The main purpose of this legislation, known as the Fair Prescription Drug Prices for Americans Act, is to control the retail prices of certain prescription drugs and biological products in the United States. The goal is to ensure that these prices do not exceed the average retail prices for the same products in several other countries, specifically Canada, France, Germany, Italy, Japan, and the United Kingdom. This aims to make medications more affordable for American consumers. Key provisions of the law include a cap on the retail list price of prescription drugs and biological products.