Digoxin pharmacokinetics were studied in a pediatric population with an age range of 6 days to 1 year using the population pharmacokinetic approach. Digoxin data were analyzed by mixed-effects modeling according to a one-compartment steady-state pharmacokinetic model using NONMEM software. The final model selected for the population prediction of digoxin clearance in pediatric patients was as follows: [equation: see text] Individual empirical Bayesian estimates were generated on the basis of the population estimates and were used to correlate the optimum dose of digoxin and patient age according to the following equation: [equation: see text] This equation and its derived nomogram may be used for the initial dosing of digoxin in children aged between 0 and 1 year. The use of this nomogram in routine monitoring requires further pharmacokinetic and clinical validation.
Monitoring plasma levels of antiepileptic drugs for the treatment and prophylaxis of epilepsy is one of the strategies enabling clinical results to improve by reducing adverse affects and increasing effectiveness. The objective of this article is to review the basic aspects in the monitoring of antiepileptic drugs using a consensus document prepared and endorsed by the pharmacokinetics and pharmacogenetics working group (PK.gen) of the Sociedad Española de Farmacia Hospitalaria (Spanish Society of Hospital Pharmacists).
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