Hyperthyroidism after taking medication fat 20 pounds need to clarify the cause of the disease, if the drug caused by hypothyroidism caused by the need to adjust the dose of medication, if it is physiological obesity, the need to adjust the diet and strengthen the movement. 1. Adjust the dose of medication: hyperthyroidism patients in the treatment process, the drug dose needs to be adjusted in a timely manner, if not regular follow-up, did not adjust the dose of medication in a timely manner, it is easy to lead to hypothyroidism, which may lead to weight gain. You should go to the hospital in time, and adjust the drug dosage in time under the guidance of the doctor. 2. Improve your lifestyle: If you are physically obese, you should control your diet appropriately, reduce the intake of high-fat, high-sugar foods, eat more vegetables and fruits, and control your total daily intake, and you should participate in more sports, especially more aerobic exercise, which can help to burn fat and reduce weight. The treatment of hyperthyroidism after taking medication gained 20 pounds, it is recommended to go to a professional hospital in a timely manner, clear cause of the disease under the guidance of the doctor for targeted treatment.