It is recommended that a 500ml infusion of Fat Milk should take no less than 5 hours, how long varies depending on the condition. Fatty milk belongs to energy supplementation drugs, commonly used in intravenous nutrition supplementation, can provide energy and essential fatty acids for the body. It is generally required that the infusion time of 500ml of 10% fat milk injection should not be less than 5 hours; the infusion time of 250ml of 20% and 30% fat milk injection should not be less than 4 hours. The rate of fatty milk infusion should be strictly controlled, and the infusion rate should be appropriately slowed down, otherwise it may aggravate the cardiac load resulting in heart failure, etc. It should be noted that patients with shock and severe lipid metabolism disorders are contraindicated. Possible adverse effects of fat milk infusion include elevated body temperature, chills, nausea, vomiting, skin rash, shortness of breath, hypertension, hypotension, etc. Fatty milk should be used under medical supervision and should not be used on its own.