Here are the 10 drugs subject to the initial talks this year:

• Eliquis, made by Bristol-Myers Squibb, is used to prevent blood clotting, to reduce the risk of stroke.
• Jardiance, made by Boehringer Ingelheim, is used to lower blood sugar for people with Type 2 diabetes. 
• Xarelto, made by Johnson & Johnson, is used to prevent blood clotting, to reduce the risk of stroke.
• Januvia, made by Merck, is used to lower blood sugar for people with Type 2 diabetes.
• Farxiga, made by AstraZeneca, is used to treat Type 2 diabetes.
• Entresto, made by Novartis, is used to treat certain types of heart failure.
• Enbrel, made by Amgen, is used to treat rheumatoid arthritis. 
• Imbruvica, made by AbbVie, is used to treat different types of blood cancers. 
• Stelara, made by Janssen, is used to treat Crohn’s disease.
• Fiasp and NovoLog, insulins made by Novo Nordisk

The 10 medicines accounted for $50.5 billion, or about 20%, of total Part D prescription drug costs from June 1, 2022, to May 31, 2023, according to the Centers for Medicare and Medicaid Services, or CMS. 

The drugs have been on the market for at least seven years without generic competitors, or 11 years in the case of biological products such as vaccines. 

In 2022 alone, 9 million seniors spent $3.4 billion out-of-pocket on the 10 drugs.

Souce: CNBC