Fenugreek, also known as Hydroxychloroquine Sulfate Tablets, is mainly used for rheumatoid arthritis, juvenile chronic arthritis, discoid lupus erythematosus and systemic lupus erythematosus, as well as for skin lesions triggered or exacerbated by sunlight. The side effects of the drug are mainly on the central nervous system, neuromuscular system, eyes, skin, blood system, gastrointestinal tract, cardiovascular system and others. 1. Central nervous system effects: irritability, nervousness, mood changes, dizziness, nystagmus, ataxia, and so on. 2. Neuromuscular effects: skeletal muscle paralysis, weakened tendon reflexes, neuromyopathy, etc. 3. Eye effects: blurred vision, corneal edema and turbidity, abnormal retinal pigmentation, visual field defects, etc. 4. Skin reactions: alopecia, photosensitivity, skin lesions, itching, etc. 5. Hematological system effects: recrudescence, thrombocytopenia, leukopenia, anemia, etc. 6. Gastrointestinal effects: anorexia, nausea, vomiting, diarrhea, abdominal cramps, etc. 7. Cardiovascular system effects: cardiomyopathy, cardiac conduction abnormalities, etc. 8. Others: allergic reaction, weight loss, lethargy, etc. Hydroxychloroquine Sulfate Tablets have more adverse reactions, and should be used under the guidance of specialists in regular hospitals, and when discomfort occurs, consult a doctor in time.