Drugs are becoming legalized as time goes by. Even in Oklahoma, possession of small amounts of illegal drugs is only a misdemeanor as of July 1, 2017.
But what about large amounts of drugs?
Depending on how much contraband a person is caught with they could be charged with Drug Trafficking under Section 2-415 of Title 63. Trafficking can apply to the following substances: marijuana, cocaine, heroin, meth, LSD, PCP, cocaine base, MDMA, morphine, oxycodone, hydrocodone, and benzodiazepine. Whether a person is "trafficking" depends heavily on exactly how much they are caught with.
Some examples of how this shakes out: