Ind. Code § 35-48-2-12
(b) Narcotic drugs containing nonnarcotic active medicinal ingredients. Any compound, mixture, or preparation containing any of the following narcotic drugs, or their salts calculated as the free anhydrous base or alkaloid, in the following quantities, which shall include one (1) or more nonnarcotic active medicinal ingredients in sufficient proportion to confer upon the compound, mixture, or preparation, valuable medicinal qualities other than those possessed by the narcotic drug alone:
(d) Depressants. Unless specifically exempted or excluded or unless listed in another schedule, any material, compound, mixture, or preparation which contains any quantity of the following substances having a depressant effect on the central nervous system, including its salts:
(7) Pregabalin [(S)-3-(aminomethyl)-5-methylhexanoic acid] (2782).
As added by Acts 1976, P.L.148, SEC.7. Amended by Acts 1979, P.L.303, SEC.7; Acts 1981, P.L.170, SEC.6; P.L.327-1985, SEC.3; P.L.22-2008, SEC.5; P.L.283-2013, SEC.4; P.L.119-2019, SEC.6; P.L.61-2020, SEC.8; P.L.10-2021, SEC.2; P.L.48-2023, SEC.7.