hello and thank you for aksing HCM, I understand your concern, especially because of mentioned side effects. My suggestion is to avoid any kind of medication to gain weight. The best would be to count your calories each day. Women need 2000 and men 2500 calories each day. Try to intake more than you need. Try also to avoid unhealthy food and fast food. On the internet you can find calorie tables for food. I hope this answer was helpful to you.