It’s a drug that helps lower platelet counts, mostly used for a condition called essential thrombocythemia. The way it works is by stopping the growth of cells that make platelets, cutting down on production. The medicine comes in small 0.5 mg capsules.
You usually start with 0.5 mg four times in a day. Doctors might change it, depending on how it affects you. They come in bottles that have 100 of those capsules in them.