How many years for possession of a controlLed substance?

The length of a prison sentence for possession of a controlled substance can vary significantly based on factors such as the type and amount of substance, prior criminal history, and jurisdiction. In many places, simple possession can result in penalties ranging from fines to several years in prison. For example, in the U.S., possession of certain drugs might carry a sentence of a few months to several years, depending on state laws. It's best to consult local laws for specific information.