Okla. Stat. tit. 21 § 1289.9
It shall be unlawful for any person to carry or use shotguns, rifles or pistols in any circumstances while under the influence of beer, intoxicating liquors or any hallucinogenic, or any unlawful or unprescribed drug, and it shall be unlawful for any person to carry or use shotguns, rifles or pistols when under the influence of any drug prescribed by a licensed physician if the aftereffects of such consumption affect mental, emotional or physical processes to a degree that would result in abnormal behavior. Any person convicted of a violation of the provisions of this section shall be punished as provided in Section 1289.15 of this title.
Any person convicted of a violation of the provisions of this section after having been issued a handgun license pursuant to the provisions of the Oklahoma Self-Defense Act shall have the license suspended for a term of six (6) months and shall be subject to an administrative fine of Fifty Dollars ($50.00), upon a hearing and determination by the Oklahoma State Bureau of Investigation that the person is in violation of the provisions of this section.
Okla. Stat. tit. 21, § 1289.9