Voriconazoledosage

Dosage in Adults Infection Maintenance Dose Oral tablets Oral suspension Invasive Aspergillosis 200 mg every 12 hours 5 mL every 12 hours Candidemia in nonneutropenics and other deep tissue Candida infections 200 mg every 12 hours 5 mL every 12 hours Scedosporiosis and Fusariosis 200 mg every 12 hours 5 mL every 12 hours Esophageal Candidiasis 200 mg every 12 hours 5 mL every 12 hours Adult patients weighing less than 40 kg: oral maintenance dose 100 mg or 150 mg every 12 hours Hepatic Impairment: Use half the maintenance dose in adult patients with mild to moderate hepatic impairment (Child-Pugh Class A and B) Renal Impairment: Avoid intravenous administration in adult patients with moderate to severe renal impairment (creatinine clearance <50 mL/min) Dosage in Pediatric Patients 2 years of age and older For pediatric patients 2 to less than 12 years of age and 12 to 14 years of age weighing less than 50 kg see Table below. Infection Maintenance Dose Oral tablets Oral suspension Invasive Aspergillosis 9 mg/kg every 12 hours (maximum dose of 350 mg every 12 hours) 0.225 mL/kg every 12 hours [maximum dose of 8.75 mL (350 mg) every 12 hours] Candidemia in nonneutropenics and other deep tissue Candida infections Scedosporiosis and Fusariosis Esophageal Candidiasis 9 mg/kg every 12 hours (maximum dose of 350 mg every 12 hours) 0.225 mL/kg every 12 hours [maximum dose of 8.75 mL (350 mg) every 12 hours] For pediatric patients aged 12 to 14 years weighing greater than or equal to 50 kg and those aged 15 years and older regardless of body weight use adult dosage. Dosage adjustment of voriconazole tablets in pediatric patients with renal or hepatic impairment has not been established

2.1 Important

Administration Instructions for Use in All Patients Administer voriconazole tablets at least one hour before or after a meal.

2.3 Recommended

Dosing Regimen in Adults Invasive aspergillosis and serious fungal infections due to Fusarium spp. and Scedosporium apiospermum See Table 1. Therapy must be initiated with the specified loading dose regimen of intravenous voriconazole on Day 1 followed by the recommended maintenance dose (RMD) regimen. Intravenous treatment should be continued for at least 7 days. Once the patient has clinically improved and can tolerate medication given by mouth, the oral tablet form of voriconazole may be utilized. The recommended oral maintenance dose of 200 mg achieves a voriconazole exposure similar to 3 mg/kg intravenously; a 300 mg oral dose achieves an exposure similar to 4 mg/kg intravenously. Candidemia in non-neutropenic patients and other deep tissue Candida infections See Table 1. Patients should be treated for at least 14 days following resolution of symptoms or following last positive culture, whichever is longer. Esophageal Candidiasis See Table 1. Patients should be treated for a minimum of 14 days and for at least 7 days following resolution of symptoms.

