Controlled substances are drugs that are regulated by the government due to their potential for abuse and harm. These drugs are classified into different schedules based on their medical use, potential for abuse, and safety profile. Schedule I drugs have a high potential for abuse and no accepted medical use, such as heroin and LSD. Schedule II drugs also have a high potential for abuse but have accepted medical uses, such as opioids like oxycodone and stimulants like Adderall. Schedule III, IV, and V drugs have decreasing potential for abuse and increasing accepted medical uses, such as anabolic steroids, benzodiazepines, and cough suppressants with codeine.