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 primaquine Chloroquine phosphate humblefish What is chloroquine used for in cell biology Common side effects may include headache, dizziness, ringing in your ears; nausea, vomiting, stomach pain; loss of appetite, weight loss; mood changes, feeling nervous or irritable; skin rash or itching; or. hair loss. Plaquenil side effects Get emergency medical help if you have signs of an allergic reaction to Plaquenil hives; difficulty breathing; swelling of your face, lips, tongue, or throat. Taking Plaquenil long-term or at high doses may cause irreversible damage to the retina of your eye. If you're taking Plaquenil for an autoimmune condition, your symptoms should begin to improve after a few months, but it can take up to six months for full effects. 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. How long do side effects of plaquenil last PLAQUENIL Side Effects, Reviews by Patients -, Plaquenil Uses, Dosage & Side Effects - Does chloroquine increase the effects of digoxinCommon ingredients of chloroquineCuando parar la hydroxychloroquine What are the side effects of Plaquenil? The most common side effects are diarrhea, nausea, vomiting, headache, dizziness, skin rash or black spots when you look at things. Most side effects will go away when your body gets used to the medicine. Tell your doctor if you have these side effects. A lower dose may stop them. Do not lower the dose on. Lupus Medicines Hydroxychloroquine - Brigham and Women's.. Plaquenil Hydroxychloroquine - Side Effects, Dosage.. Will you have Withdrawal syndrome with Plaquenil - eHealthMe. With Plaquenil, however, the most commonly prescribed anti-malarial, this sort of damage occurs only in 1 out of 5,000 people who take the drug for five years or more. For this reason though, it is important that you see an ophthalmologist for an exam before starting to take an anti-malarial medication for your lupus. Children should not take hydroxychloroquine for long-term therapy. Keep all appointments with your doctor and the laboratory. Your doctor may order certain lab tests to check your response to hydroxychloroquine. If you are taking hydroxychloroquine for a long period of time, your doctor will recommend frequent eye exams. SIDE EFFECTS. The following adverse reactions have been identified during post-approval use of PLAQUENIL or other 4-aminoqunoline compounds. Because these reactions are reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate their frequency or establish a causal relationship to drug exposure.