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Chloroquine phosphate oral

Important Note

The following information is intended to supplement, not substitute for, the expertise and judgment of your physician, pharmacist or other healthcare professional. It should not be construed to indicate that use of the drug is safe, appropriate, or effective for you. Consult your healthcare professional before using this drug.





This medication is used to prevent and treat malaria. Is also used to treat certain infections of the intestinal tract and certain types of skin problems.

How To Use

Take this medication with food to prevent stomach upset. Take this medication exactly as prescribed. Do not stop taking it without consulting your doctor. It is important to continue taking this for the length of time prescribed. Stopping therapy too soon may not treat the infection and can lead to re-infection. While taking this medication, your doctor may schedule lab tests to check your eye sight, hearing and blood.

Side Effects

Nausea, vomiting, stomach upset, cramps, loss of appetite, diarrhea, tiredness, weakness or headache may occur the first several days as your body adjusts to the medication. If these effects continue or become bothersome, inform your doctor. Tell your doctor immediately if any of these serious side effects occur: blurred vision, trouble seeing at night or problems focusing clearly, ringing in the ears, difficulty hearing. Tell your doctor immediately if any of these unlikely but serious side effects occur: seizures, mental/mood changes. Tell your doctor immediately if any of these highly unlikely but very serious side effects occur: fainting, irregular heartbeat, persistent sore throat or fever, easy bleeding or bruising. A serious allergic reaction to this drug is unlikely, but seek immediate medical attention if it occurs. Symptoms of a serious allergic reaction include: rash, itching, swelling, dizziness, trouble breathing. If you notice other effects not listed above, contact your doctor or pharmacist.


Tell your doctor your medical history, especially of: liver disease, blood disorders, psoriasis, a certain metabolic disease (glucose-6-phosphate dehydrogenase-G6PD deficiency), hearing problems, seizures. This drug should be used only if clearly needed during pregnancy. Since small amounts of this medication are found in breast milk, consult your doctor before breast-feeding.

Drug Interactions

Tell your doctor of any other medication you may take (including nonprescription), especially: ampicillin, antacids, cimetidine, cyclosporine, kaolin, magnesium trisilicate. Do not start or stop any medicine without doctor or pharmacist approval.


If overdose is suspected, contact your local poison control center or emergency room immediately. Symptoms of overdose may include headache, drowsiness, visual disturbances, nausea, vomiting, and seizures.


Children are very sensitive to the effects of this medication. It is important to keep this and all medications out of the reach of children.

Missed Dose

If you miss a dose, take as soon as remembered; do not take if it is almost time for the next dose, instead, skip the missed dose and resume your usual dosing schedule. Do not "double-up" the dose to catch up.


Store at room temperature away from sunlight and moisture.