A review report suggests that the commonly used sexual enhancement ingredients including yohimbine, maca, horny goat weed and ginkgo biloba may also induce some psychological symptoms such as mood changes, anxiety, and hallucinations as well as addictive behaviors.  The review suggests that these unexpected side effects may be particularly dangerous to those who experience sexual dysfunctions because they often also suffer psychiatric disorders.  (David Liu)Corazza O, Martinotti G, Santacroce R, Chillemi E, Di Giannantonio M, Schifano F, Cellek S., Sexual Enhancement Products for Sale Online: Raising Awareness of the Psychoactive Effects of Yohimbine, Maca, Horny Goat Weed, and Ginkgo biloba.  Biomed Res Int. 2014;2014:841798.