The generic name of the drug is Hydroxychloroquine Sulfate Tablets, and the instructions clearly state that the drug should be accompanied by eating or drinking milk. Because this can effectively protect the gastric mucosa, reduce abdominal pain, nausea, diarrhea, vomiting and other gastrointestinal adverse reactions. 1. Hydroxychloroquine Sulfate Tablets can be used to treat rheumatoid arthritis, discoid lupus erythematosus, systemic lupus erythematosus, juvenile chronic arthritis, and skin lesions triggered or aggravated by sunlight. However, there is no strict regulation on the time of day the drug should be taken, so it doesn’t matter when the drug is most effective. 2. After taking hydroxychloroquine sulfate tablets, the possible side effects are anorexia, nausea, vomiting, diarrhea, abdominal cramps and other gastrointestinal reactions; excitement, nightmares, dizziness and headache, ataxia and other central nervous system reactions; there may also be skeletal muscle weakness, blurred vision, corneal edema, itchy skin and other manifestations. 3. Contraindications: hypersensitivity to any component of the drug, pregnant and lactating women, and patients who can cause retinal or visual field changes. Hydroxychloroquine Sulfate Tablets should be taken under the guidance of a doctor, do not self-medication.