Monday mood decline after weekend ecstasy use: A retrospective analysis of daily diary reports.

Abstract

<h4>Background</h4>Ecstasy is commonly used on weekends and linked to post-use mood declines. Laboratory studies with pure MDMA rarely detect residual effects, whereas naturalistic studies more often report mood reductions. The timing and contextual drivers of these effects remain unclear.<h4>Methods</h4>Data from seventeen participants reporting weekend ecstasy use (10 male, 7 female; 19-38 years) were drawn from a previously conducted study and analyzed for temporal mood changes not identified in the original report. Participants completed observation weeks following both ecstasy-use and nonuse weekends. Daily diaries assessed mood (0-10), other affective states, drug use, and sleep-related measures. Weekly BDI-II and BAI scores were collected.<h4>Results</h4>A significant Weekend Ecstasy X Day interaction was present (<i>F</i>(3,48) = 3.41, <i>p</i> = 0.037), driven by lower Monday mood after ecstasy-use weekends (<i>t</i>(16) = 2.36, <i>p</i> = 0.031). This effect remained after adjusting for other drug use (β = -1.44, <i>p</i> = 0.018), but was attenuated when hours in bed were included (β = -0.82, <i>p</i> = 0.17), which independently predicted lower mood (β = -0.29, <i>p</i> = 0.019). Mediation analyses indicated that increased time in bed largely accounted for the Monday decrease. No differences were found for the BDI-II and BAI. Exploratory analyses showed reduced Thursday physical tension/agitation after ecstasy-use weekends (<i>p</i> = 0.008).<h4>Conclusions</h4>Residual mood effects appear Monday-specific and are attenuated when inactivity is considered, suggesting recovery-related behavior-not MDMA alone-may underlie post-use mood declines. Because increased time in bed may both reflect and influence low mood, directionality cannot be determined.

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