Delta-9-tetrahydrocannabinol (THC) slowed reaction times (main effect, ∗P < 0.05) and increased resting pulse rate slightly (main effect, ∗P < 0.05). There was no significant effect of capsaicin on reaction times. However, there was a slight increase in resting pulse rate during capsaicin-induced sensitisation compared to control (main effect, ∗P < 0.05). Error bars represent SEM. Black and clear bars represent THC and placebo, respectively.