Abstract: The present invention generally relates to the transdermal administration of (2S)-(4E)-N-methyl-5-(3-(5-isopropoxypyridin)yl)-4-penten-2-amine, or pharmaceutically acceptable salts thereof. The transdermal administration can be effected using transdermal drug delivery devices, semi-solid dosage forms, or iontophoresis. The drug delivery devices and/or semi-solid dosage forms can provide instantaneous release, sustained release, or combinations thereof, and can include permeation enhancers and other components to assist in drug transport across the dermis, especially the epidermis. The compositions can be used to treat and/or prevent any indication which the active ingredients are capable of treating and preventing, but deliver (2S)-(4E)-N-methyl-5-(3-(5-isopropoxypyridin)yl)-4-penten-2-amine, or pharmaceutically acceptable salts thereof, in an efficacious manner. Disorders that can be treated and/or prevented include central nervous system disorders, addictions, pain, and inflammation.