Norfloxacin is an antibiotic in a group of drugs called fluoroquinolones (flor-o-KWIN-o-lones). Norfloxacin fights bacteria in the body.

Norfloxacin is used to treat different bacterial infections of the prostate or urinary tract (bladder and kidneys). Norfloxacin is also used to treat gonorrhea.

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  • Noroxin
  • Rare
    Chest pain or discomfort
    fast, irregular, pounding, or racing heartbeat or pulse
    feeling sad or empty
    flushing or redness of the skin
    hives or welts
    increased sweating
    irritation or soreness of the mouth
    itching of the rectal area
    itching skin
    lack of appetite
    loss of interest or pleasure
    pain and inflammation at the joints
    pain or discomfort in the arms, jaw, back, or neck
    redness of the skin
    shortness of breath
    skin rash
    swelling of the foot or hand
    swelling of the stomach
    tingling of the fingers
    trouble with concentrating
    trouble with sleeping
    unusually warm skin
    Incidence not known
    Abdominal or stomach cramps or tenderness
    back, leg, or stomach pains
    black, tarry stools
    bleeding gums
    blistering, peeling, or loosening of the skin
    blood in the urine or stools
    blurred vision
    bone pain
    burning, crawling, itching, numbness, prickling, "pins and needles", or tingling feelings
    clay-colored stools
    cold sweats
    cool, pale skin
    cough or hoarseness
    cracks in the skin
    dark-colored urine
    decreased frequency or amount of urine
    diarrhea, watery and severe, which may also be bloody
    difficulty with breathing, chewing, swallowing, or talking
    difficulty with moving
    dizziness, faintness, or lightheadedness when getting up suddenly from a lying or sitting position
    double vision
    drooping eyelids
    dry mouth
    dry skin
    false sense of well-being
    fever with or without chills
    fruit-like breath odor
    general body swelling
    general feeling of tiredness or weakness
    greatly decreased frequency of urination or amount of urine
    inability to move the arms and legs
    increased blood pressure
    increased hunger
    increased sensitivity of the skin to sunlight
    increased thirst
    increased urination
    irregular or slow heart rate
    large, hive-like swelling on the face, eyelids, lips, tongue, throat, hands, legs, feet, or sex organs
    light-colored stools
    loss of heat from the body
    lower back or side pain
    mood or mental changes
    mood swings
    muscle aching or cramping
    muscle pain or stiffness
    muscle weakness
    numbness or tingling in the hands, feet, or lips
    pain or burning while urinating
    pain, inflammation, or swelling in the calves, shoulders, or hands
    pain, swelling, or redness in the joints
    painful or difficult urination
    pains in the stomach, side, or abdomen, possibly radiating to the back
    personality changes
    pinpoint red spots on the skin
    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 sunburn
    severe tiredness
    shakiness and unsteady walk
    skin rash
    slurred speech
    sore throat
    sores, ulcers, or white spots on the lips or in the mouth
    sores, welting, or blisters
    stomach pain, continuing
    sudden decrease in the amount of urine
    sudden numbness and weakness in the arms and legs
    swelling of the face, fingers, or lower legs
    swelling or inflammation of the mouth
    swollen glands
    tightness in the chest
    unexplained weight loss
    unpleasant breath odor
    unsteadiness, awkwardness, trembling, or other problems with muscle control or coordination
    unusual behavior, such as disorientation to time or place, failure to recognize people, hyperactivity, or restlessness
    unusual bleeding or bruising
    unusual tiredness or weakness
    unusual weight loss
    vomiting of blood
    weakness in the arms, hands, legs, or feet
    weight gain
    yellowing of the eyes or skin
    Some norfloxacin side effects may not need any medical attention. As your body gets used to the medicine these side effects may disappear. Your health care professional may be able to help you prevent or reduce these side effects, but do check with them if any of the following side effects continue, or if you are concerned about them:

    Less common
    Lack or loss of strength
    Acid or sour stomach
    bitter taste
    excess air or gas in the stomach or intestines
    full feeling
    heavy bleeding
    passing gas
    sleepiness or unusual drowsiness
    stomach discomfort, upset, or pain
    unable to sleep
    weight loss
    Incidence not known
    Change in taste
    continuing ringing or buzzing or other unexplained noise in the ears
    hearing loss
    itching of the vagina or outside genitals
    loss of taste
    pain during sexual intercourse
    seeing double
    thick, white curd-like vaginal discharge without odor or with mild odor
    uncontrolled eye movements
  • (oral tablet)
  • 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.