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    Related terms
    • U.S. Brand Names: Biaxin®;Biaxin® XL
    • Canadian Brand Names: Apo-Clarithromycin®;Biaxin®;Biaxin® XL;Dom-Clarithromycin;Mylan-Clarithromycin;PMS-Clarithromycin;RANT-Clarithromycin;ratio-Clarithromycin;Riva-Clarithromycin;Sandoz-Clarithromycin
    • Mexican Brand Names: Adel;Gervaken;Klaricid ;Klarmyn;Krobicin;Neo-Clarosip;Rolicytin
    • Pharmacologic Category: Antibiotic, Macrolide

    • It is used to stop infections of the heart for patients with a higher chance of infection.
    • It is used to treat bacterial infections.
    • Clarithromycin works to harm the bacteria and fight the infection.


    How to take

    • To gain the most benefit, do not miss doses.
    • Use as told, even if feeling better.
    • Take liquid (suspension) or tablets with or without food. Take with food if it causes an upset stomach.
    • Take long-acting products with food. Swallow whole. Do not chew, break, or crush.
    • There is a liquid (suspension) if you cannot swallow pills. Shake well before use.
    • Those who have feeding tubes can also use the liquid. Flush the feeding tube before and after this drug is given.

    Missed Dose

    • Take a missed dose as soon as you think about it.
    • If it is close to time for the next dose, skip the missed dose and return to your normal time.
    • Do not take two doses or extra doses.


    • Store at room temperature.
    • Protect from light.
    • Protect granules and tablets from water. Do not store in a bathroom or kitchen.
    • Store liquid (suspension) at room temperature. Throw away any part not used after 2 weeks.



    • Unsafe reactions may happen. This drug cannot be taken while you are taking certain other drugs. Check all the drugs you are taking with your doctor.


    • If you have an allergy to clarithromycin or any other part of this drug.
    • Tell 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 involved.
    • If this drug caused liver problems before.
    • Long-acting products: If you have a narrowing of the GI (gastrointestinal) tract or a bowel block.


    • Check all drugs you are taking with your doctor. This drug may not mix well with certain other drugs.
    • If you have myasthenia gravis, talk with doctor.
    • If you have kidney disease, talk with doctor.
    • Avoid grapefruit and grapefruit juice.
    • Tell doctor if you are pregnant or plan on getting pregnant.
    • Tell doctor if you are breast-feeding.

    Side Effects

    • Long-acting tablet shell in the stool.
    • Belly pain.
    • Bad taste.
    • Upset stomach or throwing up. Small frequent meals, frequent mouth care, sucking hard, sugar-free candy, or chewing sugar-free gum may help.
    • Loose stools. Yogurt, Bifidobacterium bifidum, or Lactobacillus acidophilus may help. You can get these products at health food stores or in some pharmacies.


    • Change in health problem 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 ER right away.
    • Signs of a very bad reaction to the drug. These include wheezing; chest tightness; fever; itching; bad cough; blue skin color; seizures; or swelling of face, lips, tongue, or throat.
    • Very upset stomach or throwing up.
    • Very bad loose stools, even after drug is stopped.
    • Fast heartbeat.
    • Not able to eat.
    • Feeling very tired or weak.
    • Very bad belly pain.
    • Dark urine or yellow skin or eyes.
    • Any rash.
    • Health problem is not better or you are feeling worse.

    General Statements

    • If you have a very bad allergy, wear 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 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 drugs (prescription, natural products, supplements, vitamins, OTC) with you. Give this list to your doctor.
    • Call your doctor for health help about side effects. You may also call the FDA at 1-800-FDA-1088 or in Canada to Health Canada's Canada Vigilance Program at 1-866-234-2345.
    • Talk with doctor before starting any new drug, including OTC, natural products, or vitamins.

    Author information
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    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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