To amend part D of title XVIII of the Social Security Act to limit the monthly amount of prescription drug cost-sharing for full-benefit dual eligible individuals and other lowest-income individuals under the Medicare Prescription Drug Program.

Amends part D (Voluntary Prescription Drug Benefit Program) of title XVIII (Medicare) of the Social Security Act (SSA) to limit to $10, adjusted for inflation, the monthly amount of prescription drug cost-sharing for full-benefit dual eligible individuals (eligible for both part D and Medicaid under SSA title XIX) and other lowest-income individuals.