Final answer:
The Blue Cross Blue Shield MA formulary covers Tadalafl (Cialis) tablet, which is an excluded drug under Medicare.
Step-by-step explanation:
The Blue Cross Blue Shield MA formulary covers Tadalafl (Cialis) tablet, which is an excluded drug under Medicare. Avanafl (Stendra), Vardenafl (Levitra), and Sidenafl (generic Viagra) tablet are not covered on the formulary. Medicare's lack of prescription drug coverage led to the Medicare Prescription Drug and Modernization Act of 2003 which introduced assistance programs like the prescription drug discount card.