Pemetrexed Disodium Drug Information
Generic name: PEMETREXED DISODIUM
Uses of Pemetrexed Disodium
Non-Squamous Non-Small Cell Lung Cancer (NSCLC) Pemetrexed for injection is indicated for: in combination with pembrolizumab and platinum chemotherapy, for the initial treatment of patients with metastatic non-squamous non-small cell lung cancer (NSCLC), with no EGFR or ALK genomic tumor aberrations. in combination with cisplatin for the initial treatment of patients with locally advanced or metastatic, nonsquamous, NSCLC. as a single agent for the maintenance treatment of patients with locally advanced or metastatic, non-squamous NSCLC whose disease has not progressed after four cycles of platinum-based first-line chemotherapy. as a single agent for the treatment of patients with recurrent, metastatic non-squamous, NSCLC after prior chemotherapy.
Mesothelioma Pemetrexed for injection is indicated, in combination with cisplatin, for the initial treatment of patients with malignant pleural mesothelioma whose disease is unresectable or who are otherwise not candidates for curative surgery.
Dosage & Administration of Pemetrexed Disodium
Recommended Dosage for Non-Squamous NSCLC •
The recommended dose of pemetrexed for injection when administered with pembrolizumab and platinum chemotherapy for the initial treatment of metastatic non-squamous NSCLC in patients with a creatinine clearance (calculated by Cockcroft-Gault equation) of 45 mL/min or greater is 500 mg/m 2 as an intravenous infusion over 10 minutes administered after pembrolizumab and prior to carboplatin or cisplatin on Day 1 of each 21-day cycle for 4 cycles. Following completion of platinum-based therapy, pemetrexed for injection may be administered as maintenance therapy, alone or with pembrolizumab, until disease progression or unacceptable toxicity. Pembrolizumab should be administered prior to pemetrexed for injection when given on the same day.
Please refer to the full prescribing information for pembrolizumab and for carboplatin.
Renal Impairment • Pemetrexed for injection dosing recommendations are provided for patients with a creatinine clearance (calculated by Cockcroft-Gault equation) of 45 mL/min or greater. There is no recommended dose for patients whose creatinine clearance is less than 45 mL/min.
Premedication and Concomitant Medications to Mitigate Toxicity Vitamin Supplementation •Initiate folic acid 400 mcg to 1000 mcg orally once daily, beginning 7 days before the first dose of pemetrexed for injection and continuing until 21 days after the last dose of pemetrexed for injection. •Administer vitamin B 12, 1 mg intramuscularly, 1 week prior to the first dose of pemetrexed for injection and every 3 cycles thereafter. Subsequent vitamin B 12 injections may be given the same day as treatment with pemetrexed for injection. Do not substitute oral vitamin B 12 for intramuscular vitamin B 12.
Corticosteroids • Administer dexamethasone 4 mg orally twice daily for three consecutive days, beginning the day before each pemetrexed for injection administration.
Dosage Modification of Ibuprofen in Patients with Mild to Moderate Renal Impairment Receiving Pemetrexed for Injection In patients with creatinine clearances between 45 mL/min and 79 mL/min, modify administration of ibuprofen as follows: • Avoid administration of ibuprofen for 2 days before, the day of, and 2 days following administration of pemetrexed for injection. • Monitor patients more frequently for myelosuppression, renal, and gastrointestinal toxicity, if concomitant administration of ibuprofen cannot be avoided.
Dosage Modifications for Adverse Reactions
Obtain complete blood count on Days 1, 8, and 15 of each cycle. Assess creatinine clearance prior to each cycle. Do not administer pemetrexed for injection if the creatinine clearance is less than 45 mL/min.
Upon recovery, modify the dosage of pemetrexed for injection in the next cycle as specified in Table 1. For dosing modifications for cisplatin, refer to the prescribing information for cisplatin. Table 1: Recommended Dosage Modifications for Adverse Reactions a Severe and life-threatening Skin Toxicity Permanently discontinue Interstitial Pneumonitis Permanently discontinue a National Cancer Institute Common Toxicity Criteria for Adverse Events version 2 (NCI CTCAE v2).
Preparation for Administration • Pemetrexed for injection is a hazardous drug. Follow applicable special handling and disposal procedures. 1 • Calculate the dose of pemetrexed for injection and determine the number of vials needed. • Reconstitute pemetrexed for injection to achieve a concentration of 25 mg/mL as follows: - Reconstitute each 100-mg vial with 4.2 mL of 0.9% Sodium Chloride Injection, USP (preservative-free) - Reconstitute each 500-mg vial with 20 mL of 0.9% Sodium Chloride Injection, USP (preservative-free) - Reconstitute each 1 g vial with 40 mL of 0.9% Sodium Chloride Injection, USP (preservative-free) - Do not use calcium-containing solutions for reconstitution. • Gently swirl each vial until the powder is completely dissolved. The resulting solution is clear and ranges in color from colorless to yellow or green-yellow.
