Medicare covered 30 percent of prescription drug costs, or $101 billion, in 2017, according to a new Kaiser Family Foundation study.
The 10 drugs costing Medicare the most:
1. Harvoni ($4.4 billion)
2. Revlimid ($2.6 billion)
3. Lantus Solostar ($2.5 billion)
4. Januvia ($2.4 billion)
5. Crestor ($2.3 billion)
6. Advair Diskus ($2.3 billion)
7. Lyrica ($2.1 billion)
8. Xarelto ($1.9 billion)
9. Eliquis ($1.9 billon)
10. Spiriva ($1.8 billion)