Hydroxychloroquine is available as the brand-name drug Plaquenil. Generic drugs usually cost less than the brand-name version. Hydroxychloroquine may be used as part of a combination therapy. Hydroxychloroquine 200 mg tablet Chloroquine phosphate powder lethal Hydroxychloroquine attenuates cigarette smoke induced autophagic signaling in the mouse ovary Author links open overlay panel H. C. Furlong a J. M. Wessels a M. T. Guerra b M. R. Stämpfli c W. G. Foster a A very bad and sometimes deadly reaction has happened with hydroxychloroquine. Most of the time, this reaction has signs like fever, rash, or swollen glands with problems in body organs like the liver, kidney, blood, heart, muscles and joints, or lungs. Talk with the doctor. Keep away from children. Retinal toxicity from hydroxychloroquine is rare, but even if the medication is discontinued, vision loss may be irreversible and may continue to progress. It is imperative that patients and physicians are aware of and watch for this drug’s ocular side effects. Hydroxychloroquine is used to treat lupus erythematosus and rheumatoid arthritis. It isn’t fully understood how this drug works to treat lupus erythematosus or rheumatoid arthritis. That means you may need to take it with other drugs. It treats malaria by killing the parasites that cause the disease. Hydroxychloroquine and smoking Plaquenil Hydroxychloroquine - Side Effects, Dosage., Hydroxychloroquine Indications, Side Effects, Warnings. Sandoz plaquenilChloroquine resistance prophylaxis Efficacy and Safety of Hydroxychloroquine for Treatment of Pneumonia Caused by 2019-nCoV HC-nCoV The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U. S. Federal Government. Efficacy and Safety of Hydroxychloroquine for Treatment of.. Hydroxychloroquine-Induced Retinal Toxicity - American.. Hydroxychloroquine - CardioSmart. Antimalarials, such as chloroquine and hydroxychloroquine, have been used to treat cutaneous and systemic lupus erythematosus for decades with excellent therapeutic efficacy. Smoking seems to inhibit the therapeutic efficacy of antimalarials when treating cutaneous lupus erythematosus CLE, but the reason behind this observation is unclear. Side-effects and risks. Side-effects aren't common. However, in some people hydroxychloroquine can cause skin rashes, especially those made worse by sunlight. feeling sick nausea or indigestion. diarrhoea. headaches. bleaching of the hair or mild hair loss. Hydroxychloroquine Plaquenil is used to treat malaria, lupus, and rheumatoid arthritis. Learn about side effects, warnings, dosage, and more.