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Pralatrexate Dailymed

  1. Human Prescription
  2. Folate Analog Metabolic Inhibitor
  3. Fresenius Kabi USA, LLC

Generic: pralatrexate is used for the treatment of Lymphoma, T-Cell, Peripheral

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  1. FDA Adverse Reactions

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1 Indications And Usage


Pralatrexate injection is indicated for the treatment of patients with relapsed or refractory peripheral T-cell lymphoma (PTCL).

This indication is approved under accelerated approval based on overall response rate [see Clinical Studies (14)]. Continued approval for this indication may be contingent upon verification and description of clinical benefit in a confirmatory trial(s).


Pralatrexate injection is a dihydrofolate reductase inhibitor indicated for the treatment of patients with relapsed or refractory peripheral T-cell lymphoma (PTCL).

This indication is approved under accelerated approval based on overall response rate. Continued approval for this indication may be contingent upon verification and description of clinical benefit in a confirmatory trial(s). (1)

2 Dosage And Administration


  • Supplement patients with vitamin B12 mg intramuscularly every 8-10 weeks starting 10 weeks before the first dose and folic acid 1 to 1.25 mg orally once daily starting 10 days before the first dose. (2.1)
  • The recommended dosage of Pralatrexate injection is 30 mg/m2 intravenously over 3 to 5 minutes once weekly for 6 weeks in 7-week cycles. (2.1)
  • For patients with severe renal impairment (GFR 15 to 29 mL/min/1.73 m2), reduce the Pralatrexate injection dose to 15 mg/m2 (2.1).

2.1 Important Dosing Information


Pretreatment Vitamin Supplementation


Folic Acid

Instruct patients to take folic acid 1 to 1.25 mg orally once daily beginning 10 days before the first dose of Pralatrexate injection. Continue folic acid during treatment with Pralatrexate injection and for 30 days after the last dose [see Warnings and Precautions (5.1, 5.2)].


Vitamin B 12

Administer vitamin B12 1 mg intramuscularly within 10 weeks prior to the first dose of Pralatrexate injection and every 8-10 weeks thereafter. Subsequent vitamin B12 injections may be given the same day as treatment with Pralatrexate injection [see Warnings and Precautions (5.1, 5.2)].


The recommended dosage of Pralatrexate injection is 30 mg/m2 intravenously over 3-5 minutes once weekly for 6 weeks in 7-week cycles until progressive disease or unacceptable toxicity.

2.3 Dosage Modifications for Renal Impairment and End Stage Renal Disease

  • Severe renal impairment (eGFR 15 to 29 mL/min/1.73 m2 by MDRD): Reduce the Pralatrexate injection dose to 15 mg/m2 [see Use in Specific Populations (8.6)].
  • End stage renal disease (ESRD: eGFR less than 15 mL/min/1.73 m2 by MDRD) with or without dialysis: Avoid administration. If the potential benefit of administration justifies the potential risk, monitor renal function and reduce the Pralatrexate injection dose based on adverse reactions [see Warnings and Precautions (5.6), Use in Specific Populations (8.6)].

2.4 Monitoring and Dosage Modifications for Adverse Reactions



Monitoring

Monitor complete blood cell counts and severity of mucositis at baseline and weekly. Perform serum chemistry tests, including renal and hepatic function, prior to the start of the first and fourth dose of each cycle.


Recommended Dosage Modifications

Do not administer Pralatrexate injection until:
  • Mucositis Grade 1 or less.
  • Platelet of 100,000/mcL or greater for first dose and 50,000/mcL or greater for all subsequent doses.
  • Absolute neutrophil count (ANC) of 1,000/mcL or greater.

Dosage modifications for adverse reactions are provided in Tables 1, 2, and 3.
Table 1 Pralatrexate Injection Dosage Modifications for Mucositis
a Based National Cancer Institute Common Terminology Criteria for Adverse Events (NCI CTCAE version 3.0)
Mucositis Grade a on Day of Treatment Action Recommended Dose upon Recovery to Grade 0 or 1
Patients Without Severe Renal Impairment Patients with Severe Renal Impairment
Grade 2 Omit dose Continue prior dose Continue prior dose
Grade 2 recurrence Omit dose 20 mg/m2 10 mg/m2
Grade 3 Omit dose 20 mg/m2 10 mg/m2
Grade 4 Stop therapy
Table 2 Pralatrexate Injection Dosage Modifications for Myelosuppression
G-CSF=granulocyte colony-stimulating factor; GM-CSF=granulocyte macrophage colony-stimulating factor
Blood Count on Day of Treatment Duration of Toxicity Action Recommended Dose Upon Recovery
Patients Without Severe Renal Impairment Patients with Severe Renal Impairment
Platelet less than 50,000/mcL 1 week Omit dose Continue prior dose Continue prior dose
2 weeks Omit dose 20 mg/m2 10 mg/m2
3 weeks Stop therapy
ANC 500 to 1,000/mcL and no fever 1 week Omit dose Continue prior dose Continue prior dose
ANC 500 to 1,000/mcL with fever or ANC less than 500/mcL 1 week Omit dose, give G-CSF or GM-CSF Continue prior dose with G-CSF or GM-CSF Continue prior dose with G-CSF or GM-CSF
2 weeks or recurrence Omit dose, give G-CSF or GM-CSF 20 mg/m2 with G-CSF or GM-CSF 10 mg/m2 with G-CSF or GM-CSF
3 weeks or2nd recurrence Stop therapy
Table 3 Pralatrexate Injection Dosage Modifications for All Other Adverse Reactions
a Based on NCI CTCAE version 3.0
Toxicity Grade a on Day of Treatment Action Recommended Dose upon Recovery to Grade 2 or Lower
Patients Without Severe Renal Impairment Patients with Severe Renal Impairment
Grade 3 Omit dose 20 mg/m2 10 mg/m2
Grade 4 Stop therapy

