50
Participants
Start Date
May 1, 2026
Primary Completion Date
December 31, 2028
Study Completion Date
May 31, 2029
Placebo
Placebo: A single dose of placebo to match kratom (over-encapsulated placebo in 32 opaque 00 capsules) will be administered orally.
Oxycodone HCl
Active Control: A single 20 mg dose of oxycodone (1 X 20 mg tablet over-encapsulated placebo in 32 opaque 00 capsules) will be administered orally.
Oxycodone HCl
Active Control: A single 40 mg dose of oxycodone (2 X 20 mg tablets over-encapsulated placebo in 32 opaque 00 capsules) will be administered orally.
Kratom 8
Kratom: A single 8 g dose of kratom (in 32 opaque 00 capsules) will be administered orally.
Kratom 12g
Kratom: A single 12 g dose of kratom (in 32 opaque 00 capsules) will be administered orally.
Kratom 16g
Kratom: A single 16 g dose of kratom (in 32 opaque 00 capsules) will be administered orally.
Michael E DeBakey VA Medical Center, Houston
Baylor College of Medicine
OTHER
Christopher D. Verrico
OTHER