Effects of Dimethyltryptamine in Healthy Subjects
Keywords
Coimriú
Cur síos
N,N-dimethyltryptamine (DMT) is a naturally-occurring psychedelic substance widely used in recreational and spiritual settings in the form of Ayahuasca. Similar to lysergic acid diethylamide (LSD) or psilocybin, DMT is considered a tool to induce an altered state of consciousness of interest in psychological and psychiatric research. Pharmacologically, DMT interacts with the serotonin 5-HT2A receptor similar to other classic hallucinogens including LSD and psilocybin. The main difference of DMT in comparison with LSD or psilocybin is inactivity when administered orally without monoamine oxidase (MAO) A inhibition and its short action when administered intravenously or by inhalation. In Ayahuasca, DMT is consumed iin combination with harmala alkaloids that inhibit MAO to increase the oral bioavailability of DMT and to prolong its action after oral use. Alternatively, an intravenous administration regime including a bolus and a one hour maintenance perfusion has been proposed to induce a stable and prolonged DMT experience, allowing to study the psychological and autonomic acute effects of DMT. Also, the maintenance perfusion administration allows to end an altered state of consciousness quickly. In the present study this model will be tested using four modified administration schemes. The goal of this study is to experimentally test different intravenous DMT administration schedules to investigate the subjective and autonomic effects of DMT in healthy subjects. The study is expected to inform researchers on dosing regimes of intravenous DMT as a tool to examine alterations of the mind and is of interest for psychology and psychiatry. This study does not intend to provide any therapeutic benefit for the participants. Currently, no study has validly determined the elimination half-life of DMT and other pharmacokinetic parameters. The key aim is to test the dose-response of DMT as well as the difference between the loading dose bolus and no-bolus perfusion conditions regarding pharmacokinetic, subjective, and autonomic effects including psychological and physical tolerability.
Dátaí
| Fíoraithe Deireanach: | 03/31/2020 |
| Cuireadh isteach den chéad uair: | 04/05/2020 |
| Clárú Measta Curtha isteach: | 04/14/2020 |
| Arna chur suas ar dtús: | 04/19/2020 |
| Nuashonrú Deireanach Curtha isteach: | 04/26/2020 |
| Nuashonrú Deireanach Postáilte: | 04/28/2020 |
| Dáta Tosaigh an Staidéir Iarbhír: | 09/30/2020 |
| Dáta Críochnaithe Bunscoile Measta: | 09/30/2021 |
| Dáta Críochnaithe an Staid Mheasta: | 12/30/2021 |
Coinníoll nó galar
Idirghabháil / cóireáil
Drug: Dimethyltryptamine (DMT)
Drug: Saline
Céim
Grúpaí Láimhe
| Lámh | Idirghabháil / cóireáil |
|---|---|
| Placebo Comparator: Placebo Bolus of 0 mg DMT + perfusion of 0 mg/min DMT over 60 min, resulting in a total dose of 0 mg DMT. | |
| Experimental: Low dose Intravenous bolus of 0 mg DMT + perfusion of 0.6 mg/min DMT over 90 min, resulting in a total dose of 54 mg DMT. | |
| Experimental: Low dose with bolus Intravenous bolus of 15 mg DMT + perfusion of 0.6 mg/min DMT over 90 min, resulting in a total dose of 69 mg DMT. | |
| Experimental: High dose Intravenous bolus of 0 mg DMT + perfusion of 1 mg/min DMT over 90 min, resulting in a total dose of 90 mg DMT. | |
| Experimental: High dose with bolus Intravenous bolus of 25 mg DMT + perfusion of 1 mg/min DMT over 90 min, resulting in a total dose of 115 mg DMT. |
Critéir Incháilitheachta
| Aois Incháilithe le haghaidh Staidéir | 25 Years Chun 25 Years |
| Gnéas Incháilithe le haghaidh Staidéir | All |
| Glacann Oibrithe Deonacha Sláintiúla | Sea |
| Critéir | Inclusion Criteria: - Age between 25 and 65 years old - Sufficient understanding of the German language - Understanding of procedures and risks associated with the study - Willing to adhere to the protocol and signing of the consent form - Willing to refrain from the consumption of illicit psychoactive substances during the study - Abstaining from xanthine-based liquids from the evenings prior to the study sessions and during the sessions - Willing not to operate heavy machinery within 6 h of DMT administration - Willing to use double-barrier birth control throughout study participation - Body mass index between 18-29 kg/m2 Exclusion Criteria: - Chronic or acute medical condition - Current or previous major psychiatric disorder - Psychotic disorder or bipolar disorder in first-degree relatives - Hypertension (SBP>140/90 mmHg) or hypotension (SBP<85 mmHg) - Hallucinogenic substance use (not including cannabis) more than 20 times or any time within the previous two months - Pregnancy or current breastfeeding - Participation in another clinical trial (currently or within the last 30 days) - Use of medication that may interfere with the effects of the study medication - Tobacco smoking (>10 cigarettes/day) - Consumption of alcoholic beverages (>20 drinks/week) |
Toradh
Bearta Toraidh Príomhúla
1. Altered states of consciousness profile [150 minutes]
2. Subjective effect ratings over time [150 minutes]
Bearta Torthaí Tánaisteacha
1. Subjective mood ratings [150 minutes]
2. Mystical-type experiences [150 minutes]
3. Autonomic effects I [150 minutes]
4. Autonomic effects II [150 minutes]
5. Plasma levels of DMT [150 minutes]
6. Plasma levels of blood-derived neurotrophic factor (BDNF) [150 minutes]
7. Plasma levels of oxytocin [60 minutes]
8. Renal clearance of DMT [3 hours]
9. Effect moderation through personality traits I [Baseline]
10. Effect moderation through personality traits II [Baseline]
11. Effect moderation through personality traits III [Baseline]
12. Effect moderation through personality trait IV [Baseline]
13. Effect moderation through personality trait V [Baseline]
14. Effect moderation through personality trait VI [Baseline]
15. Effect moderation through personality trait VII [Baseline]
16. Adverse effects [150 minutes]
