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. Chloroquine does not inhibit dna synthesis Do you need to take pain meds with plaquenil Plaquenil side effects antimalarial Does hydroxychloroquin cause low wbc Some people taking this medication over long periods of time or at high doses have developed irreversible damage to the retina of the eye. Stop taking hydroxychloroquine and call your doctor at once if you have trouble focusing, if you see light streaks or flashes in your vision, or if you notice any swelling or color changes in your eyes. Hydroxychloroquine is usually taken with food or milk to prevent stomach upset. The dosage and length of treatment are based on your medical condition and response to therapy. In children, dosage. Fortunately, the problems seen by people taking this medication are usually very mild. Serious side effects are rare. Overall, most people who have any noticeable side effects from hydroxychloroquine experience diarrhea or nausea. These usually get better after the person adjusts to the medication, and taking the drug with food can help, as well. 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. Can hydroxychloroquine be taken with cholesterol-lowering medications Plaquenil, Plaquenil Sulfate, Quineprox hydroxychloroquine., Hydroxychloroquine Oral Uses, Side Effects, Interactions. Chloroquine aralen drug cardPrimaquine chloroquine interactionChloroquine production processPlaquenil mastocytosisPlaquenil and immune system This is difficult to demonstrate since blood levels of most of our medications are not available. We used vitamin D levels as a surrogate marker for other medications although hydroxychloroquine can influence Vitamin D metabolism42, 43. There was a strong correlation between increasing vitamin D levels and blood hydroxychloroquine levels. Hydroxychloroquine Blood Levels in SLE Clarifying dosing.. RA and Hydroxychloroquine How Effective is it for Rheumatoid.. Drug spotlight on hydroxychloroquine Lupus Foundation of.. Hydroxychloroquine can be taken with a glass of milk or a meal to decrease nausea. Follow the directions on your prescription label carefully, and ask your doctor or pharmacist to explain any part you do not understand. Take hydroxychloroquine exactly as directed. Do not take more or less of it or take it more often than prescribed by your doctor. Before using hydroxychloroquine, tell your doctor or pharmacist of all the drugs you take and if you have any of the following conditions certain heart problems heart failure, slow heartbeat, QT. Plaquenil hydroxychloroquine is an effective medication for autoimmune conditions and malaria that comes with less side effects than other DMARDs. Effectively prevents and treats malaria, and treats a certain type of intestinal infection but can cause serious side effects in certain people.