I am due to start amitriptyline and am really worried about weight gain. i was on sertraline and still on thyroxine,100 mg?

Weight gain may be: associated with antidepressants like amitryptiline especially if your depression was associated with loss of appetite and weight. However, as long as you pay attention to your diet and keep your thyroid levels in the normal range, you should be fine. Go to www.mayoclinic.org ->patient care->health information ->healthy lifestyle-> nutrition and healthy eating for more info. Dr. Anne