Pharmacological Interaction Between Doxazosin and Methylenedioxymethamphetamine (MDMA)

• Status: Completed
• Trial end date: 2012-01-01
• Target enrollment: 0
• Participant gender: All

Summary

The purpose of this study is to determinate the effect of a pre-treatment with doxazosin, a alpha1-adrenergic receptor blocker, on the pharmacodynamics and pharmacokinetics of 3,4-methylenedioxymethamphetamine (MDMA, "ecstasy"). The investigators hypothesize that doxazosin will attenuate the cardiovascular and subjective response to MDMA.

• Phase: Phase 1
• Accepts Healthy Volunteers?: Accepts Healthy Volunteers

Details

• Lead Sponsor: University Hospital, Basel, Switzerland
• Treatments: Doxazosin; N-Methyl-3,4-methylenedioxyamphetamine

Criteria

Inclusion Criteria:

• Sufficient understanding of the German language

• Subjects understand the procedures and the risks associated with the study

• Participants must be willing to adhere to the protocol and sign the consent form

• Participants must be willing to refrain from taking illicit psychoactive substances during the study.

• Participants must be willing to drink only alcohol-free liquids and no xanthine-containing liquids (such as coffee, black or green tea, red bull, chocolate) after midnight of the evening before the study session. Subjects must agree not to smoke tobacco for 1 h before and 4 hours after MDMA administration.

• Participants must be willing not to drive a traffic vehicle in the evening of the study day.

• Women of childbearing potential must have a negative pregnancy test at the beginning of the study and must agree to use an effective form of birth control. Pregnancy tests are repeated before each study session.

• Body mass index: 18-25 kg/m2

Exclusion Criteria:

• Chronic or acute medical condition including clinically relevant abnormality in physical exam, laboratory values, or ECG. In particular: Hypertension (>140/90 mmHg). Personal or first-grade history of seizures. Cardiac or neurological disorder.

• Current or previous psychotic or affective disorder

• Psychotic or affective disorder in first-degree relatives

• Prior illicit drug use (except Tetrahydrocannabinol-containing products) more than 5 times or any time within the previous 2 months.

• Pregnant or nursing women.

• Participation in another clinical trial (currently or within the last 30 days)

• Use of medications that are contraindicated or otherwise interfere with the effects of the study medications (monoamine oxidase inhibitors, antidepressants, sedatives etc.)