2.5 Preparation and Administration


Parenteral drug products should be inspected visually for particulate matter and discoloration prior to administration, whenever solution and container permit. Do not use any vials exhibiting particulate matter or discoloration.

Pralatrexate injection is a hazardous drug. Follow applicable special handling and disposal procedures.1 If Pralatrexate injection comes in contact with the skin, immediately and thoroughly wash with soap and water. If Pralatrexate injection comes in contact with mucous membranes, flush thoroughly with water.

Aseptically withdraw the calculated dose from the appropriate number of vial(s) into a syringe for immediate use. Do not dilute Pralatrexate injection.

Administer undiluted Pralatrexate injection intravenously over 3-5 minutes via the side port of a free-flowing 0.9% Sodium Chloride Injection.

After withdrawal of dose, discard vial(s) including any unused portion.

3 Dosage Forms And Strengths


Injection: 40 mg/2 mL (20 mg/mL) and 20 mg/mL clear yellow sterile solution in single-dose vial


Injection: 20 mg/1 mL or 40 mg/2 mL in a single-dose vial (3)

4 Contraindications


None


None. (4)

5 Warnings And Precautions


  • Myelosuppression: Monitor complete blood counts and omit and/or reduce dose based on ANC and platelet count. (2.4, 5.1)
  • Mucositis:Monitor at least weekly. Omit and/or reduce dose for grade 2 or higher mucositis. (2.4, 5.2)
  • Dermatologic reactions: Reactions, including fatal reactions, occurred and may be progressive and increase in severity with further treatment. Monitor closely and withhold or discontinue Pralatrexate injection based on severity. (2.4, 5.3)
  • Tumor lysis syndrome: Monitor patients who are increased risk and treat promptly. (5.4)
  • Hepatic toxicity: Monitor for liver function tests. Omit until recovery, adjust or discontinue therapy based on severity. (2.4, 5.5)
  • Risk of increased toxicity with renal impairment: Avoid Pralatrexate injection in patients with end stage renal disease with or without dialysis. If the potential benefit of administration justifies the potential risk, monitor renal function and reduce the Pralatrexate injection dose based on adverse reactions. (2.3, 2.4, 5.6)
  • Embryo-fetal toxicity: Can cause fetal harm. Advise patients of the potential risk to a fetus and to use an effective method of contraception. (5.7, 8.1, 8.3)

5.1 Myelosuppression


Pralatrexate injection can cause myelosuppression, manifested by thrombocytopenia, neutropenia, and/or anemia.

Administer vitamin B12 and instruct patients to take folic acid to reduce the risk of treatment-related myelosuppression [see Dosage and Administration (2.1)].

Monitor complete blood counts and omit and/or reduce the dose based on ANC and platelet count prior to each dose [see Dosage and Administration (2.4)].

5.2 Mucositis


Pralatrexate injection can cause mucositis [see Adverse Reactions (6.1)].

Administer vitamin B12 and instruct patients to take folic acid to reduce the risk of mucositis [see Dosage and Administration (2.1)].

Monitor for mucositis weekly and omit and/or reduce the dose for grade 2 or higher mucositis [see Dosage and Administration (2.4)].

5.3 Dermatologic Reactions


Pralatrexate injection can cause severe dermatologic reactions, which may result in death. These dermatologic reactions have been reported in clinical studies (2.1% of 663 patients) and post marketing experience, and have included skin exfoliation, ulceration, and toxic epidermal necrolysis (TEN) [see Adverse Reactions (6.1, 6.2)]. They may be progressive and increase in severity with further treatment and may involve skin and subcutaneous sites of known lymphoma.

