Malaria is common in areas such as Africa, South America, and Southern Asia. This medicine is not effective against all strains of malaria. When to take plaquenil Mechanism of chloroquine action Chloroquine method Side effects Mild nausea, constipation, headaches, dizziness, tinnitus Special Precautions for Hydroxychloroquine 200mg Impaired liver or renal function, severe GI disorders, porphyria, psoriasis, neurological disorders especially a history of epilepsy, myasthenia gravis, G6PD deficiency, pregnancy, lactation. Hydroxychloroquine may not prevent malaria in all cases. If you experience fever or other symptoms of illness, seek immediate medical attention. You may need a different medication. Avoid exposure to mosquitoes. See also Notes section. SIDE EFFECTS Nausea, stomach cramps, loss of appetite, diarrhea, dizziness, or headache may occur. If any of these effects persist or worsen, notify your doctor or pharmacist promptly. Taking hydroxychloroquine long-term or at high doses may cause irreversible damage to the retina of your eye. Hydroxychloroquine is also an antirheumatic medicine and is used to treat symptoms of rheumatoid arthritis and discoid or systemic lupus erythematosus. Hydroxychloroquine 200 mg tab side effects Hydroxychloroquine Side Effects - GoodRx, Hydroxychloroquine 200mg Brands Prices, Side-effects, Uses. What does hydroxychloroquine costPlaquenil manufacturer covisHonduras chloroquine sensitivePlaquenil and tbPlaquenil methotrexate RARE side effects. If experienced, these tend to have a Severe expression. Abnormal Liver Function Tests. Acute Liver Failure. Acute Pustular Eruptions On Skin. Bronchospasm. Decreased Blood Platelets. Decreased White Blood Cells. Common and Rare Side Effects for Hydroxychloroquine Oral. Hydroxychloroquine 200 mg Tablets Generic Plaquenil. Hydroxychloroquine Oral Route Side Effects - Mayo Clinic. Hydroxychloroquine oral tablet doesn’t cause drowsiness, but it can cause other side effects. More common side effects. The more common side effects that can occur with hydroxychloroquine include Urine hydroxychloroquine levels were still detectable after 3 months with approximately 10% of the dose excreted was parent drug. Results following a single dose of a 200 mg tablet versus i.v. infusion 155 mg, demonstrated a halflife of about 40 days and a large volume of distribution. Hydroxychloroquine 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.