Hydroxychloroquine Sulfate Tablet’s main efficacy and effect is anti-rheumatic and amelioration of the condition, clinically used for the relief of the treatment of rheumatoid arthritis, chronic arthritis, and skin lesions aggravated or exacerbated by sunlight and other symptoms. Hydroxychloroquine Sulfate Tablets is a kind of immunosuppressant, which is mainly used for the treatment of rheumatoid joints, chronic arthritis in adolescents and young people, discoidal and systemic lupus erythematosus, and skin disorders exacerbated or triggered by sunlight. During administration, some patients may experience adverse reactions such as corneal edema, visual field loss, nausea, and vomiting. The drug works slowly and needs to be taken for a long period of time to achieve certain results. It is contraindicated in patients who are allergic to the drug, in patients with pre-existing macular diseases of the eye, and in children under 6 years of age. Use with caution in pregnant and lactating women. Note that patients should have an eye examination before using the drug, and patients using the drug for a long period of time need to regularly check the skeletal muscle function and tendon reflexes. It is recommended that patients use the drug under the guidance of a doctor to avoid self-medication, resulting in adverse consequences.