Table 1: Recommended Dosing Regimen (Adults) a Increase dose when voriconazole tablets are coadministered with phenytoin or efavirenz; Decrease dose in patients with hepatic impairment b In healthy volunteer studies, the 200 mg oral every 12 hours dose provided an exposure (AUCτ) similar to a 3 mg/kg intravenous infusion every 12 hours dose; the 300 mg oral every 12 hours dose provided an exposure (AUCτ) similar to a 4 mg/kg intravenous infusion every 12 hours dose c Adult patients who weigh less than 40 kg should receive half of the oral maintenance dose. d In a clinical study of IA, the median duration of intravenous voriconazole therapy was 10 days (range 2 to 85 days). The median duration of oral voriconazole therapy was 76 days (range 2 to 232 days). e In clinical trials, patients with candidemia received 3 mg/kg intravenous infusion every 12 hours as primary therapy, while patients with other deep tissue Candida infections received 4 mg/kg every 12 hours as salvage therapy. Appropriate dose should be based on the severity and nature of the infection. f Not evaluated in patients with EC. Infection Loading Dose Maintenance Dose a,b Intravenous infusion Intravenous infusion Oral tablets c Oral suspension Invasive Aspergillosis d 6 mg/kg every 12 hours for the first 24 hours 4 mg/kg every 12 hours 200 mg every 12 hours 5 mL every 12 hours Candidemia in nonneutropenic patients and other deep tissue Candida infections 6 mg/kg every 12 hours for the first 24 hours 3-4 mg/kg every 12 hours e 200 mg every 12 hours 5 mL every 12 hours Esophageal Candidiasis Not Evaluated f Not Evaluated f 200 mg every 12 hours 5 mL every 12 hours Scedosporiosis and Fusariosis 6 mg/kg every 12 hours for the first 24 hours 4 mg/kg every 12 hours 200 mg every 12 hours 5 mL every 12 hours Method for Adjusting the Dosing Regimen in Adults If the patient’s response is inadequate, the oral maintenance dose for voriconazole tablets or oral suspension may be increased from 200 mg (or 5 mL) every 12 hours to 300 mg (or 7.5 mL) every 12 hours. For adult patients weighing less than 40 kg, the oral maintenance dose for voriconazole tablets or oral suspension may be increased from 100 mg (or 2.5 mL) every 12 hours to 150 mg (or 3.75 mL) every 12 hours. If the patient is unable to tolerate 300 mg (or 7.5 mL) orally every 12 hours, reduce the oral maintenance dose of voriconazole tablets or oral suspension by 50 mg (or 1.25 mL) steps to a minimum of 200 mg (or 5 mL) every 12 hours for adult patients weighing more than 40 kg or to 100 mg (or 2.5 mL) every 12 hours for adult patients weighing less than 40 kg. If the patient is unable to tolerate 4 mg/kg intravenously every 12 hours, reduce the intravenous maintenance dose to 3 mg/kg every 12 hours.

2.4 Recommended

Dosing Regimen in Pediatric Patients The recommended dosing regimen for pediatric patients 2 to less than 12 years of age and 12 to 14 years of age with body weight less than 50 kg is shown in Table 2. For pediatric patients 12 to 14 years of age with a body weight greater than or equal to 50 kg and those 15 years of age and above regardless of body weight, administer the adult dosing regimen of voriconazole tablets.

Table 2: Recommended Dosing Regimen for Pediatric Patients 2 to less than 12 years of age and 12 to 14 years of age with body weight less than 50 kg^ ^ Based on a population pharmacokinetic analysis in 112 immunocompromised pediatric patients aged 2 to less than 12 years of age and 26 immunocompromised pediatric patients aged 12 to less than 17 years of age. * In the Phase 3 clinical trials, patients with IA received intravenous (IV) treatment for at least 6 weeks and up to a maximum of 12 weeks. Patients received IV treatment for at least the first 7 days of therapy and then could be switched to oral voriconazole therapy. † Study treatment for primary or salvage invasive candidiasis and candidemia (ICC) or EC consisted of intravenous voriconazole, with an option to switch to oral therapy after at least 5 days of IV therapy, based on subjects meeting switch criteria. For subjects with primary or salvage ICC, voriconazole was administered for at least 14 days after the last positive culture. A maximum of 42 days of treatment was permitted. Patients with primary or salvage EC were treated for at least 7 days after the resolution of clinical signs and symptoms. A maximum of 42 days of treatment was permitted. Loading Dose Maintenance Dose Intravenous infusion Intravenous infusion Oral tablets Oral suspension Invasive Aspergillosis* 9 mg/kg every 12 hours for the first 24 hours 8 mg/kg every 12 hours after the first 24 hours 9 mg/kg every 12 hours (maximum dose of 350 mg every 12 hours) 0.225 mL/kg every 12 hours [maximum dose of 8.75 mL (350 mg) every 12 hours] Candidemia in nonneutropenics and other deep tissue Candida infections † Scedosporiosis and Fusariosis Esophageal Candidiasis † Not Evaluated 4 mg/kg every 12 hours 9 mg/kg every 12 hours (maximum dose of 350 mg every 12 hours) 0.225 mL/kg every 12 hours [maximum dose of 8.75 mL (350 mg) every 2 hours] Initiate therapy with an intravenous infusion regimen. Consider an oral regimen only after there is a significant clinical improvement. Note that an 8 mg/kg intravenous dose will provide voriconazole exposure approximately 2-fold higher than a 9 mg/kg oral dose. The oral dose recommendation for children is based on studies in which voriconazole was administered as the powder for oral suspension formulation. Bioequivalence between the voriconazole powder for oral suspension and voriconazole tablets has not been investigated in a pediatric population. Oral bioavailability may be limited in pediatric patients 2 to 12 years with malabsorption and very low body weight for age. In that case, intravenous voriconazole administration is recommended. Method for Adjusting the Dosing Regimen in Pediatric Patients Pediatric Patients 2 to less than 12 years of age and 12 to 14 years of age with body weight less than 50 kg If patient response is inadequate and the patient is able to tolerate the initial intravenous maintenance dose, the maintenance dose may be increased by 1 mg/kg steps. If patient response is inadequate and the patient is able to tolerate the oral maintenance dose, the dose may be increased by 1 mg/kg (0.025 mL/kg) steps or 50 mg (1.25 mL) steps to a maximum of 350 mg (8.75 mL) every 12 hours. If patients are unable to tolerate the initial intravenous maintenance dose, reduce the dose by 1 mg/kg steps. If patients are unable to tolerate the oral maintenance dose, reduce the dose by 1 mg/kg (0.025 mL/kg) or 50 mg (1.25 mL) steps. Pediatric patients 12 to 14 years of age weighing greater than or equal to 50 kg and 15 years of age and older regardless of body weight: Use the optimal method for titrating dosage recommended for adults.

