Clarithromycin is a macrolide antibiotic. It fights bacteria in your body.

Clarithromycin is used to treat many different types of bacterial infections affecting the skin and respiratory system. It is also used together with other medicines to treat stomach ulcers caused by Helicobacter pylori.

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  • Biaxin, Biaxin XL, Biaxin XL-Pak
  • Less common
    fever or chills
    lower back or side pain
    painful or difficult urination
    Abdominal or stomach tenderness
    fever with or without chills
    nausea and vomiting
    severe abdominal or stomach cramps and pain
    shortness of breath
    skin rash and itching
    unusual bleeding or bruising
    watery and severe diarrhea, which may also be bloody
    yellow eyes or skin
    Incidence not known
    Abdominal or stomach pain
    black, tarry stools
    blistering, peeling, or loosening of the skin
    blurred vision
    chest pain or discomfort
    clay-colored stools
    confusion about identity, place, and time
    cool, pale skin
    dark urine
    difficulty with swallowing
    fast, pounding, or irregular heartbeat or pulse
    feeling of unreality
    feeling that others are watching you or controlling your behavior
    feeling that others can hear your thoughts
    feeling, seeing, or hearing things that are not there
    increased hunger
    irregular heartbeat
    joint or muscle pain
    light-colored stools
    loss of appetite
    puffiness or swelling of the eyelids or around the eyes, face, lips, or tongue
    recurrent fainting
    red skin lesions, often with a purple center
    red, irritated eyes
    redness, swelling, or soreness of the tongue
    sense of detachment from self or body
    severe mood or mental changes
    slow heartbeat
    slurred speech
    sore throat
    sores, ulcers, or white spots in the mouth or on the lips
    sudden death
    swollen glands
    tightness in the chest
    unpleasant breath odor
    unusual behavior
    unusual tiredness or weakness
    vomiting of blood
    Severity: Minor
    Some of the side effects that can occur with clarithromycin may not need medical attention. As your body adjusts to the medicine during treatment these side effects may go away. Your health care professional may also be able to tell you about ways to reduce or prevent some of these side effects. If any of the following side effects continue, are bothersome or if you have any questions about them, check with your health care professional:

    Less common
    Acid or sour stomach
    bloated or full feeling
    change in sensation of taste
    diarrhea (mild)
    excess air or gas in the stomach or intestines
    passing gas
    stomach discomfort, upset, or pain
    Incidence not known
    Alterations of sense of smell
    continuing ringing or buzzing or other unexplained noise in the ears
    feeling of constant movement of self or surroundings
    hearing loss
    mental depression
    mood or mental changes
    sensation of spinning
    shakiness in the legs, arms, hands, or feet
    skin eruptions
    sore mouth or tongue
    swelling or inflammation of the mouth
    taste loss
    tongue discoloration
    tooth discoloration
    trouble sleeping
    unable to sleep
    weight loss
  • (oral tablet, oral powder for reconstitution, oral tablet, extended release)
  • Bacterial Infection

    Treating certain bacterial infections. It may be used in combination with other medicines to treat acne or certain amoeba infections. It may be used to prevent certain types of malaria in travelers who will be visiting malaria-infected areas for less than 4 months. It may also be used to prevent or slow the progression of anthrax after exposure. Doryx delayed-release capsules are a tetracycline antibiotic. It works by slowing the growth of bacteria. Slowing the bacteria's growth allows the body's immune system to destroy the bacteria.