Monitor closely for dermatologic reactions. Withhold or discontinue Pralatrexate injection based on severity [see Dosage and Administration (2.4)].

5.4 Tumor Lysis Syndrome


Pralatrexate injection can cause tumor lysis syndrome (TLS). Monitor patients who are at increased risk of TLS and treat promptly.

5.5 Hepatic Toxicity


Pralatrexate injection can cause hepatic toxicity and liver function test abnormalities [see Adverse Reactions (6.1)]. Persistent liver function test abnormalities may be indicators of hepatic toxicity and require dose modification or discontinuation.

Monitor liver function tests. Omit dose until recovery, adjust or discontinue therapy based on the severity of the hepatic toxicity [see Dosage and Administration (2.4)].

5.6 Risk of Increased Toxicity with Renal Impairment


Patients with severe renal impairment (eGFR 15 to < 30 mL/min/1.73 m2 based on MDRD) may be at greater risk for increased exposure and adverse reactions. Reduce Pralatrexate injection dosage in patients with severe renal impairment [see Dosage and Administration (2.3)].

Serious adverse reactions, including TEN and mucositis, were reported in patients with end stage renal disease (ESRD) undergoing dialysis who were administered Pralatrexate injection. Avoid Pralatrexate injection in patients with ESRD with or without dialysis. If the potential benefit of administration justifies the potential risk, monitor renal function and reduce the Pralatrexate injection dose based on adverse reactions [see Dosage and Administration (2.3)].

5.7 Embryo-Fetal Toxicity


Based on findings in animals and its mechanism of action, Pralatrexate injection can cause fetal harm when administered to a pregnant woman. Pralatrexate injection was embryotoxic and fetotoxic in rats and rabbits. Advise pregnant women of the potential risk to a fetus. Advise females of reproductive potential to use effective contraception during treatment with Pralatrexate injection and for 6 months after the last dose. Advise males with female partners of reproductive potential to use effective contraception during treatment with Pralatrexate injection and for 3 months after the last dose [see Use in Specific Populations (8.1, 8.3)].

6 Adverse Reactions


The following clinically significant adverse reactions are described elsewhere in the labeling:
  • Myelosuppression [see Warnings and Precautions (5.1)]
  • Mucositis [see Warnings and Precautions (5.2)]
  • Dermatologic Reactions [see Warnings and Precautions (5.3)]
  • Tumor Lysis Syndrome [see Warnings and Precautions (5.4)]
  • Hepatic Toxicity [see Warnings and Precautions (5.5)]


Most common adverse reactions (>35%) are mucositis, thrombocytopenia, nausea, and fatigue. (6.1)

To report SUSPECTED ADVERSE REACTIONS, contact Fresenius Kabi USA, LLC at 1-800-551-7176 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch

6.1 Clinical Trials Experience


Because clinical studies are conducted under widely varying conditions, adverse reaction rates observed in the clinical studies of a drug cannot be directly compared to rates in the clinical studies of another drug and may not reflect the rates observed in practice.


Peripheral T-cell Lymphoma

The safety of Pralatrexate injection was evaluated in Study PDX-008 [see Clinical Studies (14)]. Patients received Pralatrexate injection 30 mg/m2 once weekly for 6 weeks in 7-week cycles. The median duration of treatment was 70 days (range: 1 day to 1.5 years). The majority of patients (69%, n = 77) remained at the target dose for the duration of treatment. Overall, 85% of scheduled doses were administered.

Forty-four percent of patients (n = 49) experienced a serious adverse event while on study or within 30 days after their last dose of Pralatrexate injection. The most common serious adverse events (> 3%), regardless of causality, were pyrexia, mucositis, sepsis, febrile neutropenia, dehydration, dyspnea, and thrombocytopenia. One death from cardiopulmonary arrest in a patient with mucositis and febrile neutropenia was reported in this trial. Across clinical trials, deaths from mucositis, febrile neutropenia, sepsis, and pancytopenia occurred in 1.2% of patients who received doses ranging from 30 mg/m2 to 325 mg/m2.

Twenty-three percent of patients (n = 25) discontinued treatment with Pralatrexate injection due to adverse reactions. The most frequent adverse reactions reported as the reason for discontinuation of treatment were mucositis (6%) and thrombocytopenia (5%).

The most common adverse reactions (> 35%) were mucositis, thrombocytopenia, nausea, and fatigue.