Discard vial after 24 hours. • Inspect reconstituted product visually for particulate matter and discoloration prior to further dilution. If particulate matter is observed, discard vial. • Withdraw the calculated dose of pemetrexed for injection from the vial(s) and discard vial with any unused portion. • Further dilute pemetrexed for injection with 0.9% Sodium Chloride Injection (preservative-free) to achieve a total volume of 100 mL for intravenous infusion. • Store diluted, reconstituted product under refrigerated conditions 2 to 8°C (36 to 46°F) or 20° to 25°C (68° to 77°F) for no more than 24 hours from the time of reconstitution. Discard after 24 hours.
| Toxicity in Most Recent Treatment Cycle | Pemetrexed for Injection Dose Modification for Next Cycle |
|---|---|
| Myelosuppressive toxicity [see Warnings and Precautions (5.1)] | |
| ANC less than 500/mm3 and platelets greater than or equal to 50,000/mm 3 OR Platelet count less than 50,000/mm3 without bleeding. | 75% of previous dose |
| Platelet count less than 50,000/mm3 with bleeding | 50% of previous dose |
| Recurrent Grade 3 or 4 myelosuppression after 2 dose reductions | Discontinue |
| Non-hematologic toxicity | |
| Any Grade 3 or 4 toxicities EXCEPT mucositis or neurologic toxicity OR Diarrhea requiring hospitalization | 75% of previous dose |
| Grade 3 or 4 mucositis | 50% of previous dose |
| Renal toxicity [see Warnings and Precautions (5.2)] | Withhold until creatinine clearance is 45 mL/min or greater |
| Grade 3 or 4 neurologic toxicity | Permanently discontinue |
| Recurrent Grade 3 or 4 non-hematologic toxicity after 2 dose reductions | Permanently discontinue |
| Severe and life-threatening Skin Toxicity [see Warnings and Precautions (5.3)] | Permanently discontinue |
| Interstitial Pneumonitis [see Warnings and Precautions (5.4)] | Permanently discontinue |
Side Effects of Pemetrexed Disodium
Clinical Trials Experience
Because clinical trials are conducted under widely varying conditions, adverse reactions rates cannot be directly compared to rates in other clinical trials and may not reflect the rates observed in clinical practice. In clinical trials, the most common adverse reactions (incidence ≥20%) of pemetrexed for injection, when administered as a single agent, are fatigue, nausea, and anorexia. The most common adverse reactions (incidence ≥20%) of pemetrexed for injection, when administered in combination with cisplatin are vomiting, neutropenia, anemia, stomatitis/pharyngitis, thrombocytopenia, and constipation.
The most common adverse reactions (incidence ≥20%) of pemetrexed for injection, when administered in combination with pembrolizumab and platinum chemotherapy, are fatigue/asthenia, nausea, constipation, diarrhea, decreased appetite, rash, vomiting, cough, dyspnea, and pyrexia. Non-Squamous NSCLC First-line Treatment of Metastatic Non-squamous NSCLC with Pembrolizumab and Platinum Chemotherapy The safety of pemetrexed for injection, in combination with pembrolizumab and investigator’s choice of platinum (either carboplatin or cisplatin), was investigated in Study KEYNOTE-189, a multicenter, double-blind, randomized (2:1), active-controlled trial in patients with previously untreated, metastatic non-squamous NSCLC with no EGFR or ALK genomic tumor aberrations. A total of 607 patients received pemetrexed for injection, pembrolizumab, and platinum every 3 weeks for 4 cycles followed by pemetrexed for injection and pembrolizumab (n=405), or placebo, pemetrexed for injection, and platinum every 3 weeks for 4 cycles followed by placebo and pemetrexed for injection (n=202).
Patients with autoimmune disease that required systemic therapy within 2 years of treatment; a medical condition that required immunosuppression; or who had received more than 30 Gy of thoracic radiation within the prior 26 weeks were ineligible. The median duration of exposure to pemetrexed for injection was 7.2 months (range: 1 day to 1.7 years). Seventy-two percent of patients received carboplatin.
Pemetrexed for injection was discontinued for adverse reactions in 23% of patients in the pemetrexed for injection, pembrolizumab, and platinum arm. The most common adverse reactions resulting in discontinuation of pemetrexed for injection in this arm were acute kidney injury (3%) and pneumonitis (2%). Adverse reactions leading to interruption of pemetrexed for injection occurred in 49% of patients in the pemetrexed for injection, pembrolizumab, and platinum arm.
