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. Chloroquine food cravings Chloroquine cancer clinical trials Plaquenil and surgery risk People who take too much quinine may have overdose symptoms that could include Headaches. Nausea and vomiting. Abdominal stomach pain. Diarrhea. Drowsiness. Incoordination. Breathing problems. If you don't have to, don't stop your plaquenil. I stopped taking the plaquenil the beginning of December. It doesn't agree with my stomach I take it with meals too. And since I hadn't had a miraculous recovery the 6 months I'd been on it, I didn't think there was any harm in stopping it. Take this medication with a meal or a glass of milk to prevent stomach upset. Common side effects include nausea, loss of appetite, headache, and diarrhea. Plaquenil can cause blurred vision and dizziness. Do not drive or operate heavy machinery until you know how it affects you. 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. What happens if you take too much hydroxychloroquine RA and Hydroxychloroquine How Effective is it for Rheumatoid., Stopping plaquenil. DailyStrength Prescribing hydroxychloroquine for ra for med studentsGlaucoma and plaquenil Hydroxychloroquine can be taken with a glass of milk or a meal to decrease nausea. Follow the directions on your prescription label carefully, and ask your doctor or pharmacist to explain any part you do not understand. Take hydroxychloroquine exactly as directed. Do not take more or less of it or take it more often than prescribed by your doctor. Hydroxychloroquine MedlinePlus Drug Information. Plaquenil - Side Effects, Uses, Dosage, Overdose.. Hydroxychloroquine plaquenil withdrawl? - LUPUS UK. This may lead to lasting eyesight problems. The risk may be higher if you have some types of eye or kidney problems. The risk may also be higher with some doses of hydroxychloroquine, if you use hydroxychloroquine for longer than 5 years, or if you take certain other drugs like tamoxifen. Call your doctor right away if you have any eyesight changes like blurred or foggy eyesight, trouble focusing or reading, or trouble seeing in dim light. It is a good idea to advise the prescribing physician whenever one uses more or less than the prescribed amount of a medication. However, in general terms, taking 400 mg of hydroxychloroquine is within a safe range for most people. Plaquenil, hydroxychloroquine HCQ, is an anti-malarial medication that has been proven to be useful in the treatment of patients with rheumatoid arthritis RA, systemic lupus erythematosus SLE and other inflammatory and autoimmune diseases. In Sjögren’s, Plaquenil is used to treat many symptoms.