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The aim of the study is to compare hangover effects of MDMA users versus those who used other drugs, or alcohol only at New Year's Eve. The week after New Years Eve, every day participants complete a questionnaire about the presence and severity of potential hangover symptoms. At day 1, demographics and alcohol and drug use at New Years Eve were recorded. On day 7, the Brief Symptom Inventory (BSI) is completed to asses last weeks mood. After 4 weeks, after a drug-free week, the BSI is completed again to serve as a reference.
A convenience sample was invited by e-mail to participate in the study, via the organizer of a private New Years Party.It was attempted to include as much participants as possible. Hence, no sampling method was applied when recruiting participants.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| MDMA | poly drug users that used MDMA at New Years Eve | ||
| Other Drugs | poly drug users that used drugs at New Years Eve, but not MDMA | ||
| Alcohol | poly drug users that used no drugs at New Years Eve, but did consume alcohol |
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Inclusion Criteria:
Exclusion Criteria:
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Recreational poly-drug users who were guests at a privat New Years Eve party
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| Name | Affiliation | Role |
|---|---|---|
| Joris C Verster, PhD | Utrecht University | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Utrecht University | Utrecht | Utrecht | 3584CG | Netherlands |
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