Hydroxychloroquine (Systemic)

Brand Names : Plaquenil

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 or any other change in vision - this side effect may also occur or get worse after you stop taking this medicine

Rare

Convulsions (seizures); increased muscle weakness; mood or other mental changes; ringing or buzzing in ears or any loss of hearing; sore throat and fever; unusual bleeding or bruising; unusual tiredness; 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; dizziness or lightheadedness; nervousness or restlessness; skin rash

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