Is there any type of medication to help gain weight?

GNC Calories: You need to take in more calories and there are a number of weight gain products at stores like gnc. Read the labels so you know what amount of protein etc you are taking in. If you are not into this type of product then simply eat more good food (no junk or fried foods).

Not too many: Weight gain from medications is more a side effect rather than a treatment. Though some drugs are used in elderly patients or others who need appetite stimulation, the results are not always good. Check with your physician about nutritional supplements that may help. Don't do it on your own!