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 and photophobia Chloroquine phosphate and psoriasis 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. When I started Plaquenil back in November last year, I had terrible headaches which started about 1/2 an hour after taking pills. It happened so consistently that I started taking tylenol when I would take it. I would lay down with an ice pack under my neck and darken the room. Plaquenil is also an antirheumatic medicine and is used to treat symptoms of rheumatoid arthritis and discoid or systemic lupus erythematosus. Important information. Taking Plaquenil long-term or at high doses may cause irreversible damage to the retina of your eye. 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 Health Issues - Drug Interactions / Side Effects Plaquenil., Plaquenil and headaches DailyStrength Can you take plaquenil with propapanololHow does plaquenil treat arthritisPlaquenil capsulePlaquenil and nerve pain Side effects include irritability, headache, weakness, hair lightening or loss, stomach upset, nausea, dizziness, muscle pain, rash and itching. Rarely, hydroxychloroquine can affect the bone marrow leading to reduced white blood cells leukopenia or platelets thrombocytopenia and abnormal red blood cells. Hydroxychloroquine Plaquenil Side Effects & Dosage for Malaria. Plaquenil Uses, Dosage & Side Effects -. Plaquenil and dizziness -. 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. 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. Hello, Thanks for your query on HCM As per your clinical history is concerned please follow like this - 1Do a clinical examination by your treating Doctor Neurologistand to confirm the cause of headache do MRI scan, CBC and a nasal endoscopy 2Discuss with your treating Doctor about.