Table 2 summarizes the adverse reactions that occurred in ≥20% of patients treated with pemetrexed for injection, pembrolizumab, and platinum Table 2: 5 a Graded per NCI CTCAE version 4.03. b Includes asthenia and fatigue. c Includes genital rash, rash, rash generalized, rash macular, rash maculo-papular, rash papular, rash pruritic, and rash pustular. Table 3 summarizes the laboratory abnormalities that worsened from baseline in at least 20% of patients treated with pemetrexed for injection, pembrolizumab, and platinum. Table 3: Laboratory Abnormalities Worsened from Baseline in ≥ 8 a Each test incidence is based on the number of patients who had both baseline and at least one on-study laboratory measurement available: pemetrexed for injection /pembrolizumab/platinum chemotherapy (range: 381 to 401 patients) and placebo/pemetrexed for injection /platinum chemotherapy (range: 184 to 197 patients). b Graded per NCI CTCAE version 4.03.
Initial Treatment in Combination with Cisplatin The safety of pemetrexed for injection was evaluated in Study JMDB, a randomized (1:1), open-label, multicenter trial conducted in chemotherapy-naive patients with locally advanced or metastatic NSCLC. All patients were fully supplemented with folic acid and vitamin B12. Study JMDB excluded patients with an Eastern Cooperative Oncology Group Performance Status (ECOG PS of 2 or greater), uncontrolled third-space fluid retention, inadequate bone marrow reserve and organ function, or a calculated creatinine clearance less than 45 mL/min.
Patients unable to stop using aspirin or other non-steroidal anti-inflammatory drugs or unable to take folic acid, vitamin B12 or corticosteroids were also excluded from the study. The data described below reflect exposure to pemetrexed for injection plus cisplatin in 839 patients in Study JMDB. Patients received a median of 5 cycles of pemetrexed.
Table 4 provides the frequency and severity of adverse reactions that occurred in ≥5% of 839 patients receiving pemetrexed for injection in combination with cisplatin in Study JMDB. Study JMDB was not designed to demonstrate a statistically significant reduction in adverse reaction rates for pemetrexed for injection, as compared to the control arm, for any specified adverse reaction listed in Table 4. The following additional adverse reactions of pemetrexed were observed.
Incidence 1% to <5% Body as a Whole — febrile neutropenia, infection, pyrexia General Disorders — dehydration Metabolism and Nutrition — increased AST, increased ALT Renal — creatinine clearance decrease, renal failure Eye Disorder — conjunctivitis Incidence < 1% Cardiovascular — arrhythmia General Disorders — chest pain Metabolism and Nutrition — increased GGT Neurology — motor neuropathy Maintenance Treatment Following First-line Non-Pemetrexed for injection Containing Platinum-Based Chemotherapy In Study JMEN, the safety of pemetrexed for injection was evaluated in a randomized (2:1), placebo-controlled, multicenter trial conducted in patients with non-progressive locally advanced or metastatic NSCLC following four cycles of a first-line, platinum-based chemotherapy regimen. Patients received either pemetrexed for injection 500 mg/m 2 or matching placebo intravenously every 21 days until disease progression or unacceptable toxicity. Patients in both study arms were fully supplemented with folic acid and vitamin B 12.
The data described below reflect exposure to pemetrexed for injection in 438 patients in Study JMEN. Approximately half the patients (48%) completed at least six, 21-day cycles and 23% completed ten or more 21-day cycles of pemetrexed for injection. Table 5 provides the frequency and severity of adverse reactions reported in ≥5% of the 438 pemetrexed for injection -treated patients in Study JMEN.
Table 5: Adverse Reactions Occurring in ≥5% of Patients Receiving Pemetrexed for injection in Study JMEN. The following additional adverse reactions were observed in patients who received pemetrexed. Incidence 1% to <5% Dermatology/Skin — alopecia, pruritis/itching Gastrointestinal — constipation General Disorders — edema, fever Hematologic — thrombocytopenia Eye Disorder — ocular surface disease (including conjunctivitis), increased lacrimation Incidence < 1% Cardiovascular — supraventricular arrhythmia Dermatology/Skin — erythema multiforme General Disorders — febrile neutropenia, allergic reaction/hypersensitivity Neurology — motor neuropathy Renal — renal failure Maintenance Treatment Following First-line pemetrexed Plus Platinum Chemotherapy The safety of pemetrexedwas evaluated in PARAMOUNT, a randomized (2:1), placebo-controlled study conducted in patients with non-squamous NSCLC with non-progressive (stable or responding disease) locally advanced or metastatic NSCLC following four cycles of pemetrexedin combination with cisplatin as first-line therapy for NSCLC.
