The pharmaceutical value chain involves three main components: manufacturing the drug, distributing it, and dispensing it to patients. Manufacturing includes research and development, clinical trials, regulatory approval, and commercial production. It represents a significant cost, especially for innovative drugs that can take over a decade to develop. Generic manufacturers have lower costs. The value provided includes new medical treatments and wider health and economic benefits. Manufacturers' net prices are often lower than list prices due to discounts negotiated with buyers. The level of discount varies between generic and branded drugs and countries.