Hydroxychloroquine, also known as hydroxychloroquine sulfate, this medication is used orally for the treatment of rheumatoid arthritis, juvenile chronic arthritis, discoid lupus erythematosus, systemic lupus erythematosus, as well as with sunlight-induced or exacerbated by a number of skin lesions, is particularly suited to severe side-effects with little reaction to the drug, or the use of the medication is unsatisfactory, the use of hydroxychloroquine can be considered. Hydroxychloroquine is simply a drug used for immunomodulation, the mechanism of action is not very clear, generally may interact with aerosols, interfere with enzyme activity, DNA binding has stabilized the lysosomal membrane, inhibit the formation of prostaglandins, and other aspects of the role of immune modulation. Hydroxychloroquine needs to be used under the guidance of an experienced doctor, only experienced doctors regulate the diagnosis and treatment of the drug, and the drug should be combined with the dose, the application of a period of time under the guidance of a doctor’s prescription. If the short-term relief of symptoms during use is not good, or the emergence of serious intolerable reactions, such as nausea, vomiting, intolerance of the digestive system, as well as other aspects of the adverse reactions, the drug should be discontinued in time, you can consult a pharmacist, or directly to the hospital. For more information about hydroxychloroquine, precautions, you can refer to the instructions for use under the guidance of a doctor or pharmacist.