Figure 7From: Effect of filtration on morphine and particle content of injections prepared from slow-release oral morphine tabletsParticles 5 μm or larger in syringe filtrates. Numbers of particles (in thousands) estimated to be in the total injection volumes, prepared without a tablet (control) or with cold or hot extraction. Upper panel, 0.45 filtrate; lower panel, 0.22 μm filtrate. Total injection volumes are given in Table 1. Values are mean ± SD (N = 3).Back to article page