It's used to treat and prevent malaria infection, and to reduce symptoms and progression of autoimmune diseases such as lupus, rheumatoid arthritis, and others. Malaria is spread by mosquitoes, which transmit the parasites that cause the infection, usually in tropical and subtropical parts of the world. Long term side effects hydroxychloroquine Hydroxychloroquine retinal deposits Re Plaquenil side effects. Plaquenil made me a bit nauseated in the beginning but that wnet away within a few weeks. You usually need to be on Plaquenil for a few mon ths for it to take effect. I have read several times that those going from brand name Plaquenil to generic have had problems, including flares. What are some other side effects of Plaquenil? All drugs may cause side effects. However, many people have no side effects or only have minor side effects. Call your doctor or get medical help if any of these side effects or any other side effects bother you or do not go away Dizziness. Headache. Feeling nervous and excitable. Not hungry. More common side effects. The more common side effects that can occur with hydroxychloroquine include headache; dizziness; diarrhea; stomach cramps; vomiting; Mild side effects may go away within. For example, it may be combined with an antibiotic to treat chronic Q-fever, which humans usually catch from farm animals or raw milk. Plaquenil is used to treat other types of infections too. Do side effects of plaquenil start right away Stopping Plaquenil - General Discussion - Life With Lupus, Plaquenil Indications, Side Effects, Warnings - Hydroxychloroquine plaquenil and alcoholChloroquine effect on gametocytesPlaquenil ear problemsNaltrexone and plaquenilPlaquenil dosage by weight Some side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Plaquenil Side Effects - GoodRx. Hydroxychloroquine Side Effects, Dosage, Uses, and More. Stopping plaquenil. DailyStrength. Sep 13, 2019 Some side effects of hydroxychloroquine may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Common Side Effects of Plaquenil. Tell your doctor if any of the following side effects, as they may be indications of a more serious reaction Headache; Loss of appetite; Dizziness; Nausea Tell your doctor if you have any side effect that bothers you or does not go away. These are not all the possible side effects Plaquenil. For more information, ask your doctor or pharmacist. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.