Table 4 summarizes the adverse reactions in Study PDX-008.
Table 4 Adverse Reactions in (≥ 10%) in Patients Who Received Pralatrexate Injection in Study PDX-008
a Mucositis includes stomatitis or mucosal inflammation of the gastrointestinal and genitourinary tracts.
b Five patients with platelets < 10,000/mcL.
c Liver function test abnormal includes increased ALT, increased AST, and increased transaminases
Pralatrexate Injection N=111
All Grades (%) Grade 3 (%) Grade 4 (%)
Any Adverse Reaction 100 43 31
   Mucositisa 70 17 4
   Thrombocytopeniab 41 14 19b
   Nausea 40 4 0
   Fatigue 36 5 2
   Anemia 34 15 2
   Constipation 33 0 0
   Pyrexia 32 1 1
   Edema 30 1 0
   Cough 28 1 0
   Epistaxis 26 0 0
   Vomiting 25 2 0
   Neutropenia 24 13 7
   Diarrhea 21 2 0
   Dyspnea 19 7 0
   Anorexia 15 3 0
   Hypokalemia 15 4 1
   Rash 15 0 0
   Pruritus 14 2 0
   Pharyngolaryngeal pain 14 1 0
   Liver function test    abnormalc 13 5 0
   Abdominal pain 12 4 0
   Pain in extremity 12 0 0
   Back pain 11 3 0
   Leukopenia 11 3 4
   Night sweats 11 0 0
   Asthenia 10 1 0
   Upper respiratory tract    infection 10 1 0
   Tachycardia 10 0 0

6.2 Postmarketing Experience


The following adverse reactions have been identified during postapproval use of Pralatrexate injection. Because these reactions are reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate their frequency or establish a causal relationship to drug exposure.

Dermatologic Reactions: Toxic epidermal necrolysis.

7 Drug Interactions


  • Avoid coadministration with probenecid or nonsteroidal anti-inflammatory drugs. If coadministration is unavoidable, monitor for increased risk of adverse reactions. (7.1)

7.1 Effects of Other Drugs on Pralatrexate Injection


Coadministration of Pralatrexate injection with probenecid increased pralatrexate plasma concentrations [see Clinical Pharmacology (12.3)], which may increase the risk of adverse reactions. Avoid coadministration with probenecid or nonsteroidal anti-inflammatory drugs. If coadministration is unavoidable, monitor for increased risk of adverse reactions.

8 Use In Specific Populations


  • Lactation: Advise not to breastfeed. (8.2)

8.1 Pregnancy


Risk Summary

Based on findings from animal studies and its mechanism of action [see Clinical Pharmacology (12.1)], Pralatrexate injection can cause fetal harm when administered to a pregnant woman. There are insufficient data on Pralatrexate injection use in pregnant women to evaluate for a drug- associated risk. Pralatrexate injection was embryotoxic and fetotoxic in rats and rabbits when administered during organogenesis at doses about 1.2% (0.012 times) of the clinical dose on a mg/m2 basis. Advise pregnant women of the potential risk to a fetus.

The estimated background risk of major birth defects and miscarriage for the indicated population(s) is unknown. All pregnancies have a background risk of birth defect, loss, or other adverse outcomes. In the U.S. general population, the estimated background risk of major birth defects and miscarriage in clinically recognized pregnancies is 2-4% and 15-20%, respectively.


Data


Animal Data

Pralatrexate was embryotoxic and fetotoxic in rats at intravenous doses of 0.06 mg/kg/day (0.36 mg/m2/day or about 1.2% of the clinical dose on a mg/m2 basis) given on gestation days 7 through 20. Treatment with pralatrexate caused a dose-dependent decrease in fetal viability manifested as an increase in late, early, and total resorptions. There was also a dosedependent increase in post-implantation loss. In rabbits, intravenous doses of 0.03 mg/kg/day (0.36 mg/m2/day) or greater given on gestation days 8 through 21 also caused abortion and fetal lethality. This toxicity manifested as early and total resorptions, post-implantation loss, and a decrease in the total number of live fetuses.

8.2 Lactation



Risk Summary

There is no data on the presence of pralatrexate in human milk or its effects on the breastfed child or milk production. Because of the potential for serious adverse reactions in a breastfed child, advise women not to breastfeed during treatment with Pralatrexate injection and for 1 week after the last dose.

8.3 Females and Males of Reproductive Potential


Pralatrexate injection can cause fetal harm when administered to a pregnant woman [see Use in Specific Populations (8.1 )].


Pregnancy Testing

Verify pregnancy status in females of reproductive potential prior to initiation of Pralatrexate injection.


Contraception


Females

Advise females of reproductive potential to use effective contraception during treatment with Pralatrexate injection and for 6 months following the last dose.


Males

Advise males with female partners of reproductive potential to use effective contraception during treatment with Pralatrexate injection and for 3 months following the last dose.

8.4 Pediatric Use


The safety and effectiveness of Pralatrexate injection in pediatric patients have not been established.

