Prescription amphetamine drugs such as Adderall, Ritalin, and Dexedrine, are Schedule II drugs. While these can be abused, they can be helpful for attention deficit and other disorders. Methamphetamine is also a Schedule II drug. However, meth has a high potential for abuse, which can mean dangerous and fatal consequences. Meth is smoked, snorted, injected, and can reach the brain quickly, causing considerable damage.