Tacrolimus: Package Insert and Label Information

TACROLIMUS- tacrolimus capsule
Aphena Pharma Solutions — Tennessee, LLC

1 INDICATIONS AND USAGE

1.1 Prophylaxis of Organ Rejection in Kidney Transplant

Tacrolimus capsules, USP are indicated for the prophylaxis of organ rejection in patients receiving allogeneic kidney transplants. It is recommended that tacrolimus capsules be used concomitantly with azathioprine or mycophenolate mofetil (MMF) and adrenal corticosteroids [see Clinical Studies (14.1)]. Therapeutic drug monitoring is recommended for all patients receiving tacrolimus capsules [see Dosage and Administration (2.6)].

1.2 Prophylaxis of Organ Rejection in Liver Transplant

Tacrolimus capsules are indicated for the prophylaxis of organ rejection in patients receiving allogeneic liver transplants. It is recommended that tacrolimus capsules be used concomitantly with adrenal corticosteroids [see Clinical Studies (14.2)]. Therapeutic drug monitoring is recommended for all patients receiving tacrolimus capsules [see Dosage and Administration (2.6)].

1.3 Prophylaxis of Organ Rejection in Heart Transplant

Tacrolimus capsules are indicated for the prophylaxis of organ rejection in patients receiving allogeneic heart transplants. It is recommended that tacrolimus capsules be used concomitantly with azathioprine or mycophenolate mofetil (MMF) and adrenal corticosteroids [see Clinical Studies (14.3)]. Therapeutic drug monitoring is recommended for all patients receiving tacrolimus capsules [see Dosage and Administration (2.6)].

1.4 Limitations of Use

Tacrolimus capsules should not be used simultaneously with cyclosporine [see Dosage and Administration (2.5)].

Tacrolimus injection should be reserved for patients unable to take tacrolimus capsules orally [see Warnings and Precautions (5.11)].

Use with sirolimus is not recommended in liver and heart transplant. The safety and efficacy of tacrolimus capsules with sirolimus has not been established in kidney transplant [see Warnings and Precautions (5.12)].

2 DOSAGE AND ADMINISTRATION

2.1 Dosage in Adult Kidney, Liver, or Heart Transplant Patients

The initial oral dosage recommendations for adult patients with kidney, liver, or heart transplants along with recommendations for whole blood trough concentrations are shown in Table 1. The initial dose of tacrolimus capsules should be administered no sooner than 6 hours after transplantation in the liver and heart transplant patients. In kidney transplant patients, the initial dose of tacrolimus capsules may be administered within 24 hours of transplantation, but should be delayed until renal function has recovered. For blood concentration monitoring details see Dosage and Administration (2.6).

Table 1. Summary of Initial Oral Dosage Recommendations and Observed Whole Blood Trough Concentrations in Adults

* In a second smaller trial, the initial dose of tacrolimus was 0.15 to 0.2 mg/kg/day and observed tacrolimus concentrations were 6 to 16 ng/mL during month 1 to 3 and 5 to 12 ng/mL during month 4 to 12 [see Clinical Studies (14.1)].
Patient Population	Recommended Tacrolimus Capsules Initial Oral Dosage Note: daily doses should be administered as two divided doses, every 12 hours	Observed Tacrolimus Whole Blood Trough Concentrations
Adult kidney transplant patients
In combination with azathioprine	0.2 mg/kg/day	month 1 to 3: 7 to 20 ng/mL month 4 to 12: 5 to 15 ng/mL
In combination with MMF/IL-2 receptor antagonist *	0.1 mg/kg/day	month 1 to 12: 4 to 11 ng/mL
Adult liver transplant patients	0.10 to 0.15 mg/kg/day	month 1 to 12: 5 to 20 ng/mL
Adult heart transplant patients	0.075 mg/kg/day	month 1 to 3: 10 to 20 ng/mL month ≥ 4: 5 to 15 ng/mL

Dosing should be titrated based on clinical assessments of rejection and tolerability. Lower tacrolimus dosages than the recommended initial dosage may be sufficient as maintenance therapy. Adjunct therapy with adrenal corticosteroids is recommended early post-transplant.

The data in kidney transplant patients indicate that the Black patients required a higher dose to attain comparable trough concentrations compared to Caucasian patients (Table 2).

Table 2. Comparative Dose and Trough Concentrations Based on Race

Time After Transplant	Caucasian n = 114		Black n = 56
	Dose (mg/kg)	Trough Concentrations (ng/mL)	Dose (mg/kg)	Trough Concentrations (ng/mL)
Day 7	0.18	12	0.23	10.9
Month 1	0.17	12.8	0.26	12.9
Month 6	0.14	11.8	0.24	11.5
Month 12	0.13	10.1	0.19	11

Anaphylactic reactions have occurred with injectables containing castor oil derivatives, such as tacrolimus injection [see Warnings and Precautions (5.11)].

2.2 Dosage in Pediatric Liver Transplant Patients

The initial oral dosage recommendations for pediatric patients with liver transplants along with recommendations for whole blood trough concentrations are shown in Table 3. For blood concentration monitoring details see Dosage and Administration (2.6). If necessary, pediatric patients may start on an IV dose of 0.03 to 0.05 mg/kg/day.

