Damiana, is a shrub native to southwestern Texas in the United States, Central America, Mexico, South America, and the Caribbean.
Damiana has long been claimed to have a stimulating effect on libido, and its use as an aphrodisiac has continued into modern times.
Damiana has been shown to stimulate sexually exhausted or impotent male rats
Damiana is an ingredient in a traditional Mexican liqueur, which is sometimes used in lieu of Triple Sec in margaritas. Mexican folklore claims that it was used in the "original" margarita. The damiana margarita is popular in the Los Cabos region of Mexico