If a diabetic patient receives 30 mls of Lantus insulin as a 60 day supply, how many units of insulin is the patient injecting each day? The patient is injecting 50 units of insulin per day. This is found as follows: 1 ml of insulin contains 100 units To find the total number of units multiply 30 * 100 = 3000 units To find the daily dose divide the total number of units by the days supply 3000/60 = 50 units