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Aralen Patient Information Including Side Effects

Brand Names: Aralen Phosphate

Generic Name: chloroquine (Pronunciation: KLOR oh kwin)

What is chloroquine (Aralen)?

Chloroquine is an antimalarial drug. The exact way that chloroquine works is unknown.

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

Chloroquine may also be used for purposes other than those listed in this medication guide.

Aralen 500 mg

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Chloroquine 250 mg-GLO

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Chloroquine 500 mg-GLO

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What are the possible side effects of chloroquine (Aralen)?

Stop taking chloroquine and seek emergency medical attention if you experience an allergic reaction (flushing; swelling of the lips, tongue, or face; difficulty breathing; closing of the throat; vision problems; rash; itching; or fever).

Other, less serious side effects may be more likely to occur. Continue to take chloroquine and talk to your doctor if you experience

  • visual disturbances such as blurred vision, misty vision, and difficulty focusing;
  • hearing loss or ringing in the ears;
  • diarrhea, nausea, stomach pain or upset, vomiting, or loss of appetite;
  • muscle weakness; or
  • a rash.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088. You may report side effects to FDA at 1-800-FDA-1088.

Read the Aralen (chloroquine) Side Effects Center for a complete guide to possible side effects

What is the most important information I should know about chloroquine (Aralen)?

Use caution when driving or performing other hazardous activities until you know how this medication affects you. Chloroquine may cause visual disturbances such as blurred vision, misty vision, and difficulty focusing. Report any vision or hearing changes to your doctor.

Side Effects Centers

Aralen - User Reviews

Aralen User Reviews

Now you can gain knowledge and insight about a drug treatment with Patient Discussions.

Here is a collection of user reviews for the medication Aralen sorted by most helpful. Patient Discussions FAQs

Report Problems to the Food and Drug Administration


You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.

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