PMID- 24633447 OWN - NLM STAT- MEDLINE DCOM- 20150828 LR - 20211021 IS - 1432-2072 (Electronic) IS - 0033-3158 (Print) IS - 0033-3158 (Linking) VI - 231 IP - 19 DP - 2014 Oct TI - MDMA effects consistent across laboratories. PG - 3899-905 LID - 10.1007/s00213-014-3528-z [doi] AB - RATIONALE: Several laboratories have conducted placebo-controlled drug challenge studies with 3,4-methylenedioxymethamphetamine (MDMA), providing a unique source of data to examine the reliability of the acute effects of the drug across subject samples and settings. We examined the subjective and physiological responses to the drug across three different laboratories and investigated the influence of prior MDMA use. METHODS: Overall, 220 healthy volunteers with varying levels of previous MDMA experience participated in laboratory-based studies in which they received placebo or MDMA orally (1.5 mg/kg or 125-mg fixed dose) under double-blind conditions. Cardiovascular and subjective effects were assessed before and repeatedly after drug administration. The studies were conducted independently by investigators in Basel, San Francisco, and Chicago. RESULTS: Despite methodological differences between the studies and differences in the subjects' drug use histories, MDMA produced very similar cardiovascular and subjective effects across the sites. The participants' prior use of MDMA was inversely related to feeling "Any Drug Effect" only at sites testing more experienced users. CONCLUSIONS: These data indicate that the pharmacological effects of MDMA are robust and highly reproducible across settings. There was also modest evidence for tolerance to the effects of MDMA in regular users. FAU - Kirkpatrick, Matthew G AU - Kirkpatrick MG AD - Department of Psychiatry and Behavioral Neuroscience, University of Chicago, 5841 S. Maryland Ave., MC 3077, Chicago, IL, 60637, USA. FAU - Baggott, Matthew J AU - Baggott MJ FAU - Mendelson, John E AU - Mendelson JE FAU - Galloway, Gantt P AU - Galloway GP FAU - Liechti, Matthias E AU - Liechti ME FAU - Hysek, Cedric M AU - Hysek CM FAU - de Wit, Harriet AU - de Wit H LA - eng GR - DA02812/DA/NIDA NIH HHS/United States GR - R21 DA026570/DA/NIDA NIH HHS/United States GR - DA026570/DA/NIDA NIH HHS/United States GR - R01 DA002812/DA/NIDA NIH HHS/United States GR - DA017716/DA/NIDA NIH HHS/United States GR - UL1 TR000430/TR/NCATS NIH HHS/United States GR - R01 DA016776/DA/NIDA NIH HHS/United States GR - DA016776/DA/NIDA NIH HHS/United States GR - R01 DA017716/DA/NIDA NIH HHS/United States PT - Journal Article PT - Multicenter Study PT - Research Support, N.I.H., Extramural PT - Research Support, Non-U.S. Gov't DEP - 20140315 PL - Germany TA - Psychopharmacology (Berl) JT - Psychopharmacology JID - 7608025 RN - KE1SEN21RM (N-Methyl-3,4-methylenedioxyamphetamine) SB - IM MH - Adult MH - Blood Pressure/*drug effects/physiology MH - Double-Blind Method MH - Female MH - Heart Rate/*drug effects/physiology MH - Humans MH - Male MH - N-Methyl-3,4-methylenedioxyamphetamine/*administration & dosage MH - Reproducibility of Results MH - Young Adult PMC - PMC4161650 MID - NIHMS575897 EDAT- 2014/03/19 06:00 MHDA- 2015/09/01 06:00 PMCR- 2015/10/01 CRDT- 2014/03/18 06:00 PHST- 2014/01/17 00:00 [received] PHST- 2014/02/26 00:00 [accepted] PHST- 2014/03/18 06:00 [entrez] PHST- 2014/03/19 06:00 [pubmed] PHST- 2015/09/01 06:00 [medline] PHST- 2015/10/01 00:00 [pmc-release] AID - 10.1007/s00213-014-3528-z [doi] PST - ppublish SO - Psychopharmacology (Berl). 2014 Oct;231(19):3899-905. doi: 10.1007/s00213-014-3528-z. Epub 2014 Mar 15.