Vilactin AA Plus 183 Calories Per Carton. For the dietary management of Maple Syrup Urine Disease (MSUD). Dispensed by prescription. Vilactin AA Plus is a ready-to-drink metabolic formula product for MSUD patients, over 1 year of age. Vilactin AA Plus contains an advanced fortification blend. Comes in a 250 mL carton. For the dietary management of Maple Syrup Urine Disease (MSUD). Use as directed by physician. Must be administered under medicalsupervision only.