Overview
11 DESCRIPTION Valganciclovir for oral solution contains valganciclovir hydrochloride USP, a hydrochloride salt of the L-valyl ester of ganciclovir that exists as a mixture of two diastereomers. Ganciclovir is a synthetic guanine derivative active against CMV. Valganciclovir is available as a powder blend for oral solution, which when constituted with water as directed contains 50 mg/mL...
Mechanism of Action
12 CLINICAL PHARMACOLOGY 12.1 Mechanism of Action Valganciclovir is an antiviral drug with activity against CMV [see Microbiology ( 12.4 )] . 12.3 Pharmacokinetics Valganciclovir is a prodrug of ganciclovir. Valganciclovir C max and AUC are approximately 1% and 3% of those of ganciclovir, respectively. Pharmacokinetics in Adults: The pharmacokinetics of ganciclovir after administration of valganciclovir tablets have been evaluated in HIV- and CMV-seropositive patients, patients with AIDS and CMV retinitis, and in solid organ transplant patients (Table 10). Table 10 Ganciclovir Pharmacokinetics* in Healthy Volunteers and HIV-positive/CMV-positive Adults Administered Valganciclovir Tablets 900 mg Once Daily with Food PK parameter N Value (Mean ± SD) AUC 0-24h (mcg ∙ h/mL) 57 29.1 ± 9.
Indications
- 1 INDICATIONS AND USAGE Valganciclovir for oral solution is a deoxynucleoside analogue cytomegalovirus (CMV) DNA polymerase inhibitor indicated for: Pediatric Patients ( 1.2 ) Prevention of CMV disease in kidney and heart transplant patients at high risk. 1.2 Pediatric Patients Prevention of CMV Disease: Valganciclovir is indicated for the prevention of CMV disease in kidney transplant patients (4 months to 16 years of age) and heart transplant patients (1 month to 16 years of age) at high risk [see Clinical Studies ( 14.2 )] .
Common Doses
- 50 mg
- 150 mL
- 10 mg
- 0.2 mL
Dosage
2 DOSAGE AND ADMINISTRATION Pediatric Dosage ( 2.3 ) Prevention of CMV disease in kidney transplant patients 4 months to 16 years of age Dose once a day within 10 days of transplantation until 200 days post-transplantation according to dosage algorithm (note the calculation of creatinine clearance using a modified Schwartz formula in children) Prevention of CMV disease in heart transplant patients 1 month to 16 years of age Dose once a day within 10 days of transplantation until 100 days post-transplantation according to dosage algorithm (note the calculation of creatinine clearance using a...
Black Box Warning
WARNING: HEMATOLOGIC TOXICITY, IMPAIRMENT OF FERTILITY, FETAL TOXICITY, MUTAGENESIS AND CARCINOGENESIS Hematologic Toxicity: Severe leukopenia, neutropenia, anemia, thrombocytopenia, pancytopenia, and bone marrow failure including aplastic anemia have been reported in patients treated with valganciclovir for oral solution [see Warnings and Precautions ( 5.1 )]. Impairment of Fertility: Based on animal data and limited human data, valganciclovir for oral solution may cause temporary or permanent inhibition of spermatogenesis in males and suppression of fertility in females [see Warnings and...
Contraindications
- 4 CONTRAINDICATIONS Valganciclovir for oral solution is contraindicated in patients who have had a demonstrated clinically significant hypersensitivity reaction (e.g., anaphylaxis) to valganciclovir, ganciclovir, or any component of the formulation [see Adverse Reactions ( 6.1 )]. Hypersensitivity to valganciclovir or ganciclovir. ( 4 )
Side Effects
- 6 ADVERSE REACTIONS The following serious adverse reactions are discussed in greater detail in other sections of the labeling: Hematologic Toxicity [see Warnings and Precautions ( 5.1 ) ]. Acute Renal Failure [see Warnings and Precautions ( 5.2 ) ]. Impairment of Fertility [see Warnings and Precautions ( 5.3 )] . Fetal Toxicity [see Warnings and Precautions ( 5.4 )] . Mutagenesis and Carcinogenesis [see Warnings and Precautions ( 5.5 )] .
Interactions
- 7 DRUG INTERACTIONS In vivo drug-drug interaction studies were not conducted with valganciclovir. However, because valganciclovir is rapidly and extensively converted to ganciclovir, drug-drug interactions associated with ganciclovir will be expected for valganciclovir. Drug-drug interaction studies with ganciclovir were conducted in patients with normal renal function. Following concomitant administration of valganciclovir and other renally excreted drugs, patients with impaired renal function may have increased concentrations of ganciclovir and the coadministered drug.