Under the DEA's controlled substance scheduling system, which schedule generally includes drugs with a recognized medical use but a high potential for abuse/dependence (such as many opioid pain medications)?

Schedule II controlled substances have a recognized medical use but carry a high potential for abuse and dependence — this category includes many commonly prescribed opioid pain medications (e.g., oxycodone, hydrocodone combination products) and certain stimulants. Schedule I drugs have no recognized medical use and the highest abuse potential; Schedules III-V represent progressively lower abuse potential, with Schedule V being the lowest among controlled substances.