The data described below reflect exposure to pemetrexed in 333 patients in PARAMOUNT. The median number of maintenance cycles was 4 for pemetrexed and placebo arms. Dose reductions for adverse reactions occurred in 3.3% of patients in the pemetrexed arm and 0.6% in the placebo arm.
Dose delays for adverse reactions occurred in 22% of patients in the pemetrexed arm and 16% in the placebo arm. Table 6 provides the frequency and severity of adverse reactions reported in ≥5% of the 333 pemetrexed-treated patients in PARAMOUNT. The following additional Grade 3 or 4 adverse reactions were observed more frequently in the pemetrexed arm.
Incidence 1% to 5% Blood/Bone Marrow — thrombocytopenia General Disorders — febrile neutropenia Incidence Less than 1% Cardiovascular — ventricular tachycardia, syncope General Disorders — pain Gastrointestinal — gastrointestinal obstruction Neurologic — depression Renal — renal failure Vascular — pulmonary embolism Treatment of Recurrent Disease After Prior Chemotherapy The safety of pemetrexed for injection was evaluated in Study JMEI, a randomized (1:1), open-label, active-controlled trial conducted in patients who had progressed following platinum-based chemotherapy. All patients on the pemetrexed for injection arm received folic acid and vitamin B 12 supplementation. Patients unable to discontinue aspirin or other non-steroidal anti-inflammatory drugs or unable to take folic acid, vitamin B 12 orcorticosteroids were also excluded from the study.
The data described below reflect exposure to pemetrexed for injection in 265 patients in Study JMEI. Study JMEI is not designed to demonstrate a statistically significant reduction in adverse reaction rates for pemetrexed, as compared to the control arm, for any specified adverse reaction listed in the Table7 below. Table 7: Adverse Reactions Occurring in ≥5% of Fully Supplemented Patients Receiving Pemetrexed forInjection in Study JMEI.
The following additional adverse reactions were observed in patients assigned to receive pemetrexed. Incidence 1% to <5% Body as a Whole — abdominal pain, allergic reaction/hypersensitivity, febrile neutropenia, infection Dermatology/Skin — erythema multiforme Neurology — motor neuropathy, sensory neuropathy Incidence <1% Cardiovascular — supraventricular arrhythmias Renal — renal failure Mesothelioma The safety of pemetrexed for injection was evaluated in Study JMCH, a randomized (1:1), single-blind study conducted in patients with MPM who had received no prior chemotherapy for MPM. Safety was assessed in 226 patients who received at least one dose of pemetrexed in combination with cisplatin and 222 patients who received at least one dose of cisplatin alone.
Study JMCH excluded patients with Karnofsky Performance Scale (KPS) of less than 70, inadequate bone marrow reserve and organ function, or a calculated creatinine clearance less than 45 mL/min. The data described below reflect exposure to pemetrexed for injection in 168 patients that were fully supplemented with folic acid and vitamin B 12. The median number of treatment cycles administered was 6 in the pemetrexed /cisplatin fully supplemented group and 2 in the pemetrexed/cisplatin never supplemented group.
Patients receiving pemetrexed for injection in the fully supplemented group had a relative dose intensity of 93% of the protocol-specified pemetrexed dose intensity. The most common adverse reaction resulting in dose delay was neutropenia. Table 8 provides the frequency and severity of adverse reactions ≥5% in the subgroup of pemetrexed for injection-treated patients who were fully vitamin supplemented in Study JMCH.
Table 8 provides the ADRs for subgroup of patients treated with pemetrexed for injection in combination with cisplatin (168 patients) or cisplatin alone (163 patients) who received full supplementation with folic acid and vitamin B 12 during study therapy. b NCI CTCAE version 2.0. Table 9: Exploratory Subgroup Analysis of Selected Grade 3/4 Adverse Reactions Occurring in Patients Receiving Pemetrexed for Injection in Combination with Cisplatin with or without Full Vitamin Supplementation in Study JMCH a. Additional Experience Across Clinical Trials Sepsis, with or without neutropenia, including fatal cases: 1% Severe esophagitis, resulting in hospitalization: <1%
Postmarketing Experience
The following adverse reactions have been identified during post-approval use of pemetrexed for 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. These reactions have occurred with pemetrexed for injection when used as a single-agent and in combination therapies.
