Malaria is common in areas such as Africa, South America, and Southern Asia. This medicine is not effective against all strains of malaria. Surveillance ophtalmologique plaquenil Methotrexate and folic acid and plaquenil for lupus Hydroxychloroquine is in a class of drugs called antimalarials. It is used to prevent and treat acute attacks of malaria. It is also used to treat discoid or systemic lupus erythematosus and rheumatoid arthritis in patients whose symptoms have not improved with other treatments. Hydroxychloroquine may cause some people to be agitated, irritable, or display other abnormal behaviors. It may also cause some people to have suicidal thoughts and tendencies, or to become more depressed. If you or your caregiver notice any of these side effects, tell your doctor right away. Drug Interactions With Hydroxychloroquine Certain parasite medications and beta blockers may cause potentially negative drug interactions with hydroxychloroquine. Some interactions can increase your risk of developing side effects, while others can reduce the effectiveness of the medications. Hydroxychloroquine may also be used for purposes not listed in this medication guide. Hydroxychloroquine is also used to treat symptoms of rheumatoid arthritis and discoid or systemic lupus erythematosus. Hydroxychloroquine interactions with alcohol Plaquenil hydroxychloroquine sulfate dose, indications., Hydroxychloroquine Oral Route Precautions - Mayo Clinic How long should i stop plaquenil before surgery 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 lupus, rheumatoid arthritis, and others. Malaria is spread by mosquitoes. Plaquenil Hydroxychloroquine - Side Effects, Dosage.. Drug Interactions With Hydroxychloroquine. Hydroxychloroquine information booklet - Versus Arthritis. How to use Hydroxychloroquine SULFATE. 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 is also based on weight. Hydroxychloroquine is also used to prevent and treat malaria. For this reason, it is sometimes classified as an antimalarial drug. The exact way it works for this condition is unknown. Hydroxychloroquine comes in tablet form. Drug Information. Hydroxychloroquine is used to prevent and treat acute attacks of malaria and to treat both acute and chronic rheumatoid arthritis and lupus. It is in a class of drugs known as antimalarials.