When taking hydroxychloroquine, you should temporarily stop taking the drug or reduce the dosage under the guidance of your physician for minor side effects, and immediately stop taking the drug and seek medical attention for serious side effects. Minor side effects such as anorexia, nausea, vomiting, diarrhea, abdominal cramps, and rash may occur with hydroxychloroquine and should be temporarily discontinued or the dose reduced under the direction of a physician, depending on the situation. Stop taking hydroxychloroquine immediately and seek medical attention when allergic reactions, muscle weakness or any visual sensitivity, visual field abnormalities, changes in pigmentation of the optic papillary area, visual field loss, flashes and streaks in front of the eyes that cannot be explained by other causes, and other serious side effects occur. Hydroxychloroquine is used for the following conditions that do not respond satisfactorily to medications with few potentially serious side effects: rheumatoid arthritis, juvenile chronic arthritis, discoid lupus erythematosus and systemic lupus erythematosus, and sun-induced or exacerbated skin lesions. CAUTION: Regular eye examinations, blood tests, liver and kidney function, and knee and ankle reflexes should be performed while taking the drug. Taking hydroxychloroquine, you need to follow the doctor’s instructions under the guidance of a physician reasonable use of medication, and regular review, the emergence of discomfort in a timely manner to avoid delays in the condition.