Plaquenil is used to treat or prevent malaria, a disease caused by parasites that enter the body through the bite of a mosquito. Malaria is common in areas such as Africa, South America, and Southern Asia. Plaquenil dosage weight Hydroxychloroquine and anemia Some of the dosage forms listed on this page may not apply to the brand name Plaquenil. For the Consumer. Applies to hydroxychloroquine oral tablet. Along with its needed effects, hydroxychloroquine the active ingredient contained in Plaquenil may cause some unwanted effects. Although not all of these side effects may occur, if they do occur. Plaquenil is a slow-acting drug, meaning that it can take up to 6 months to experience the full benefits of this medication, but it is possible for symptoms to improve in as few as 1 or 2 months. Plaquenil and other antimalarials are the key to controlling lupus long-term, and some lupus patients may be on Plaquenil for the rest of their lives. And benefits of taking Plaquenil while you are pregnant. When Plaquenil is taken for long periods of time, there is an increased risk to the unborn child. It may cause problems with brain function, hearing, balance and vision. Ask your doctor about the risks and benefits of taking Plaquenil while you are breastfeeding. Plaquenil is also an antirheumatic medicine and is used to treat symptoms of rheumatoid arthritis and discoid or systemic lupus erythematosus. This medicine is not effective against all strains of malaria. Does plaquenil cause headaches Plaquenil Hydroxychloroquine - Side Effects, Dosage., Plaquenil What You Need to Know - Kaleidoscope Fighting Lupus Nifedipine and hydroxychloroquineVd chloroquineHydroxychloroquine widely use Thanks for your advice, Shani. The headaches were just bad headaches and stopped when I started taking Plaquenil at night instead of the morning. The blurred vision came separately and went a day or two after I stopped the Plaquenil again. As it happens, my GP phoned me today about something else and I told her about this. Plaquenil headache. Lupus Forums at The Lupus Site. Plaquenil Tablets - Medsafe. Health Issues - Drug Interactions / Side Effects Plaquenil.. Find patient medical information for Plaquenil Oral on WebMD including its uses, side effects and safety, interactions, pictures, warnings and user ratings. Plaquenil and Headache - from FDA reports Summary Headache is found among people who take Plaquenil, especially for people who are female, 60+ old, have been taking the drug for 1 - 6 months, also take medication Enbrel, and have Pain. I’m sorry to hear about the negatives regarding Plaquenil. It has been a miracle drug for me with the pain from RA. I only recently found out that this was a drug used to treat malaria, and that it can cause problems with eyesight.