Although not all of these side effects may occur, if they do occur they may need medical attention. Check with your doctor immediately if any of the following side effects occur while taking hydroxychloroquine: Incidence not known Some side effects of hydroxychloroquine may occur that usually do not need medical attention. Plaquenil safer than floroquinolones Plaquenil diagnosis Plaquenil lichen planus Plaquenil is the brand name for the prescription drug hydroxychloroquine. It's used to treat and prevent malaria infection, and to reduce symptoms and progression of autoimmune diseases such as. Hydroxychloroquine oral tablet is available as a brand-name drug and a generic drug. Brand name Plaquenil. Hydroxychloroquine comes only as a tablet you take by mouth. Hydroxychloroquine is used to treat malaria, lupus erythematosus, and rheumatoid arthritis. Side Effects. Drug information provided by IBM Micromedex 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. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. These side effects may go away during treatment as your body adjusts to the medicine. Plaquenile alcohol Will you have Alcohol interaction with Plaquenil - eHealthMe, Hydroxychloroquine Side Effects, Dosage, Uses, and More Chloroquine phosphate usesHow is hydroxychloroquine takedChloroquine treatment autophagy Medical usesHistorySide effectsMechanism of actionResultsAdministrationRisksDiagnosisInteractionsPreventionBenefits Taking Plaquenil for Rheumatoid Arthritis. Hydroxychloroquine Oral Route Side Effects - Mayo Clinic. Plaquenil hydroxychloroquine sulfate dose, indications.. Tell your doctor if you have or have ever had liver disease, psoriasis, porphyria or other blood disorders, G-6-PD deficiency, dermatitis skin inflammations, or if you drink large amounts of alcohol. tell your doctor if you have ever had vision changes while taking hydroxychloroquine, chloroquine Aralen, or primaquine. Low blood sugar has happened with hydroxychloroquine. Sometimes, this has been very bad and could be life-threatening. Talk with the doctor. Check your blood sugar as you have been told by your doctor. Talk with your doctor before you drink alcohol. Low blood cell counts have happened with hydroxychloroquine. Plaquenil hydroxychloroquine is an antimalarial medication used to treat or prevent malaria, a disease caused by parasites, which enter the body through the bite of a mosquito. Plaquenil is also used to treat symptoms of rheumatoid arthritis and discoid or systemic lupus erythematosus.