Figure 1

Plasma concentration–time curves of buprenorphine (A) and norbuprenorphine (B) after a single injection of BSR 0.15 mg/kg (n = 8), EXR 0.10 mg/kg (n = 6), EXR 0.15 mg/kg (n = 3), or EXR 0.20 mg/kg (n = 8). Data reported as mean ± standard deviation.