Welcome to HCM.
is used to treat thyroid hormone deficiency
, and it can cause the side effect that you have mentioned. But i advice you not to stop the drug on your own and it is not good.
Dose adjustment will help i n decreasing the symptom so i advice you to see the consulting physician for that.
Regarding the weight gain, most effective method for weight loss
is reducing the number of calories you consume while increasing the number of calories you burn through physical activity. I advice you to change your life style and it will be better you meet the dietitian for help and also regular exercise is must.
Hope I have provided the information you needed.
Wish you good health. Take care.