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Therapeutic drug monitoring of ganciclovir for postnatal cytomegalovirus infection in an extremely low birth weight infant: a case report.

Therapeutic drug monitoring of ganciclovir for postnatal cytomegalovirus infection in an extremely low birth weight infant: a case report.
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Sunada M, Kinoshita D, Furukawa N, Kihara M, Nishimura A, Moriuchi M, Moriuchi H,


Sunada M, Kinoshita D, Furukawa N, Kihara M, Nishimura A, Moriuchi M, Moriuchi H, (click to view)

Sunada M, Kinoshita D, Furukawa N, Kihara M, Nishimura A, Moriuchi M, Moriuchi H,

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BMC pediatrics 2016 08 2216(1) 141 doi 10.1186/s12887-016-0683-x

Abstract
BACKGROUND
Ganciclovir is a therapeutic choice for extremely premature infants with severe postnatal cytomegalovirus disease, but little is known about its optimal dose size and dosing interval for them.

CASE PRESENTATION
We treated an extremely premature female infant with postnatal cytomegalovirus infection with intravenous administration of ganciclovir since 49 days of life (postmenstrual age of 31 weeks). After ganciclovir treatment was initiated at a dose of 5 mg/kg every 12 h, cytomegalovirus loads in the peripheral blood were markedly decreased. However, since plasma ganciclovir trough level was too high, the interval was extended to every 24 h. Subsequently, the trough level and the estimated 12-h area under the concentration-time curve (AUC0-12) were decreased from 3.5 mg/L to 0.3 mg/L and 53.9 mg · h/L to 19.2 mg · h/L, respectively, resulting in an exacerbation of viremia and clinical condition. Adjustment of dosing interval from 24 h to 12 h led to a peak level of 4.2 mg/L, trough level of 1.1 mg/L, and AUC0-12 of 31.8 mg · h/L, resulting in a marked suppression of viral load.

CONCLUSIONS
Monitoring the therapeutic drug levels and cytomegalovirus loads is useful in obtaining a proper treatment effect and preventing overdosage during ganciclovir therapy in premature infants with postnatal cytomegalovirus infection.

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