Cefdinir is in a group of drugs called cephalosporin (SEF a low spor in) antibiotics. It works by fighting bacteria in your body.

Cefdinir is used to treat many different types of infections caused by bacteria.

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  • Omnicef, Omnicef Omni-Pac
  • More common
    Black, tarry stools
    chest pain
    painful or difficult urination
    shortness of breath
    sore throat
    sores, ulcers, or white spots on the lips or in the mouth
    swollen glands
    unusual bleeding or bruising
    unusual tiredness or weakness
    Incidence not known
    Abdominal or stomach cramps or tenderness
    back, leg, or stomach pains
    bleeding gums
    blistering, peeling, or loosening of the skin
    blood in the urine or stools
    bloody nose
    bloody or cloudy urine
    bloody, black, or tarry stools
    blue lips, fingernails, or skin
    chest pain or discomfort
    clay-colored stools
    cold, clammy skin
    coughing or vomiting blood
    cracks in the skin
    dark-colored urine
    diarrhea, watery and severe, which may also be bloody
    difficult or troubled breathing
    difficulty with breathing or swallowing
    dilated neck veins
    extreme fatigue
    fast heartbeat
    fast, weak pulse
    feeling of discomfort
    general body swelling
    general tiredness and weakness
    heavier menstrual periods
    high fever
    increased thirst
    inflammation of the joints
    irregular breathing
    irregular heartbeat
    irregular, fast or slow, or shallow breathing
    joint or muscle pain
    light-colored stools
    loss of appetite
    loss of consciousness
    loss of heat from the body
    muscle aches
    muscle cramps or spasms
    muscle pain or stiffness
    nausea or vomiting
    noisy breathing
    pain in the ankles or knees
    pain or discomfort in the arms, jaw, back, or neck
    painful, red lumps under the skin, mostly on the legs
    pale skin
    persistent bleeding or oozing from puncture sites, mouth, or nose
    pinpoint red spots on the skin
    problems with bleeding or clotting
    puffiness or swelling of the eyelids or around the eyes, face, lips, or tongue
    red skin lesions, often with a purple center
    red, irritated eyes
    red, swollen skin
    scaly skin
    severe stomach pain
    slow or irregular breathing
    sudden decrease in the amount of urine
    swelling of the face, fingers, feet, or lower legs
    swollen lymph glands
    tightness in the chest
    unpleasant breath odor
    unusual weight loss
    upper right abdominal or stomach pain
    vomiting of blood
    weight gain
    yellow eyes or skin
    Severity: Minor
    Some of the side effects that can occur with cefdinir 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
    Itching of the vagina or genital area
    pain during sexual intercourse
    thick, white vaginal discharge with no odor or with a mild odor
    vaginal yeast infection
    Acid or sour stomach
    dry mouth
    excess air or gas in the stomach or intestines
    full feeling
    increase in body movements
    increased clear or white vaginal discharge
    lack or loss of strength
    passing gas
    rash with flat lesions or small raised lesions on the skin
    sleepiness or unusual drowsiness
    soreness or redness around the fingernails and toenails
    stomach discomfort, upset, or pain
    unable to sleep
    Incidence not known
    Burning, dry, or itching eyes
    discharge, excessive tearing
    redness, pain, or swelling of the eye, eyelid, or inner lining of the eyelid
    swelling or inflammation of the mouth
  • (oral capsule, oral powder for reconstitution)
  • 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.