HOW TO USE: Hydroxychloroquine is usually taken with food or milk to prevent stomach upset. The dosage and length of treatment are based on your medical condition and response to therapy. In children, dosage is also based on weight. For malaria prevention, take this medication by mouth once a week on the same day of the week, or as directed by your doctor. Mark a calendar to help you remember. This drug is usually started 2 weeks before entering the area with malaria. Take it once weekly while in the area, and continue taking it for 4 to 8 weeks after leaving the area or as directed by your doctor. To treat malaria, follow your doctor's instructions.For lupus or rheumatoid arthritis, take this medication by mouth, usually once or twice daily or as directed. Your doctor may gradually increase your dose. Once you have been taking the medication for a while and your condition has improved, your doctor may instruct you to lower your dose until you find the dose that works best with the fewest side effects.Use this medication regularly in order to get the most benefit from it. If you are taking it on a daily schedule, take it at the same time each day. Take this medication exactly as prescribed. Do not stop taking it without talking with your doctor, especially if you are taking it for malaria. It is important to continue taking this for the length of time prescribed. Stopping prevention or treatment too soon may lead to infection or a return of the infection.Inform your doctor if your condition persists or worsens. It may take several weeks or months to see improvement if you are taking this for lupus or arthritis. Hydroxychloroquine may not prevent malaria in all cases. If you experience fever or other symptoms of illness, seek immediate medical attention. You may need a different medication. Avoid exposure to mosquitoes. (See also Notes section.)
SIDE EFFECTS: Nausea, stomach cramps, loss of appetite, diarrhea, dizziness, or headache may occur. If any of these effects persist or worsen, notify your doctor or pharmacist promptly.Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.Tell your doctor immediately if any of these unlikely but serious side effects occur: arm/leg/back pain, fast heartbeat, hair loss/color change, mental/mood changes (e.g., anxiety, depression, hallucinations), ringing in the ears/hearing loss, worsening of skin conditions (e.g., psoriasis).This medication may infrequently cause serious (sometimes permanent) eye problems or muscle damage, especially if you take it for a long time. Seek immediate medical attention if any of these unlikely but very serious side effects occur: sensitivity to light, vision changes (e.g., blurred vision, seeing light flashes/streaks/halos, missing/blacked-out areas of vision), muscle weakness.Tell your doctor immediately if any of these rare but very serious side effects occur: severe stomach/abdominal pain, severe nausea/vomiting, easy bleeding/bruising, signs of infection (e.g., fever, persistent sore throat), seizures, shortness of breath, swelling ankles/feet, extreme tiredness, dark urine, yellowing eyes/skin.A very serious allergic reaction is unlikely, but seek immediate medical attention if it occurs. Symptoms of a serious allergic reaction may include: rash, itching/swelling (especially of the face/tongue/throat), dizziness, trouble breathing.This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.In the US -Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.
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