Chloroquine is a medication to treat or prevent malaria, a disease caused by parasites. This medicine works by interfering with the growth of parasites in the red blood cells of the human body.

Parasites that cause malaria typically enter the body through the bite of a mosquito. Malaria is common in areas such as Africa, South America, and Southern Asia.

Chloroquine is used to treat and to prevent malaria. Chloroquine is also used to treat infections caused by amoebae.

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  • Aralen Phosphate, Aralen Hydrochloride
  • Rare
    Black, tarry stools
    bleeding gums
    blistering, peeling, or loosening of the skin
    blood in the urine or stools
    blurred vision
    chest pain
    difficulty with swallowing
    dizziness, faintness, or lightheadedness when getting up suddenly from a lying or sitting position
    fast heartbeat
    joint or muscle pain
    large, hive-like swelling on the face, eyelids, lips, tongue, throat, hands, legs, feet, or sex organs
    lower back or side pain
    painful or difficult urination
    pale skin
    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
    skin rash, hives, or itching
    sore throat
    sores, ulcers, or white spots on the lips or in the mouth
    swollen or painful glands
    tightness in the chest
    unusual bleeding or bruising
    unusual tiredness or weakness
    Incidence not known
    Blurred vision or any other change in vision
    change in near or distance vision
    continuing ringing or buzzing or other unexplained noise in the ears
    dark urine
    difficulty in focusing the eyes
    difficulty with speaking
    disturbed color perception
    double vision
    general tiredness and weakness
    halos around lights
    hearing loss
    inability to move the eyes
    increased blinking or spasms of the eyelid
    light-colored stools
    loss of balance control
    muscle trembling, jerking, or stiffness
    muscular pain, tenderness, wasting, or weakness
    nausea and vomiting
    night blindness
    overbright appearance of lights
    shuffling walk
    sticking out of the tongue
    stiffness of the limbs
    trouble breathing
    tunnel vision
    twitching, twisting, or uncontrolled repetitive movements of the tongue, lips, face, arms, or legs
    uncontrolled movements, especially of the face, neck, and back
    upper right abdominal or stomach pain
    yellow eyes and skin
    If any of the following symptoms of overdose occur while taking chloroquine, get emergency help immediately:

    Symptoms of overdose
    Chest discomfort
    cold clammy skin
    decreased urine
    dry mouth
    fast, slow, or irregular heartbeat
    fast, weak pulse
    increased thirst
    lightheadedness, dizziness or fainting
    loss of appetite
    muscle pain or cramps
    numbness or tingling in the hands, feet, or lips
    Severity: Minor
    Some of the side effects that can occur with chloroquine 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:

    Change in hair color
    hair loss
    increased sensitivity of the skin to sunlight
    redness or other discoloration of the skin
    severe sunburn
    Incidence not known
    Abdominal or stomach cramps
    weight loss
  • (injectable solution, oral tablet, compounding powder)