8.5 Geriatric Use


In the Study PDX-008, 36% of patients (n = 40) were 65 years of age and over. No overall differences in efficacy and safety were observed in patients based on age (< 65 years compared with ≥ 65 years). Due to the contribution of renal excretion to overall clearance of pralatrexate (approximately 34%), age-related decline in renal function may lead to a reduction in clearance and a commensurate increase in plasma exposure. In general, dose selection for an elderly patient should be cautious, reflecting the greater frequency of decreased hepatic, renal, or cardiac function, and of concomitant disease or other drug therapy. Since elderly patients may be at higher risk, monitor more closely. Omit dose and subsequently adjust or discontinue therapy for adverse reactions [see Dosage and Administration (2.4)].

8.6 Renal Impairment


No dosage modification is recommended for patients with mild or moderate renal impairment (eGFR 30 to 59 mL/min/1.73 m2 based on MDRD). For patients with severe renal impairment (eGFR 15 to 29 mL/min/1.73 m2), reduce the recommended dose of Pralatrexate injection [see Dosage and Administration (2.3)].

Serious adverse drug reactions, including TEN and mucositis, have been reported in patients with ESRD undergoing dialysis. Avoid the use of Pralatrexate injection in patients with ESRD with or without dialysis. If the potential benefit of administration justifies the potential risk, monitor renal function and reduce the Pralatrexate injection dose based on adverse reactions [see Dosage and Administration (2.3), Warnings and Precautions (5.6)].

10 Overdosage


No specific information is available on the treatment of overdosage of Pralatrexate injection. If an overdose occurs, general supportive measures should be instituted as deemed necessary by the treating healthcare provider. Based on Pralatrexate injection's mechanism of action, consider the prompt administration of leucovorin.

11 Description


Pralatrexate is a dihydrofolate reductase inhibitor. Pralatrexate has the chemical name (2S)-2[[4-[(1RS)-1-[(2, 4-diaminopteridin-6-yl)methyl]but-3- ynyl]benzoyl]amino]pentanedioic acid. The molecular formula is C23H23N7O5 and the molecular weight is 477.48 g/mol. Pralatrexate is a 1:1 racemic mixture of S- and R- diastereomers at the C10 position (indicated with *). The structural formula is as follows:

Pralatrexate is an off-white to yellow solid. It is soluble in aqueous solutions at pH 6.5 or higher. Pralatrexate is practically insoluble in chloroform and ethanol. The pKa values are 3.25, 4.76, and 6.17.

Pralatrexate Injection is supplied as a preservative-free, sterile, isotonic, non-pyrogenic clear yellow aqueous solution contained in a clear glass single-dose vial (Type I) for intravenous use. Each 1 mL of solution contains 20 mg of pralatrexate, sufficient sodium chloride to achieve an isotonic (280-300 mOsm) solution, and sufficient sodium hydroxide, and hydrochloric acid if needed, to adjust and maintain the pH at 7.5-8.5. Pralatrexate Injection is supplied as either 20 mg (1 mL) or 40 mg (2 mL) single-dose vials at a concentration of 20 mg/mL.

12 Clinical Pharmacology


12.1 Mechanism of Action


Pralatrexate is a folate analog metabolic inhibitor that competitively inhibits dihydrofolate reductase. It is also a competitive inhibitor for polyglutamylation by the enzyme folylpolyglutamyl synthetase. This inhibition results in the depletion of thymidine and other biological molecules the synthesis of which depends on single carbon transfer.

12.2 Pharmacodynamics


Pralatrexate exposure-response relationship and the time course of pharmacodynamics responses are unknown.

12.3 Pharmacokinetics


Pralatrexate is a racemic mixture of S- and R-diastereomers. The pharmacokinetics of pralatrexate at the recommended dosage of 30 mg/m2 once weekly have been evaluated in 10 patients with PTCL. Pralatrexate total systemic exposure (AUC) and maximum plasma concentration (Cmax) increased proportionally over a dose range 30 to 325 mg/m2 (10.8 times the approved recommended dosage). No accumulation of pralatrexate was observed.


Distribution

Steady-state volume of distribution of pralatrexate S- and R-diastereomers is 105 L and 37 L, respectively. Protein binding of pralatrexate is approximately 67% in vitro.


Elimination

The total systemic clearance of pralatrexate diastereomers was 417 mL/min (S-diastereomer) and 191 mL/min (R-diastereomer). The terminal elimination half-life of pralatrexate was 12-18 hours (coefficient of variance [CV] = 62-120%).


Metabolism

Pralatrexate is not significantly metabolized by CYP450 isozymes or glucuronidases in vitro.


Excretion

Following a single dose of Pralatrexate injection 30 mg/m2, approximately 34% of the pralatrexate dose was excreted unchanged into urine. Following a radiolabeled pralatrexate dose, 39% (CV = 28%) of the dose was recovered in urine as unchanged pralatrexate and 34% (CV = 88%) in feces as unchanged pralatrexate and/or any metabolites. 10% (CV = 95%) of the dose was exhaled over 24 hours.


