Pharmacokinetics of ceftriaxone following intravenous administration of a 3 g dose
The pharmacokinetic parameters of total (bound and unbound) and free (unbound) ceftriaxone in six healthy volunteers after intravenous injection of 39 were compared with low-dose data from a previous study. The dose-dependent behaviour of total drug was considerably more pronounced after the 3 gram dose. In contrast, total body clearance (Cl S F =258 ml/min), renal clearance (Cl R F =170 ml/min) and volume of distribution (V D(β) F =168 l) of free (unbound) drug did not differ from the data reported earlier. There was no significant change in biological half-life (t1/2(β)=7.8 h) or in the fraction excreted unchanged in urine (fu=0.67).
Key wordscephalosporin ceftriaxone protein binding non-linear pharmacokinetics intravenous injection plasma levels
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