“…In summary, potential alternatives were excluded if they met one or more of the following exclusion criteria: Based on these criteria, the classic psychostimulants like amphetamine, methamphetamine or methylphenidate were excluded, even though they share some of the subjective sequalae of MDMA (Bershad et al, 2016;Oberlender and Nichols, 1988), because they do not potently increase synaptic availability of 5-HT (Liechti, 2015;Rothman et al, 2001;Simmler et al, 2013). While an argument can be made that compounds like 4-bromo-2,5-dimethoxyphenethylamine (2C-B) or N,N-diisopropyl-5-methoxytryptamine (5-MeO-DiPT) are also entactogenic, and they have been described as such in the past (González et al, 2015;Palamar and Acosta, 2020;Schifano et al, 2019), they were also excluded due to their high affinity as agonists at post-synaptic 5-HT 2 and 5-HT 1A receptors (Fantegrossi et al, 2006;Nugteren-van Lonkhuyzen et al, 2015;Taylor et al, 1986;Villalobos et al, 2004), which would indicate that their effects also include a marked psychedelic component. While it is certainly possible that these two compounds, and others like them, may be useful for psychotherapy, their effects are -strictly speaking -not MDMA-like, for which reason they were excluded from this review.…”