Pharmaceutical compositions for interfering with neuronal transmission comprising an effective amount of at least one tricyclic 3,4-propinoperhydropurine are disclosed. Preparations for facial rejuvenation are provided that comprise an effective amount of the composition of the invention and a facial cream. Methods of interfering with neuronal transmission comprising topical application of an effective amount of the pharmaceutical compositions of the invention are provided. In another aspect of the invention, effective amounts of the pharmaceutical compositions and a transdermal therapeutic system are provided for transdermal administration of at least one tricyclic 3,4-propinoperhydropurine. The pharmaceutical composition contains at least one at least one tricyclic 3,4-propinoperhydropurine, and may be formulated for transdermal drug delivery. The transdermal drug delivery system may be a laminated composite comprising a backing layer, a drug reservoir, and a means for affixing the composite to the skin.