Fig. 2. “Active” mivacurium concentrations after a mivacurium infusion are displayed for each of the two infusions (open triangles for infusion #1, closed triangles for infusion #2) in three groups. Values are expressed as the percentage of the mivacurium concentration at steady state during that infusion. With neostigmine, concentrations after second infusion were larger than those after first infusion 2, 4, and 7 min after antagonist administration. With edrophonium, concentrations after infusion #2 were larger than those after infusion #1 only 2 min after antagonist administration.