2.5 Dosage Modifications in

Patients With Hepatic Impairment Adults The maintenance dose of voriconazole should be reduced in adult patients with mild to moderate hepatic impairment, Child-Pugh Class A and B. There are no PK data to allow for dosage adjustment recommendations in patients with severe hepatic impairment (Child-Pugh Class C). Duration of therapy should be based on the severity of the patient’s underlying disease, recovery from immunosuppression, and clinical response. Adult patients with baseline liver function tests (ALT, AST) of up to 5 times the upper limit of normal (ULN) were included in the clinical program. Dose adjustments are not necessary for adult patients with this degree of abnormal liver function, but continued monitoring of liver function tests for further elevations is recommended. It is recommended that the recommended voriconazole loading dose regimens be used, but that the maintenance dose be halved in adult patients with mild to moderate hepatic cirrhosis (Child-Pugh Class A and B). Voriconazole has not been studied in adult patients with severe hepatic cirrhosis (Child-Pugh Class C) or in patients with chronic hepatitis B or chronic hepatitis C disease. Voriconazole has been associated with elevations in liver function tests and with clinical signs of liver damage, such as jaundice. Voriconazole tablets should only be used in patients with severe hepatic impairment if the benefit outweighs the potential risk. Patients with hepatic impairment must be carefully monitored for drug toxicity. Pediatric Patients Dosage adjustment of voriconazole tablets in pediatric patients with hepatic impairment has not been established.

2.6 Dosage Modifications in

Patients With Renal Impairment Adult Patients The pharmacokinetics of orally administered voriconazole tablets are not significantly affected by renal impairment. Therefore, no adjustment is necessary for oral dosing in patients with mild to severe renal impairment. In patients with moderate or severe renal impairment (creatinine clearance <50 mL/min) who are receiving an intravenous infusion of voriconazole, accumulation of the intravenous vehicle, SBECD, occurs. Oral voriconazole should be administered to these patients, unless an assessment of the benefit/risk to the patient justifies the use of intravenous voriconazole. Serum creatinine levels should be closely monitored in these patients, and, if increases occur, consideration should be given to changing to oral voriconazole therapy. Voriconazole and the intravenous vehicle, SBECD, are dialyzable. A 4-hour hemodialysis session does not remove a sufficient amount of voriconazole to warrant dose adjustment. Pediatric Patients Dosage adjustment of voriconazole tablets in pediatric patients with renal impairment has not been established.

2.7 Dosage Adjustment

When Coadministered With Phenytoin or Efavirenz The maintenance dose of voriconazole should be increased when coadministered with phenytoin or efavirenz. Use the optimal method for titrating dosage.