It can decrease the pain and swelling of arthritis. It may prevent joint damage and reduce the risk of long-term disability. Hydroxychloroquine vidal Chloroquine phosphate suspension Plaquenil decrease immune system Plaquenil hair loss how long Stop taking Plaquenil and call your doctor at once if you have trouble focusing, if you see light streaks or flashes in your vision, or if you notice any swelling or color changes in your eyes. Before using Plaquenil, tell your doctor if you are allergic to any drugs, or if you have psoriasis, porphyria, liver disease, alcoholism, or glucose-6-phosphate dehydrogenase G-6-PD deficiency. I forgot to take my Plaquenil 200mg dose earlier so I took it around 10pm. Now I have an upset stomach/very crampy and the related issues that go with it. I should have taken a piece of toast or something small but I ate late 7pm and wasn't hungry so I thought I was still "safe". I normally post on the arthritis board, and due to toxicity of the Plaquenil after 2 years, I have had to discontinue it, since I failed the visual field testing. Although I take Enbrel, and MTX, neither one work as well as the Plaquenil and the fatigue and joint pain have returned full force. Today, it is used to treat rheumatoid arthritis, some symptoms of lupus, childhood arthritis (or juvenile idiopathic arthritis) and other autoimmune diseases. Hydroxychloroquine is in a class of medications that was first used to prevent and treat malaria. Forgot to take plaquenil Plaquenil Tablets - NPS MedicineWise, Upset stomach from plaquenil - Sjogren's World Chloroquine lysosome fusionWater hydroxychloroquine Hello all, I am currently new to this site and ran across the discussion about stopping Plaquenil. I have been taking Plaquenil for about 8-9 months and thought that it was not helping me because I still have a fair amount of joint pain, fatigue, muscle pain and so many other issues. Stopping plaquenil. DailyStrength. Discontinued Plaquenil.other options?. Hydroxychloroquine Plaquenil. Find patient medical information for Plaquenil Oral on WebMD including its uses, side effects and safety, interactions, pictures, warnings and user ratings. Before you take Plaquenil When you must not take Plaquenil Do not take Plaquenil if you have ever had an allergic reaction to hydroxychloroquine, chloroquine, or related products or any of the ingredients listed under "Product Description". If you are uncertain whether you have had an allergic reaction to a related product ask your doctor or If you miss a dose, take it as soon as you remember. If it is very near the time of the next dose, skip the missed dose and continue with your normal dosing schedule. Do not double dose at one time to catch up. Plaquenil should be stored away from light and moisture and at room temperature up to 86 degrees F.