Wyo. Stat. § 33-24-131

The provisions of this act shall not apply to the sale at
wholesale or sale by any method at retail of economic poisons,
medical and dental supplies, cosmetics, dietary foods, or
nonnarcotic, nonprescription, prepackaged medicinal preparations
contained in distinctive and original unbroken containers, when
such medicinal preparations are identified by and sold under a
trade name of the manufacturer or primary distributor thereof
and are sold or offered for sale to the general public, if such
articles meet the requirements of state and federal food, drug
and cosmetic laws; provided however, that notwithstanding the
above, any drug, medicinal preparation, or substance for use by
man which is determined by the state board of pharmacy, after
notice to the manufacturer or primary distributor thereof, and
opportunity to be heard pursuant to the provisions of the
Wyoming Administrative Procedure Act, as having a depressant or
stimulant effect on the central nervous system or its
hallucinogenic effect, or as habit forming, or as a drug or
product which, because of its toxicity or other potentiality for
harmful effect, or method of use, or the collateral measures
necessary for such use is not safe for use except under the
supervision of a practitioner licensed by law to prescribe such
substances, may be designated by rule as a dangerous drug which
shall be restricted to sale on prescription of a practitioner
licensed by law to prescribe such substances.