teaspoon (5 mL) of water. Drink it when it melts.
    • There is a liquid (syrup) if you cannot swallow pills.
    • Those who have feeding tubes may also use the liquid. Flush the feeding tube before and after this drug is given.
    • Shot:
    • It is given as a shot into a muscle or vein.

    Missed Dose

    • Oral:
    • Take a missed dose as soon as you think about it.
    • If it is close to the time for your next dose, skip the missed dose and go back to your normal time.
    • Do not take 2 doses at the same time or extra doses.
    • The OTC tablet may be taken on an as needed basis. Do not take more often than every 12 hours unless told to do so by your doctor.


    • Oral:
    • Store at room temperature.
    • Protect from light.
    • Protect tablets from water. Do not store in a bathroom or kitchen.
    • Shot:
    • The shot will be given to you in a hospital or doctor's office. You will not store it at home.



    • Sometimes drugs are not safe when you take them with certain other drugs. Taking them together can cause bad side effects. This is one of those drugs. Be sure to talk to your doctor about all the drugs you take.


    • If you have an allergy to ranitidine hydrochloride or any other part of this drug.
    • Tell your doctor if you are allergic to any drugs. Make sure to tell about the allergy and what signs you had. This includes telling about rash; hives; itching; shortness of breath; wheezing; cough; swelling of face, lips, tongue, or throat; or any other signs.
    • If you have porphyria.


    • If you have kidney disease, talk with your doctor.
    • If you have PKU, talk with your doctor. Some products have phenylalanine.
    • Check all drugs you are taking with your doctor. This drug may not mix well with some other drugs.
    • Keep a list of all your drugs (prescription, natural products, vitamins, OTC) with you. Give this list to your doctor.
    • Talk with your doctor before using products that have aspirin, blood thinners, garlic, ginseng, ginkgo, ibuprofen or like products, pain drugs, or vitamin E.
    • Avoid beer, wine, or mixed drinks.
    • Tell your doctor if you are pregnant or plan on getting pregnant.
    • Tell your doctor if you are breast-feeding.

    Side Effects

    • Feeling dizzy. Rise slowly over a few minutes when sitting or lying down. Be careful climbing.
    • Headache.
    • Hard stools (constipation). Drinking more liquids, working out, or adding fiber to your diet may help. Talk with your doctor about a stool softener or laxative.
    • Loose stools (diarrhea).

    Contact a healthcare provider

    • If you think there was an overdose, call your local poison control center or ER right away.
    • Signs of a very bad reaction to the drug. These include wheezing; chest tightness; fever; itching; bad cough; blue or gray skin color; seizures; or swelling of face, lips, tongue, or throat.
    • Very bad dizziness or passing out.
    • Change in thinking clearly and with logic.
    • Chest pain or pressure or a fast heartbeat.
    • Any bruising or bleeding.
    • Any rash.
    • Side effect or health problem is not better or you are feeling worse.

    General Statements

    • If you have a very bad allergy, wear an allergy ID at all times.
    • Do not share your drugs with others and do not take anyone else's drugs.
    • Keep all drugs out of the reach of children and pets.
    • Most drugs may be thrown away in household trash after mixing with coffee grounds or kitty litter and sealing in a plastic bag.
    • In Canada, take any unused drugs to the pharmacy. Also, visit http://www.hc-sc.gc.ca/hl-vs/iyh-vsv/med/disposal-defaire-eng.php#th to learn about the right way to get rid of unused drugs.
    • Keep a list of all your drugs (prescription, natural products, vitamins, OTC) with you. Give this list to your doctor.
    • Call your doctor for help with any side effects. If in the U.S., you may also call the FDA at 1-800-FDA-1088 or if in Canada, you may also call Health Canada's Vigilance Program at 1-866-234-2345.
    • Talk with the doctor before starting any new drug, including OTC, natural products, or vitamins.

    Author information
    • Copyright © 1978-2013 Lexi-Comp Inc. All rights reserved.

    Copyright © 2011 Natural Standard (www.naturalstandard.com)

    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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