I developed congestive heart failure and was taken off all RA meds except prednisone for a year. For years, I have been complaining to any of my doctors, who would listen, about the dizziness. I went back to my rheumatologist and he prescribed plaquenil again. In the beginning ( The first year or two) It really helped, with my symptoms, with lupus. This past two years, the dizziness has now, turned in to vertigo. Plaquenil sore throat Chloroquine and primaquine malaria Renal clearance in rheumatoid arthritis RA patients taking PLAQUENIL for at least six months seemed to be similar to that of the single dose studies in volunteers, suggesting that no change occurs with chronic dosing. I love plaquenil too and just hit the sixth month mark 400mg a day. It took about 3 months for me to notice anything, but seems to get better and better the longer I'm on it. Still getting the flares, but they don't seem to be as severe as they were now. Immunodeficiency disorders is found among people who take Plaquenil, especially for people who are female, 60+ old, have been taking the drug for 6 - 12 months, also take medication Humira, and have Mixed connective tissue disease. Now, that I have read this site, explanation of plaquenil, I think the mystery is solved. After taking it for 6 weeks, I had shortness of breath so I stopped taking it. Again, I have been trying to find out , what have been causing the vertigo. Plaquenil 6 months Taking Plaquenil for Rheumatoid Arthritis, Plaquenil - How to get on hydroxychloroquineChloroquine-resistant malaria may be treated with __________ Taking Plaquenil. Plaquenil is available in 200 mg oral tablets. The usual dose is between one and two tablets per day 200 to 400 mg per day. When Plaquenil works, most patients start to feel improvement after 8-12 weeks. The maximum effect can take 6-12 months. Plaquenil – RheumInfo. Will you have Immunodeficiency disorders with Plaquenil.. Plaquenil - FDA prescribing information, side effects and uses. Find user ratings and reviews for Plaquenil oral on WebMD including side effects and drug interactions, medication effectiveness, ease of use and satisfaction. 25-34 on Treatment for 1 to 6. When treating lupus or arthritis, Plaquenil is usually given daily for several weeks or months. For best results, keep using the medication as directed. Talk with your doctor if your symptoms do not improve after 6 months of treatment. While using Plaquenil, you may need frequent blood tests and vision exams. Plaquenil and Diarrhea - from FDA reports Summary Diarrhea 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. This study is created by eHealthMe based on reports of 57,706 people who have side effects when taking.