Blood and Lymphatic System — immune-mediated hemolytic anemia Gastrointestinal — colitis, pancreatitis General Disorders and Administration Site Conditions — edema Injury, poisoning, and procedural complications — Radiation recall has been reported in patients who have previously received radiotherapy. Respiratory — interstitial pneumonitis Skin — Bullous conditions, including Stevens-Johnson syndrome and toxic epidermal necrolysis. Some cases were fatal.
| Pemetrexed for injection Pembrolizumab Platinum Chemotherapy n=405 | Placebo pemetrexed for injection Platinum Chemotherapy n=202 | |||
|---|---|---|---|---|
| Adverse Reaction | All Grades a (%) | Grade 3-4 (%) | All Grades (%) | Grade 3-4 (%) |
| Gastrointestinal Disorders | ||||
| Nausea | 56 | 3.5 | 52 | 3.5 |
| Constipation | 35 | 1.0 | 32 | 0.5 |
| Diarrhea | 31 | 5 | 21 | 3.0 |
| Vomiting | 24 | 3.7 | 23 | 3.0 |
| General Disorders and Administration Site Conditions | ||||
| Fatigueb | 56 | 12 | 58 | 6 |
| Pyrexia | 20 | 0.2 | 15 | 0 |
| Metabolism and Nutrition Disorders | ||||
| Decreased appetite | 28 | 1.5 | 30 | 0.5 |
| Skin and Subcutaneous Tissue Disorders | ||||
| Rashc | 25 | 2.0 | 17 | 2.5 |
| Respiratory, Thoracic and Mediastinal Disorders | ||||
| Cough | 21 | 0 | 28 | 0 |
| Dyspnea | 21 | 3.7 | 26 | 5 |
| Pemetrexed for Injection Pembrolizumab Platinum Chemotherapy | Placebo Pemetrexed for Injection Platinum Chemotherapy | |||
|---|---|---|---|---|
| Laboratory Testa | All Gradesb % | Grades 3-4 % | All Grades % | Grades 3-4 % |
| Chemistry | ||||
| Hyperglycemia | 63 | 9 | 60 | 7 |
| Increased ALT | 47 | 3.8 | 42 | 2.6 |
| Increased AST | 47 | 2.8 | 40 | 1.0 |
| Hypoalbuminemia | 39 | 2.8 | 39 | 1.1 |
| Increased creatinine | 37 | 4.2 | 25 | 1.0 |
| Hyponatremia | 32 | 7 | 23 | 6 |
| Hypophosphatemia | 30 | 10 | 28 | 14 |
| Increased alkaline phosphatase | 26 | 1.8 | 29 | 2.1 |
| Hypocalcemia | 24 | 2.8 | 17 | 0.5 |
| Hyperkalemia | 24 | 2.8 | 19 | 3.1 |
| Hypokalemia | 21 | 5 | 20 | 5 |
| Hematology | ||||
| Anemia | 85 | 17 | 81 | 18 |
| Lymphopenia | 64 | 22 | 64 | 25 |
| Neutropenia | 48 | 20 | 41 | 19 |
| Thrombocytopenia | 30 | 12 | 29 | 8 |
| Adverse Reaction b | Pemetrexed for Injection /cisplatin (N=168) | Cisplatin (N=163) | ||
|---|---|---|---|---|
| All Grades (%) | Grade 3-4 (%) | All Grades (%) | Grade 3-4 (%) | |
| Laboratory | ||||
| Hematologic | ||||
| Neutropenia | 56 | 23 | 13 | 3 |
| Anemia | 26 | 4 | 10 | 0 |
| Thrombocytopenia | 23 | 5 | 9 | 0 |
| Renal | ||||
| Elevated creatinine | 11 | 1 | 10 | 1 |
| Decreased creatinine clearance | 16 | 1 | 18 | 2 |
| Clinical | ||||
| Eye Disorder | ||||
| Conjunctivitis | 5 | 0 | 1 | 0 |
| Gastrointestinal | ||||
| Nausea | 82 | 12 | 77 | 6 |
| Vomiting | 57 | 11 | 50 | 4 |
| Stomatitis/pharyngitis | 23 | 3 | 6 | 0 |
| Anorexia | 20 | 1 | 14 | 1 |
| Diarrhea | 17 | 4 | 8 | 0 |
| Constipation | 12 | 1 | 7 | 1 |
| Dyspepsia | 5 | 1 | 1 | 0 |
| Constitutional Symptoms | ||||
| Fatigue | 48 | 10 | 42 | 9 |
| Metabolism and Nutrition | ||||
| Dehydration | 7 | 4 | 1 | 1 |
| Neurology | ||||
| Sensory neuropathy | 10 | 0 | 10 | 1 |
| Taste disturbance | 8 | 0 | 6 | 0 |
| Dermatology/Skin | ||||
| Rash | 16 | 1 | 5 | 0 |
| Alopecia | 11 | 0 | 6 | 0 |
| Grade 3 to 4 Adverse Reactions | Fully Supplemented Patients N=168 (%) | Never Supplemented Patients N=32 (%) |
|---|---|---|
| Neutropenia | 23 | 38 |
| Thrombocytopenia | 5 | 9 |
| Vomiting | 11 | 31 |
| Febrile neutropenia | 1 | 9 |
| Infection with Grade 3/4 neutropenia | 0 | 6 |
| Diarrhea | 4 | 9 |
Warnings & Cautions for Pemetrexed Disodium
Myelosuppression and Increased Risk of Myelosuppression without Vitamin Supplementation Pemetrexed forinjection can cause severe myelosuppression resulting in a requirement for transfusions and which may lead to neutropenic infection. The risk of myelosuppression is increased in patients who do not receive vitamin supplementation. Initiate supplementation with oral folic acid and intramuscular vitamin B 12 prior to the first dose of pemetrexed; continue vitamin supplementation during treatment and for 21 days after the last dose of pemetrexed to reduce the severity of hematologic and gastrointestinal toxicity of pemetrexed for injection.
