What other type of medication or pills that i can take to make me gain weight?

Weight = calories in - calories out(burned with exercise) Go to the App Cronometer.com and enter what you eat and do for a few days. Increase intake to 200 calories about what you are eating-burning and your weight will go up.

Why are you trying to gain weight? Have you been told by a physician that you are underweight? These are questions to discuss with your primary care doctor so that we can ensure that you are not pursuing weight gain inappropriately. If you gain all fat mass, then your health will probably not improve. Focusing on increased muscle mass however is preferred.