Yaz is a prescription medication manufactured by Bayer containing drospirenone and ethinylestradiol. This oral contraceptive comes in a pack of 28 tablets and is used for birth control purposes. This medication is available by prescription only and should be taken as directed by your healthcare provider. The package contains 28 tablets for oral use. As this is a prescription medication, please consult with your doctor about proper usage, potential side effects, and whether this medication is right for you.