Okla. Stat. tit. 3A, § 208.11

A. Except as provided in subsection B of this section, the Oklahoma Horse Racing Commission is hereby authorized to determine by rule which drugs and medications, if any, may be administered to a horse prior to or during a horse race and to determine by rule the conditions under which such drugs and medications may be used or administered. B. All horses participating in a horse race may be administered Furosemide prior to a horse race as authorized by the rules of the Oklahoma Horse Racing Commission. C. The administration of any drug or medication to a horse prior to or during a horse race which is not permitted by rule of the Commission is prohibited. D. Any person who violates the provisions of this section or who knowingly enters in a race a horse to which any drug or medication has been administered in violation of this section shall be guilty, upon conviction, of a Class D1 felony offense and shall be fined not more than Ten Thousand Dollars ($10,000.00), or be imprisoned as provided for in subsections B through F of Section 20N of Title 21 of the Oklahoma Statutes, or by both said fine and imprisonment. The Commission shall suspend or revoke the license of any such guilty party.