Precautions Check with your doctor immediately if blurred vision, difficulty in reading, or any other change in vision occurs during or after long-term treatment . Hydroxychloroquine may cause blurred vision, difficulty in reading, or other change in vision. It may also cause some people to become dizzy or lightheaded. Make sure you know how you react to this medicine before you drive, use machines, or do anything else that could be dangerous if you are dizzy or are not alert or able to see well . If these reactions are especially bothersome, check with your doctor.
Malaria is spread by mosquitoes.
Wear long-sleeved shirts or blouses and long trousers to protect your arms and legs, especially from dusk through dawn when mosquitoes are out. Apply mosquito repellent to uncovered areas of the skin from dusk through dawn when mosquitoes are out. 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.