Obtain a complete blood count at the beginning of each cycle. In Study JMCH, 18% of patients in the pemetrexed for injection arm required red blood cell transfusions compared to 7% of patients in the cisplatin arm. The incidences of renal failure in clinical studies in which patients received pemetrexed with cisplatin were: 2.1% in Study JMDB and 2.2% in Study JMCH.
The incidence of renal failure in clinical studies in which patients received pemetrexed for injection as a single agent ranged from 0.4% to 0.6% Studies JMEN, PARAMOUNT, and JMEI. Determine creatinine clearance before each dose and periodically monitor renal function during treatment with pemetrexed for injection. Withhold pemetrexed for injection in patients with a creatinine clearance of less than 45 mL/minute.
Bullous and Exfoliative Skin Toxicity Serious and sometimes fatal, bullous, blistering and exfoliative skin toxicity, including cases suggestive of Stevens-Johnson Syndrome/Toxic epidermal necrolysis can occur with pemetrexed for injection. Permanently discontinue pemetrexed for severe and life-threatening bullous, blistering or exfoliating skin toxicity.
Interstitial Pneumonitis
Serious interstitial pneumonitis, including fatal cases, can occur with pemetrexed for injection treatment. Withhold pemetrexed for acute onset of new or progressive unexplained pulmonary symptoms such as dyspnea, cough, or fever pending diagnostic evaluation. If pneumonitis is confirmed, permanently discontinue pemetrexed.
Radiation Recall
Radiation recall can occur with pemetrexed for injection in patients who have received radiation weeks to years previously. Monitor patients for inflammation or blistering in areas of previous radiation treatment. Permanently discontinue pemetrexed for injection for signs of radiation recall.
Increased Risk of Toxicity with Ibuprofen in Patients with Renal Impairment Exposure to pemetrexed is increased in patients with mild to moderate renal impairment who take concomitant ibuprofen, increasing the risks of adverse reactions of pemetrexed. If concomitant ibuprofen use cannot be avoided, monitor patients more frequently for pemetrexed adverse reactions, including myelosuppression, renal, and gastrointestinal toxicity.
Embryo-Fetal Toxicity Based on findings from animal studies and its mechanism of action, pemetrexed can cause fetal harm when administered to a pregnant woman. In animal reproduction studies, intravenous administration of pemetrexed to pregnant mice during the period of organogenesis was teratogenic, resulting in developmental delays and increased malformations at doses lower than the recommended human dose of 500 mg/m 2. Advise pregnant women of the potential risk to a fetus.
Advise females of reproductive potential to use effective contraception during treatment with pemetrexed and for 6 months after the last dose.
Drug Interactions with Pemetrexed Disodium
Effects of Ibuprofen on Pemetrexed Ibuprofen increases exposure (AUC) of pemetrexed. Monitor patients more frequently for myelosuppression, renal, and gastrointestinal toxicity, if concomitant administration of ibuprofen cannot be avoided. Ibuprofen increased risk of pemetrexed for injection toxicity in patients with mild to moderate renal impairment.
Modify the ibuprofen dosage as recommended for patients with a creatinine clearance between 45 mL/min and 79 mL/min.
Pregnancy Safety for Pemetrexed Disodium
Pregnancy Risk Summary Based on findings from animal studies and its mechanism of action, pemetrexed for injection can cause fetal harm when administered to a pregnant woman. There are no available data on pemetrexed for injection use in pregnant women. In animal reproduction studies, intravenous administration of pemetrexed to pregnant mice during the period of organogenesis was teratogenic, resulting in developmental delays and malformations at doses lower than the recommended human dose of 500 mg/m 2.
