8-12 hours
Schedule III: Drugs with less abuse potential (compared to drugs in Schedule I and II), including such Vicodin and Tylenol with Codeine. Schedule I: Drugs with a high potential for abuse and no currently accepted medical use, such as LSD and Heroin. Schedule II: Drugs with a history of substance abuse, such as OxyContin and Demerol. Drugs under Schedule IV, including such Valium and Ativan, have a reduced risk for misuse than those in Schedule III.
Drugs under Schedule V, like Robitussin AC and Phenergan with Codeine, have a lower risk for misuse than those in Schedule IV.
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