Molecular and Functional Imaging Studies of Psychedelic Drug Action in Animals and Humans Paul Cumming, Milan Scheidegger, Dario Dornbierer, Mikael Palner, Boris B. Quednow and Chantal Martin-Soelch Molecules, 2021, 26, 2451 doi : 10.3390/molecules26092451   Abstract : Hallucinogens are a loosely defined group of compounds including LSD, N,Ndimethyltryptamines, mescaline, psilocybin/psilocin, and 2,5-dimethoxy-4-methamphetamine (DOM), which can evoke intense visual and emotional experiences. We are witnessing a renaissance of research interest in hallucinogens, driven by increasing awareness of their psychotherapeutic potential. As such, we now present a narrative review of the literature on hallucinogen binding in vitro and ex vivo, and the various molecular imaging studies with positron [...]