To amend title XVIII of the Social Security Act to limit cost sharing for drugs under the Medicare program.

This bill limits out-of-pocket costs for Medicare Part D prescription drugs. Starting in 2027, it caps the amount seniors pay per month for covered drugs at the "net price" - the average actual price paid after rebates (or the pharmacy's standard cash price, whichever is lower). It directly affects Medicare Part D beneficiaries by reducing their out-of-pocket expenses before reaching the plan's annual out-of-pocket limit. The key provision replaces current cost-sharing rules with this net price cap, aiming to lower drug costs for seniors.