Specific Populations

No clinically meaningful effect on the pharmacokinetics of pralatrexate was observed based on sex.

The effect of hepatic impairment on the pharmacokinetics of pralatrexate has not been studied.


Patients with Renal Impairment

Following administration of a single dose of Pralatrexate injection, mean exposures of the pralatrexate S-diastereomer and R-diastereomer were comparable in patients with mild to moderate (eGFR 30 to 59 mL/min/1.73 m2 based on MDRD) renal impairment as compared with severe (eGFR 15 to 29 mL/min/1.73 m2) renal impairment. The mean fraction of the administered dose excreted as unchanged diastereomers in urine (fe) decreased with declining renal function [see Use in Specific Populations (8.6)].


Drug Interaction Studies


Clinical Studies

Coadministration of probenecid (an inhibitor of multidrug resistance-associated protein 2 [MRP2] in vitro) resulted in delayed clearance of pralatrexate.


In Vitro Studies

Cytochrome P450 (CYP) Enzymes: Pralatrexate does not induce or inhibit CYP enzymes.

Transporter Systems: Pralatrexate is a substrate for BCRP, MRP2, MRP3, and OATP1B3, but is not a substrate of P-gp, OATP1B1, OCT2, OAT1, or OAT3.

Pralatrexate inhibits MRP2 and MRP3, but does not inhibit P-gp, BCRP, OCT2, OAT1, OAT3, OATP1B1, or OATP1B3. MRP3 is a transporter that may affect the transport of etoposide and teniposide.

13 Nonclinical Toxicology


13.1 Carcinogenesis, Mutagenesis, Impairment of Fertility


Carcinogenesis

Carcinogenicity studies have not been performed with pralatrexate.


Mutagenesis

Pralatrexate did not cause mutations in the Ames test or the Chinese hamster ovary cell chromosome aberration assay. Nevertheless, these tests do not reliably predict genotoxicity for this class of compounds. Pralatrexate did not cause mutations in the mouse micronucleus assay.


Impairment of Fertility

No fertility studies have been performed.

14 Clinical Studies


The efficacy of Pralatrexate injection was evaluated in Study PDX-008, an open-label, single-arm, multi-center, international trial that enrolled patients with relapsed or refractory PTCL. One hundred and eleven patients received Pralatrexate injection 30 mg/m2 intravenously over 3 to 5 minutes once weekly by for 6 weeks in 7-week cycles until disease progression or unacceptable toxicity. Of the 111 patients treated, 109 patients were evaluable for efficacy. Evaluable patients had histologically confirmed PTCL by independent central review using the Revised European American Lymphoma (REAL) World Health Organization (WHO) disease classification, and relapsed or refractory disease after at least one prior treatment.

The major efficacy outcome measure was overall response rate (complete response, complete response unconfirmed, and partial response) as assessed by International Workshop Criteria (IWC). An additional efficacy outcome measure was duration of response. Response assessments were scheduled at the end of cycle 1 and then every other cycle (every 14 weeks). Duration of response was measured from the first day of documented response to disease progression or death. Response and disease progression were evaluated by independent central review using the IWC.

The median age was 59 years (range: 21 to 85); 68% were male; 72% were White, 13% were Black, 8% were Hispanic and 5% were Asian. Patients had a baseline Eastern Cooperative Oncology Group (ECOG) performance status of 0 (39%), 1 (44%), or 2 (17%). The median time from initial diagnosis to study entry was 1.3 years (range 24 days to 26.8 years). The median number of prior systemic therapies was 3 (range 1 to 12). Approximately 24% of patients (n = 27) did not have evidence of response to any previous therapy. Approximately 63% of patients (n = 70) did not have evidence of response to their most recent prior therapy before entering the study.

Efficacy results are provided in Table 5.
Table 5 Efficacy Results for Study PDX-008 per Independent Central Review (IWC)
Fourteen patients went off treatment in cycle 1; 2 patients were unevaluable for response by IWC due to insufficient materials provided to central review.
CR = Complete Response, CRu = Complete Response unconfirmed, PR = Partial Response
Evaluable Patients (N=109)
N (%) 95% CI Median Duration of Response Range of Duration of Response
Overall Response
CR+CRu+PR 29 (27) 19, 36 287 days (9.4 months) 1-503 days
CR/CRu 9 (8)
PR 20 (18)
Responses ≥ 14 weeks
CR+CRu+PR 13 (12) 7, 20 Not Reached 98-503 days
CR/CRu 7 (6)
PR 6 (6)

The initial response assessment was scheduled at the end of cycle 1. Of the responders, 66% responded within cycle 1. The median time to first response was 45 days (range 37-349 days).

15 References

  • “OSHA Hazardous Drugs.†OSHA. http://www.osha.gov/SLTC/hazardousdrugs/index.html.

