 The purpose of this study is to examine the effect of standard dosing of cyproheptadine for both cycled and continuous administration, as compared to no medication, on appetite stimulation and growth in the pediatric gastroenterology feeding team patient population. The secondary aim is to evaluate the effect, if any, of the suspected tachyphylaxis that is commonly associated with cyproheptadine use. The third aim will be to examine the type and duration of side effects of cyproheptadine in this population. The ultimate goal will be to create a standardized protocol for cyproheptadine therapy in children with feeding disorders and suboptimal growth. 