Neurodynamics of Prosocial Emotional Processing Following Serotonergic Stimulation With N,N-Dimethyltryptamine (DMT) and Harmine in Healthy Subjects

Inclusion criteria

• Willing and capable to give informed consent for the participation in the study after it has been thoroughly explained
• Little or no previous experiences with psychedelic substances
• Body mass index (BMI) between 18.5 and 25
• Willing to refrain from drinking caffeine 3 days and alcohol the day before testing session, from drinking alcohol and caffeinated drinks at the testing days and from consuming psychoactive substances or other medications for 2 weeks before testing days and for the duration of the study
• Able and willing to comply with all study requirements
• Informed consent form was signed
• Good knowledge of the German language

Exclusion criteria

• Previous significant adverse response to a hallucinogenic drug
• Participation in another study where pharmaceutical compounds will be given
• Self or first-degree relatives with present or antecedent psychiatric disorders
• History of head trauma or fainting
• Recent cardiac or brain surgery
• Current use of medication or psychotropic substances (including nicotine addiction)
• Presence of major internal or neurological disorders (including sepsis, pheochromocytoma, thyrotoxicosis, drug-induced fibrosis, familiar or basilar artery migraine)
• Cardiovascular disease (hypertonia, coronary artery disease, heart insufficiency, myocardial infarction, coronary spastic angina)
• Peripheral vascular disease (thromboangiitis obliterans, luetic arteritis, severe arteriosclerosis, thrombophlebitis, Raynaud's disease)
• Liver or renal disease