A drug provision system includes a slot to which a kit can be attached and detached, the kit including a raw ingredient space into which a raw ingredient of a drug is filled and a reactor for mixing the raw ingredient that flows from the raw ingredient space with another raw ingredient; a raw ingredient feeding mechanism that moves the raw ingredient within the raw ingredient space to the reactor in the kit in which a blocking unit has been released to mix the raw ingredients within the kit; and a collection mechanism that collects a drug within the reactor prepared by mixing the raw ingredients from the kit.