Cohort Total dose (free base DMT) Duration of IV infusion
1
9 mg
Phase 1: 6 mg over 5 min Phase 2: 3 mg over 5 min
2
12 mg
Phase 1: 6 mg over 5 min Phase 2: 6 mg over 5 min
3
17 mg
Phase 1: 6 mg over 5 min Phase 2: 11 mg over 5 min
4
21.5 mg
Phase 1: 6 mg over 5 min Phase 2: 15.5 mg over 5 min