This document summarizes information about prescription drug costs and development. It discusses how medicines have transformed treatment for diseases like hepatitis C and cancer. Developing new treatments takes over 10 years and $2.6 billion on average, with only 12% of drug candidates being approved. Medicines help avoid expensive medical services and provide major savings to the healthcare system. While drug costs have risen, they account for a stable share of overall healthcare spending and are projected to grow in line with other healthcare costs. Many factors influence drug prices, including discounts, rebates, and competition from generics.