CA Atra 10 Softgel Capsule works by slowing the growth of certain types of diseased blood cells. It should be taken 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 using it regularly to get the most benefit. If you notice no improvement after a few weeks, see your doctor again. Using more medicine or applying it more often than prescribed will not make it work any faster and may increase side effects.