Treating and suppressing acute attacks of certain strains of malaria and a certain type of parasitic infection (extraintestinal amebiasis). It may also be used for other conditions as determined by your doctor.

Aralen tablets are an aminoquinoline. It is thought to kill sensitive malaria parasites by stopping normal metabolism inside the parasite.

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  • Aralen
  • Severity: Major
    You should check with your doctor immediately if any of these side effects occur when taking chloroquine:

    Rare:
    Black, tarry stools
    bleeding gums
    blistering, peeling, or loosening of the skin
    blood in the urine or stools
    blurred vision
    chest pain
    chills
    confusion
    cough
    diarrhea
    difficulty with swallowing
    dizziness
    dizziness, faintness, or lightheadedness when getting up suddenly from a lying or sitting position
    fast heartbeat
    fever
    headache
    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
    sweating
    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
    drooling
    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
    restlessness
    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
    drowsiness
    dry mouth
    fainting
    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
    sweating
    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:

    Rare:
    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
  • (chloroquine phosphate) Tablets, USP