Clinical Trial

Preliminary Characterization of Commercial Kratom Extract Products

Terminated
View on ClinicalTrials.gov →
Why the trial stopped
Original PI left study team, ending project funding.
Summary
To understand the acute subjective, physiological, and cognitive effects of commercial kratom extract products among US adults who consume these products regularly, and to understand how these products are metabolized by the human body.
Protocol Amendment History 5 changes
critical Trial terminated 2026-08-14
critical Trial terminated: Original PI left study team, ending project funding. 2026-08-14
notable Enrollment reduced: 16 -> 2 participants 2026-08-14
notable Primary completion moved earlier: 2027-11-11 -> 2026-07-23 2026-08-14
minor Completion moved earlier: 2028-11-01 -> 2026-07-23 2026-08-14
Trial Details
NCT Number NCT06640569
Lead Sponsor Johns Hopkins University
Conditions Kratom Pharmacodynamics, Kratom Pharmacokinetics
Enrollment 2 participants
Start Date 2024-11-11
Primary Completion 2026-07-23 (estimated)
Study Completion 2026-07-23 (estimated)
Updated on ClinicalTrials.gov 2026-08-13