Advise pregnant women of the potential risk to a fetus. In the U.S. general population, the estimated background risk of major birth defects and miscarriage in clinically recognized pregnancies is respectively. Data Animal DataPemetrexed was teratogenic in mice.
Daily dosing of pemetrexed by intravenous injection to pregnant mice during the period of organogenesis increased the incidence of fetal malformations (cleft palate; protruding tongue; enlarged or misshaped kidney; and fused lumbar vertebra) at doses (based on BSA) 0.03 times the human dose of 500 mg/m 2. At doses, based on BSA, greater than or equal to 0.0012 times the 500 mg/m 2 human dose, pemetrexed administration resulted in dose-dependent increases in developmental delays (incomplete ossification of talus and skull bone; and decreased fetal weight).
Pediatric Use of Pemetrexed Disodium
Pediatric Use The safety and effectiveness of pemetrexed for injection in pediatric patients have not been established. The safety and pharmacokinetics of pemetrexed for injection were evaluated in two clinical studies conducted in pediatric patients with recurrent solid tumors (NCT00070473 N=32 and NCT00520936 N=72). Patients in both studies received concomitant vitamin B 12 and folic acid supplementation and dexamethasone.
No tumor responses were observed. Adverse reactions observed in pediatric patients were similar to those observed in adults. Single-dose pharmacokinetics of pemetrexed for injection were evaluated in 22 patients age 4 to 18 years enrolled in NCT00070473 were within range of values in adults.
Contraindications for Pemetrexed Disodium
Pemetrexed for injection is contraindicated in patients with a history of severe hypersensitivity reaction to pemetrexed. History of severe hypersensitivity reaction to pemetrexed.
Overdosage Information for Pemetrexed Disodium
No drugs are approved for the treatment of pemetrexed for injection overdose. Based on animal studies, administration of leucovorin may mitigate the toxicities of pemetrexed overdosage. It is not known whether pemetrexed is dialyzable.
Clinical Studies of Pemetrexed Disodium
Non-Squamous NSCLC Initial Treatment in Combination with Pembrolizumab and Platinum The efficacy of pemetrexed for injection in combination with pembrolizumab and platinum chemotherapy was investigated in Study KEYNOTE-189 (NCT02578680), a randomized, multicenter, double-blind, active-controlled trial conducted in patients with metastatic non-squamous NSCLC, regardless of PD-L1 tumor expression status, who had not previously received systemic therapy for metastatic disease and in whom there were no EGFR or ALK genomic tumor aberrations. Patients with autoimmune disease that required systemic therapy within 2 years of treatment; a medical condition that required immunosuppression; or who had received more than 30 Gy of thoracic radiation within the prior 26 weeks were ineligible. Randomization was stratified by smoking status (never versus former/current), choice of platinum (cisplatin versus carboplatin), and tumor PD-L1 status (TPS <1% versus TPS ≥1%).
Patients randomized to placebo,pemetrexed for injection,and platinum chemotherapy were offered pembrolizumab as a single agent at the time of disease progression.Assessment of tumor status was performed at Week 6, Week 12, and then every 9 weeks thereafter. The main efficacy outcome measures were OS and PFS as assessed by BICR RECIST v1.1, modified to follow a maximum of 10 target lesions and a maximum of five target lesions per organ. Additional efficacy outcome measures were ORR and duration of response, as assessed by the BICR according to RECIST v1.1, modified to follow a maximum of 10 target lesions and a maximum of 5 target lesions per organ.A total of 616 patients were randomized: 410 patients to the pemetrexed for injection, pembrolizumab, and platinum chemotherapy arm and 206 to the placebo, pemetrexed for injection, and platinum chemotherapy arm.
Thirty-one percent had tumor PD-L1 expression TPS <1%. Seventy-two percent received carboplatin and 12% were never smokers. A total of 85 patients in the placebo, pemetrexed for injection, and chemotherapy arm received an anti-PD-1/PD-L1 monoclonal antibody at the time of disease progression.The trial demonstrated a statistically significant improvement in OS and PFS for patients randomized to pemetrexed in combination with pembrolizumab and platinum chemotherapy compared with placebo, pemetrexed or injection, and platinum chemotherapy (see Table 10 and Figure 1).
Table 10: Efficacy Results of KEYNOTE-189 a Based on the stratified Cox proportional hazard model. b Based on stratified log-rank test. c Response: Best objective response as confirmed complete response or partial response. d Based on Miettinen and Nurminen method stratified by PD-L1 status, platinum chemotherapy and smoking status. A+P+C = pemetrexed + pembrolizumab + platinum chemotherapy.A+C = pemetrexed + platinum chemotherapy + placebo. Figure1: Kaplan-Meier Curve for Overall Survival in KEYNOTE-189 *Based on the protocol-specified final OS analysis Initial Treatment in Combination with Cisplatin The efficacy of pemetrexed for injection was evaluated in Study JMDB (NCT00087711), a multi-center, randomized (1:1), open-label study conducted in 1725 chemotherapy-naive patients with Stage IIIb/IV NSCLC.
