PMID- 11697543 OWN - NLM STAT- MEDLINE DCOM- 20020402 LR - 20190710 IS - 0022-3573 (Print) IS - 0022-3573 (Linking) VI - 53 IP - 10 DP - 2001 Oct TI - Arginine vasopressin release in response to the administration of 3,4-methylenedioxymethamphetamine ("ecstasy"): is metabolism a contributory factor? PG - 1357-63 AB - The aim of this investigation was to examine the effect of 3,4-methylenedioxymethamphetamine (MDMA) administration on arginine vasopressin (AVP) release. (R,S)-MDMA (40 mg) was administered to eight normally hydrated healthy male volunteers (22-32 years) and blood samples were collected up to 24 h. Plasma was assayed for AVP and cortisol by radioimmunoassays, and for MDMA and the N-demethylated metabolite, MDA, by gas chromatography-mass spectrometry. Sodium concentrations and osmolality were also determined. Plasma AVP increased in all subjects after MDMA administration and a significant negative correlation was observed between concentrations of AVP and both single and total enantiomer MDMA at 1 h (r < -0.91, P < 0.01). This had disappeared by 2 h (P > 0.7). Compared with basal values, no significant change was observed for osmolality or cortisol at 1 h after drug administration. In conclusion, plasma AVP concentrations increase after MDMA administration, but the increase is not part of a generalized stress response since cortisol did not increase concurrently. A significant negative correlation between plasma MDMA and AVP was observed soon after administration. The possibility that a pharmacological effect of MDMA is primarily mediated via one or more metabolites, rather than by the parent drug, should be considered. FAU - Forsling, M AU - Forsling M AD - Neuroendocrine Laboratories, New Hunts House, King's College London, Guy's Hospital, UK. FAU - Fallon, J K AU - Fallon JK FAU - Kicman, A T AU - Kicman AT FAU - Hutt, A J AU - Hutt AJ FAU - Cowan, D A AU - Cowan DA FAU - Henry, J A AU - Henry JA LA - eng PT - Clinical Trial PT - Journal Article PL - England TA - J Pharm Pharmacol JT - The Journal of pharmacy and pharmacology JID - 0376363 RN - 0 (Hallucinogens) RN - 113-79-1 (Arginine Vasopressin) RN - 9NEZ333N27 (Sodium) RN - KE1SEN21RM (N-Methyl-3,4-methylenedioxyamphetamine) RN - WI4X0X7BPJ (Hydrocortisone) SB - IM MH - Adult MH - Arginine Vasopressin/*metabolism MH - Biotransformation MH - Hallucinogens/blood/pharmacokinetics/*pharmacology MH - Humans MH - Hydrocortisone/blood MH - Male MH - N-Methyl-3,4-methylenedioxyamphetamine/blood/pharmacokinetics/*pharmacology MH - Osmolar Concentration MH - Sodium/blood MH - Stereoisomerism EDAT- 2001/11/08 10:00 MHDA- 2002/04/03 10:01 CRDT- 2001/11/08 10:00 PHST- 2001/11/08 10:00 [pubmed] PHST- 2002/04/03 10:01 [medline] PHST- 2001/11/08 10:00 [entrez] AID - 10.1211/0022357011777855 [doi] PST - ppublish SO - J Pharm Pharmacol. 2001 Oct;53(10):1357-63. doi: 10.1211/0022357011777855.