16 How Supplied/storage And Handling


Pralatrexate Injection is available in single-dose clear glass vials containing pralatrexate at a concentration of 20 mg/mL as a preservative-free, sterile, clear yellow solution individually packaged for intravenous use in the following presentations:
Product Code Unit of Sale Strength
550101 NDC 65219-550-01 20 mg/1 mL
552102 NDC 65219-552-02 40 mg/2 mL

Store refrigerated at 2-8°C (36-46°F) [see USP Controlled Cold Temperature] in original carton to protect from light.

Pralatrexate Injection is a hazardous drug. Follow applicable special handling and disposal procedures.1

17 Patient Counseling Information


Advise the patient to read the FDA-approved patient labeling (Patient Information).


Folic Acid and Vitamin B 12 Supplementation

Advise patients treated with Pralatrexate injection to take folic acid and vitamin B12 to reduce the risk of possible side effects [see Dosage and Administration (2.1)].


Myelosuppression

Inform patients of the risk of myelosuppression and to immediately contact their healthcare provider should any signs of infection develop, including fever. Inform patients to contact their healthcare provider if bleeding or symptoms of anemia occur [see Warnings and Precautions (5.1)].


Mucositis

Inform patients of the signs and symptoms of mucositis. Instruct patients on ways to reduce the risk of its development, and on ways to maintain nutrition and control discomfort from mucositis if it occurs [see Warnings and Precautions (5.2)].


Dermatologic Reactions

Advise patients about the risks for and the signs and symptoms of dermatologic reactions. Instruct patients to immediately notify their healthcare provider if any skin reactions occur [see Warnings and Precautions (5.3)].


Tumor Lysis Syndrome

Inform patients about the risk of and the signs and symptoms of tumor lysis syndrome. Patients should be instructed to notify their healthcare provider if they experience these symptoms [see Warnings and Precautions (5.4)].


Concomitant Medications

Patients should be instructed to inform their healthcare provider if they are taking any concomitant medications including prescription drugs (such as trimethoprim/sulfamethoxazole and probenecid) and nonprescription drugs (such as nonsteroidal anti-inflammatory drugs) [see Drug Interactions (7.1)].


Embryo-Fetal Toxicity

Advise pregnant women and females of reproductive potential of the potential risk to a fetus. Advise females or reproductive potential to inform their healthcare provider of a known or suspected pregnancy [see Warnings and Precautions (5.7) and Use in Specific Populations (8.1)].

Advise females patients of reproductive potential to use effective contraception during treatment with Pralatrexate injection and for 6 months after the final dose [see Use in Specific Populations (8.3)].

Advise males with female partners of reproductive potential to use effective contraception during treatment with Pralatrexate injection and for at least 3 months after the final dose [see Use in Specific Populations (8.3)]


Lactation

Advise females women not to breastfeed during treatment with Pralatrexate injection and for 1 week after the final dose [see Use in Specific Populations (8.2)].

Manufactured for:



Lake Zurich, IL 60047

www.fresenius-kabi.com/us

Made in Germany

451756

Spl Patient Package Insert Section

This Patient Information has been approved by the U.S. Food and Drug Administration.
Revised: 09/2022
Patient Information Pralatrexate Injection (PRA-luh-TREK-sayt)
What is Pralatrexate injection? Pralatrexate injection is a prescription used to treat people with a type of cancer called peripheral T-cell lymphoma (PTCL) that does not go away, gets worse, or comes back after use of another cancer treatment.It is not known if Pralatrexate injection is safe and effective in children.
Before you receive Pralatrexate injection, tell your healthcare provider about all of your medical conditions, including if you:
  • have kidney problems, including end-stage renal disease (ESRD)
  • are pregnant or plan to become pregnant. Pralatrexate injection can harm your unborn baby. Females who are able to become pregnant:
    • Your healthcare provider may do a pregnancy test before you start treatment with Pralatrexate injection.
    • You should use effective birth control (contraception) during treatment with Pralatrexate injection and for 6 months after the last dose. Talk to your healthcare provider about the best birth control methods you can use during this time.
    • Tell your healthcare provider if you become pregnant or think you maybe pregnant during treatment with Pralatrexate injection.

