Retiva 10 Capsule belongs to a group of medicines called retinoids (vitamin A derivative). It is used to treat severe acne that has not responded to other treatments.Tretiva 10 Capsule should be used in the dose and duration as advised by your doctor. Take it with food, preferably at the same time each day to avoid a missed dose. It may take several weeks for your symptoms to improve but keep taking the medicine regularly to get the most benefit. If you notice no improvement after a few weeks, see your doctor again.