Figure 3.
The means of pain tolerance, in seconds, immediately before the drink consumption and at 1 and 2 hours after consumption for kratom and placebo drinks. The error bars represent 95% confidence intervals.
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.