    Males with female partners who are able to become pregnant should use effective birth control during treatment with Pralatrexate injection and for 3 months after the last dose of Pralatrexate injection.
  • are breastfeeding or plan to breastfeed. It is not known if Pralatrexate injection passes into your breast milk. Do not breastfeed during treatment with Pralatrexate injection and for 1 week after the last dose. Talk to your healthcare provider about the best way to feed your baby during treatment with Pralatrexate injection.
Tell your healthcare provider about all the medicines you take, including prescription and over-the-counter medicines, vitamins, and herbal supplements. Some medicines may affect how Pralatrexate injection works. Especially tell your healthcare provider if you take:
  • sulfamethoxazole trimethoprim
  • non-steroidal anti-inflammatory (NSAIDs) medicines
  • probenecid
Know the medicines you take. Keep a ul of them and show it to your healthcare provider or pharmacist each time you start a new medicine.
How will I receive Pralatrexate injection?
  • Pralatrexate injection will be given to you by your healthcare provider as an intravenous (IV) injection into your vein over 3 to 5 minutes.
  • Pralatrexate injection is usually given in cycles, one time each week for 6 weeks, with no treatment on the 7th week.
  • Your healthcare provider will treat you with folic acid and vitamin B12 before and during your treatment with Pralatrexate injection to help reduce the risk of possible side effects.
    • You will take folic acid by mouth for 10 days before your first dose of Pralatrexate injection. Continue taking folic acid during treatment with Pralatrexate injection and for 30 days after the last dose.
    • Your healthcare provider will give you a vitamin B12 injection into your muscle (intramuscular). You will get your first vitamin B12 injection 10 weeks before your first dose of Pralatrexate injection and every 8 to 10 weeks during treatment with Pralatrexate injection.
  • Your healthcare provider will do blood tests before and during treatment with Pralatrexate injection.
Your healthcare provider may stop treatment, delay treatment, or change your dose of Pralatrexate injection based on results of your blood tests and if you have certain side effects.
What are the possible side effects of Pralatrexate injection? Pralatrexate injection may cause serious side effects, including:
  • Low blood cell counts: Your healthcare provider will do blood tests to check your blood cell counts before and during treatment with Pralatrexate injection. Tell your healthcare provider right away if you develop any signs of infection, fever, bleeding or tiredness during treatment with Pralatrexate injection.
  • Redness and sores of the mucous membrane lining of the mouth, lips,throat, digestive tract, and genitals (mucositis). Mucositis is common with Pralatrexate injection and can be severe. Tell your healthcare provider if you develop redness or painful sores in your mouth or throat, or have trouble speaking, eating or drinking. Your healthcare provider will tell you about ways to reduce your risk of getting mucositis, and how to maintain nutrition and help control the discomfort from mucositis.
  • Severe skin reactions. Pralatrexate injection can cause severe skin reactions that may lead to death. In people with lymphoma, severe skin reactions may happen on and under your skin. Tell your healthcare provider right away if you develop any of the following skin reactions:
    • rash
    • peeling and loss of skin
    • sores
    • bulers
  • Tumor Lysis Syndrome (TLS). TLS is caused by the fast breakdown of certain types of cancer cells. Your healthcare provider may do blood tests to check you for TLS and treat you if needed.
  • Liver problems. Your healthcare provider will monitor you for liver problems during treatment with Pralatrexate injection.
  • Increased risk of serious reactions in people with kidney problems. People with severe kidney problems may have a greater risk for increased serious reactions during treatment with Pralatrexate injection.
The most common side effects of Pralatrexate injection include: low platelet blood counts, nausea, and tiredness.These are not all of the possible side effects of Pralatrexate injection.Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
General information about the safe and effective use of Pralatrexate injection. Medicines are sometimes prescribed for purposes other than those uled in a Patient Information leaflet. This Patient Information leaflet summarizes the most important information about Pralatrexate injection. If you would like more information, talk with your healthcare provider. You can ask your healthcare provider or pharmacist for information about Pralatrexate injection that is written for health professionals.

What are the ingredients in Pralatrexate injection? Active ingredient: pralatrexate Inactive ingredients: sodium chloride, sodium hydroxide, and hydrochloric acid.Manufactured for: Lake Zurich, IL 60047www.fresenius-kabi.com/usMade in Germany451757

Package Label.principal Display Panel


PRINCIPAL DISPLAY PANEL – Pralatrexate Injection 20 mg/mL – Carton

NDC 65219-550-01

PralatrexateInjection

20 mg/mL

For intravenous use

Rx only 1 mL

Package Label.principal Display Panel


PRINCIPAL DISPLAY PANEL – Pralatrexate Injection 20 mg/mL – Vial Label

NDC 65219-550-01

PralatrexateInjection

20 mg/mL

1 mLRx only

Package Label.principal Display Panel


PRINCIPAL DISPLAY PANEL – Pralatrexate Injection 40 mg/2 mL – Carton

NDC 65219-552-02

PralatrexateInjection

40 mg/2 mL (20 mg/mL)

For intravenous use

1 mL

Package Label.principal Display Panel


PRINCIPAL DISPLAY PANEL – Pralatrexate Injection 40 mg/2 mL – Vial Label

NDC 65219-552-02PralatrexateInjection40 mg/2 mL (20 mg/mL)

2 mLRx only

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