Table 3. Summary of Initial Oral Dosage Recommendations and Observed Whole Blood Trough Concentrations in Children

Patient Population	Recommended Tacrolimus Capsules Initial Oral Dosage Note: daily doses should be administered as two divided doses, every 12 hours	Observed Tacrolimus Whole Blood Trough Concentrations
Pediatric liver transplant patients	0.15 to 0.20 mg/kg/day	Month 1 to 12: 5 to 20 ng/mL

Pediatric liver transplantation patients without pre-existing renal or hepatic dysfunction have required and tolerated higher doses than adults to achieve similar blood concentrations.

Experience in pediatric kidney and heart transplantation patients is limited.

2.3 Dosage Adjustment in Patients with Renal Impairment

Due to its potential for nephrotoxicity, consideration should be given to dosing tacrolimus capsules at the lower end of the therapeutic dosing range in patients who have received a liver or heart transplant and have pre-existing renal impairment. Further reductions in dose below the targeted range may be required.

In kidney transplant patients with post-operative oliguria, the initial dose of tacrolimus capsules should be administered no sooner than 6 hours and within 24 hours of transplantation, but may be delayed until renal function shows evidence of recovery.

2.4 Dosage Adjustments in Patients with Hepatic Impairment

Due to the reduced clearance and prolonged half-life, patients with severe hepatic impairment (Child Pugh ≥ 10) may require lower doses of tacrolimus capsules. Close monitoring of blood concentrations is warranted.

The use of tacrolimus capsules in liver transplant recipients experiencing post-transplant hepatic impairment may be associated with increased risk of developing renal insufficiency related to high whole blood concentrations of tacrolimus. These patients should be monitored closely and dosage adjustments should be considered. Some evidence suggests that lower doses should be used in these patients [see Dosage and Administration (2.1), Use in Specific Populations (8.7) and Clinical Pharmacology (12.3)].

2.5 Administration Instructions

It is recommended that patients initiate oral therapy with tacrolimus capsules if possible.

Initial dosage and observed tacrolimus whole blood trough concentrations for adults are shown in Table 1 and for pediatrics in Table 3 [see Dosage and Administration (2.1, 2.2)]; for blood concentration monitoring details in kidney transplant patients [see Dosage and Administration (2.1)].

It is important to take tacrolimus capsules consistently every day either with or without food because the presence and composition of food decreases the bioavailability of tacrolimus capsules [see Clinical Pharmacology (12.3)].

Patients should not eat grapefruit or drink grapefruit juice in combination with tacrolimus capsules [see Drug Interactions (7.2)].

Tacrolimus capsules should not be used simultaneously with cyclosporine. Tacrolimus capsules or cyclosporine should be discontinued at least 24 hours before initiating the other. In the presence of elevated tacrolimus capsules or cyclosporine concentrations, dosing with the other drug usually should be further delayed.

In patients unable to take oral tacrolimus capsules, therapy may be initiated with tacrolimus injection as a continuous IV infusion. If IV therapy is necessary, conversion from IV to oral tacrolimus capsules is recommended as soon as oral therapy can be tolerated. This usually occurs within 2 to 3 days. In patients receiving an IV infusion, the first dose of oral therapy should be given 8 to 12 hours after discontinuing the IV infusion.

2.6 Therapeutic Drug Monitoring

Monitoring of tacrolimus blood concentrations in conjunction with other laboratory and clinical parameters is considered an essential aid to patient management for the evaluation of rejection, toxicity, dose adjustments and compliance. Observed whole blood trough concentrations can be found in Table 1. Factors influencing frequency of monitoring include but are not limited to hepatic or renal dysfunction, the addition or discontinuation of potentially interacting drugs and the post-transplant time. Blood concentration monitoring is not a replacement for renal and liver function monitoring and tissue biopsies. Data from clinical trials show that tacrolimus whole blood concentrations were most variable during the first week post-transplantation.

The relative risks of toxicity and efficacy failure are related to tacrolimus whole blood trough concentrations. Therefore, monitoring of whole blood trough concentrations is recommended to assist in the clinical evaluation of toxicity and efficacy failure.

Methods commonly used for the assay of tacrolimus include high performance liquid chromatography with tandem mass spectrometric detection (HPLC/MS/MS) and immunoassays. Immunoassays may react with metabolites as well as parent compound. Therefore assay results obtained with immunoassays may have a positive bias relative to results of HPLC/MS. The bias may depend upon the specific assay and laboratory. Comparison of the concentrations in published literature to patient concentrations using the current assays must be made with detailed knowledge of the assay methods and biological matrices employed. Whole blood is the matrix of choice and specimens should be collected into tubes containing ethylene diamine tetraacetic acid (EDTA) anti-coagulant. Heparin anti-coagulation is not recommended because of the tendency to form clots on storage. Samples which are not analyzed immediately should be stored at room temperature or in a refrigerator and assayed within 7 days; see assay instructions for specifics. If samples are to be kept longer they should be deep frozen at -20° C. One study showed drug recovery > 90% for samples stored at -20° C for 6 months, with reduced recovery observed after 6 months.