Abstract:
:The pharmacokinetics of cefoperazone in normal subjects, and in patients with hepatic and renal dysfunction are reviewed. After intravenous administration of 2 g of cefoperazone, levels in serum ranged from 202 to 375 microgram/ml depending on the period of drug administration. After intramuscular injection of 2 g of cefoperazone, the mean peak serum level was 111 microgram/ml at 1.5 hours. At 12 hours after dosing, mean serum levels were still 2 to 4 microgram/ml. Cefoperazone was 90% bound to serum proteins. The apparent volume of distribution was 10 to 13L. The half-life of the drug varied from 1.6 to 2.4 hours; serum clearance was between 75 and 96 ml/min. Urinary excretion was rapid, but only 15 to 36% of the cefoperazone dose was recovered in the urine. Renal clearance ranged from 14 to 25 ml/min. Urine levels of cefoperazone in excess of 32 microgram/ml were maintained for at least 12 hours. Biliary levels of cefoperazone were many-fold higher than serum levels; peak bile concentrations from 675 to 6000 microgram/ml were obtained. Severe hepatic dysfunction was associated with a 2- to 4-fold increase in the half-life of cefoperazone. In patients with relatively complete biliary obstruction, over 90% of the dose was recovered in the urine. In contrast, the serum kinetics of cefoperazone were not significantly altered in patients with renal impairment. The human pharmacology of cefoperazone is similar to cephazolin in terms of serum concentrations, half-life, protein binding, and apparent volume of distribution, but markedly different in terms of biliary and renal excretion. Since biliary excretion is normally the primary route of cefoperazone elimination, dosage modification should only be required in the presence of severe biliary obstruction or concomitant renal and hepatic dysfunction.
journal_name
Drugsjournal_title
Drugsauthors
Craig WA,Gerber AUdoi
10.2165/00003495-198100221-00010subject
Has Abstractpub_date
1981-01-01 00:00:00pages
35-45eissn
0012-6667issn
1179-1950journal_volume
22 Suppl 1pub_type
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