Suggest Treatment For Weight Gain, Increased Appetite And Weak Scalp Hair

Hi Doctor, I am 21 years old and on Venlor XR 150mg - since i have been on the medication I have noticed extreme weight gain - constant hunger - and also NO hair growth. I have been growing my hair for over 2 years now and it seems that my hair keeps breaking at the tips. I have tried every possible treatment! I feel overweight, unhealthy and old. PLEASE HELP! Regards Janelle