It does not work against certain types of malaria (chloroquine-resistant). The United States Center for Disease Control provides updated guidelines and travel recommendations for the prevention and treatment of malaria in different parts of the world. Hydroxychloroquine blindnesd Can plaquenil cause eye redness Brazil nuts and plaquenil Drug Information on Plaquenil, Plaquenil Sulfate, Quineprox hydroxychloroquine includes side effects, uses, drug interactions, dosage, drug pictures, overdose symptoms, and what to avoid. Taking hydroxychloroquine long-term or at high doses may cause irreversible damage to the retina of your eye. 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. Chloroquine has been replaced with hydroxychloroquine as it has less side effects. Eye Exam Before Starting Treatment. If a person is going to be treated long-term with Plaquenil, they need to have a thorough dilated eye exam with best corrected visual acuity, central visual field, color vision, and dilated examination of the retina. This medication is also used, usually with other medications, to treat certain auto-immune diseases (lupus, rheumatoid arthritis) when other medications have not worked or cannot be used. Discuss the most recent information with your doctor before traveling to areas where malaria occurs. Long term effects of plaquenil sulfate Hydroxychloroquine Plaquenil, Plaquenil Oral Uses, Side Effects, Interactions. Plaquenil ful fielderg severeWhat is chloroquine made up ofHydroxychloroquine plaquenil mechanism of action Serious Side Effects of Plaquenil. If you are taking Plaquenil long-term, such as for an autoimmune condition, your doctor should regularly check you for potential serious side effects. Plaquenil Hydroxychloroquine - Side Effects, Dosage.. Plaquenil Hydroxychloroquine Side Effects and Adverse.. Plaquenil hydroxychloroquine Basics, Side Effects.. Find patient medical information for Plaquenil Oral on WebMD including its uses, side effects and safety, interactions, pictures, warnings and user ratings. BACKGROUND Hydroxychloroquine is used for the treatment of rheumatoid arthritis RA and systemic lupus erythematosus SLE. Long term studies have shown a high rate of termination of hydroxychloroquine treatment in patients with RA. Incidence not known. Continuing ringing or buzzing or other unexplained noise in the ears. feeling of constant movement of self or surroundings. irritability. nausea. nervousness. nightmares. sensation of spinning. shakiness and unsteady walk. uncontrolled eye movements. unsteadiness, trembling, or.