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. How does plaquenil affect eyes Visual prolem with plaquenil 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. Two days now I've taken the Pepcid, then an hour later took the Plaquenil and it's working great. I didn't even eat this morning and didn't have a problem. BTW I talked to two pharmacists and both said that it's okay to take with the plaquenil. Plaquenil Side Effects by Likelihood and Severity INFREQUENT side effects. If experienced, these tend to have a Severe expression. A Disorder Of The Retina Of The Eye; 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. Plaquenil and b12 Plaquenil What You Need to Know - Kaleidoscope Fighting Lupus, Plaquenil and Pepcid - Stomach digestion meditcation plaquenilRecommended dosage hydroxychloroquineOct hydroxychloroquine retinopathyPlaquenil eye exam protocol report form Dosage for Plaquenil. The adult dose of Plaquenil to suppress malaria is 400 mg on the same day each week. The pediatric weekly suppressive dosage is 5 mg/kg of body weight. The adult dose of Plaquenil to treat an acute attack of malaria is an initial dose of 800 mg followed by 400 mg in six to eight hours and 400 mg for two more days. Side Effects of Plaquenil Hydroxychloroquine, Warnings, Uses. Common and Rare Side Effects for Plaquenil Oral. Hydroxychloroquine Oral Route Side Effects - Mayo Clinic. Hydroxychloroquine may improve symptoms of rheumatoid arthritis symptoms in roughly half a year. If you use this medication and your symptoms don’t improve in that time window, or if they get worse, experts at the National Institutes of Health recommend that you discontinue the medication and call your physician. Vitamin B12 deficiency causes various neuropsychiatric problems ranging from neuropathy to dementia in the elderly. Vitamin B12 deficiency is found to cause neurological and psychiatric problems in adults between 40–90 years of age. It rarely affects people younger than this. Find patient medical information for Plaquenil Oral on WebMD including its uses, side effects and safety, interactions, pictures, warnings and user ratings.