Drug Uses Xenical is a proven medication that helps to manage adiposis in adult and adolescent patients, age 12 and older. Usage Following the dosage instructions of your doctor is the best way to use any medication. If you are unsure or do not remember the instructions then you may read the medicine label for more detailed information. You may choose to take Xenical with a meal that contains fat. If your meal does not contain fat do not take Xenical with it. You should take multi vitamin capsule once at bedtime everyday as Xenical reduces your ability to absorb vitamins. Drug Class and Mechanism Xenical targets he absorption of fat in your body rather than suppressing your appetite. It is aweight loss medication. Long term use for 1-2 years has been shown to be very effective. Using the medicine restricts the dietary fats from being absorbed and thus it allows 30% fat to pass undigested through the gut. Missed Dose Despite your best attempts at remembering, if you still miss out on a dose, then take it as soon as you remember about it. Storage Store Xenical at room temperature, between 68 and 77 degrees F (20 and 25 degrees C). Always keep it in a cool dark place that is not directly exposed to sources of heat or moisture and sunlight. Protect it from kids and pets.