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You are here : 3-RX.com > Drugs & Medications > Detailed Drug Information (USP DI) > Chloroquine : Side Effects

Chloroquine (Systemic)

Brand Names : Aralen, Aralen HCl

Chloroquine | Before Using | Proper Use | Precautions | Side Effects | Additional Information

Side Effects of This Medicine

Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention. When this medicine is used for short periods of time, side effects usually are rare. However, when it is used for a long time and/or in high doses, side effects are more likely to occur and may be serious.

Check with your doctor immediately if any of the following side effects occur:

    Less common

      Blurred vision; change in vision; eye pain; loss of vision


      The above side effects may also occur or get worse after you stop taking this medicine.


      Black, tarry stools; blood in urine or stools; convulsions (seizures); cough or hoarseness; feeling faint or lightheaded; fever or chills; increased muscle weakness; lower back or side pain; mood or other mental changes; painful or difficult urination; pinpoint red spots on skin; ringing or buzzing in ears or any loss of hearing; sore throat; unusual bleeding or bruising; unusual tiredness or weakness

    Symptoms of overdose

      Drowsiness; headache; increased excitability

Other side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. However, check with your doctor if any of the following side effects continue or are bothersome:

    More common

      Diarrhea; difficulty in seeing to read; headache; itching (more common in black patients); loss of appetite; nausea or vomiting; stomach cramps or pain

    Less common

      Bleaching of hair or increased hair loss; blue-black discoloration of skin, fingernails, or inside of mouth; skin rash

Other side effects not listed above may also occur in some patients. If you notice any other effects, check with your doctor.

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Chloroquine: Precautions


Chloroquine: Additional Information

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