Figure 3. Tolerance to Δ9-THC in the formalin test.
Effects of once daily repeated injections of 6 mg/kg Δ9-THC (n=4–5 per time point) in the acute (Phase I; A–B) and inflammatory (Phase II; C–D) phase of the formalin test in male (A,C) and female (B,D) mice compared to vehicle (VEH) (n=9–15) in wild-type (WT) (lined bars) and S426A/S430A mutant (open bars) mice. Bars represent mean +/− SEM. Asterisk(s) indicate significant differences from vehicle; * p<0.05, **p< 0.01, ***p<0.001, ****p<0.0001.