Patients were randomized to receive pemetrexedfor injection with cisplatin or gemcitabine with cisplatin. Randomization was stratified by Eastern Cooperative Oncology Group Performance Status (ECOG PS 0 versus 1), gender, disease stage, basis for pathological diagnosis (histopathological /cytopathological), history of brain metastases, and investigative center. Treatment was administered up to a total of 6 cycles; patients in both arms received folic acid, vitamin B 12, and dexamethasone.
The primary efficacy outcome measure was overall survival. A total of 1725 patients were enrolled with 862 patients randomized to pemetrexed for injection in combination with cisplatin and 863 patients to gemcitabine in combination with cisplatin. For tumor characteristics, 73% had non-squamous NSCLC and 27% had squamous NSCLC; 76% had Stage IV disease.
Efficacy results in Study JMDB are presented in Table 11 and Figure 2. Table 11: Efficacy Results in Study JMDB a Unadjusted for multiple comparisons. b Adjusted for gender, stage, basis of diagnosis, and performance status. Figure 2: Kaplan-Meier Curves for Overall Survival in Study JMDB In pre-specified analyses assessing the impact of NSCLC histology on overall survival, clinically relevant differences in survival according to histology were observed.
These subgroup analyses are shown in Table 12 and Figures 3 and 4. This difference in treatment effect for pemetrexed for injection based on histology demonstrating a lack of efficacy in squamous cell histology was also observed in Studies JMEN and JMEI. Table 12: a Unadjusted for multiple comparisons. b Adjusted for ECOG PS, gender, disease stage, and basis for pathological diagnosis (histopathological/cytopathological).
Figure 3: Kaplan-Meier Curves for Overall Survival in Non-squamous NSCLC in Study JMDB Figure 4: Kaplan-Meier Curves for Overall Survival in Squamous NSCLC in Study JMDB Maintenance Treatment Following First-line Non-Pemetrexedfor injection Containing Platinum-Based Chemotherapy The efficacy of pemetrexed as maintenance therapy following first-line platinum-based chemotherapy was evaluated in Study JMEN (NCT00102804), a multicenter, randomized (2:1), double-blind, placebo-controlled study conducted in 663 patients with Stage IIIb/IV NSCLC who did not progress after four cycles of platinum-based chemotherapy. Patients were randomized to receive pemetrexed 500 mg/m 2 intravenously every 21 days or placebo until disease progression or intolerable toxicity. Randomization was carried out using a minimization approach using the following factors: gender, ECOG PS (0 versus 1), response to prior chemotherapy (complete or partial response versus stable disease), history of brain metastases (yes versus no), non-platinum component of induction therapy (docetaxel versus gemcitabine versus paclitaxel), and disease stage (IIIb versus IV).
The major efficacy outcome measures were progression-free survival based on assessment by independent review and overall survival; both were measured from the date of randomization in Study JMEN. A total of 663 patients were enrolled with 441 patients randomized to pemetrexed for injectionand 222 patients randomized to placebo. With regard to tumor characteristics, 81% had Stage IV disease, 73% had non-squamous NSCLC and 27% had squamous NSCLC.
Efficacy results are presented in Table 13 and Figure 5. Table 13: Efficacy Results in Study JMEN a Hazard ratios are adjusted for multiplicity but not for stratification variables. Table 14: Efficacy Results in Study JMEN by Histologic Subgroup a Hazard ratios are not adjusted for multiplicity. b Primary diagnosis of NSCLC not specified as adenocarcinoma, large cell carcinoma, or squamous cell carcinoma.
Figure 6: Kaplan-Meier Curves for Overall Survival in Non-squamous NSCLC in Study JMEN Figure 7: Kaplan-Meier Curves for Overall Survival in Squamous NSCLC in Study JMEN Maintenance Treatment Following First-line Pemetrexedfor injection Plus Platinum Chemotherapy The efficacy of pemetrexed as maintenance therapy following first-line platinum-based chemotherapy was also evaluated in PARAMOUNT (NCT00789373), a multi-center, randomized (2:1), double-blind, placebo-controlled study conducted in patients with Stage IIIb/IV non-squamous NSCLC who had completed four cycles of pemetrexed in combination with cisplatin and achieved a complete response (CR) or partial response (PR) or stable disease (SD). Patients were required to have an ECOG PS of 0 or 1. Randomization was stratified by response to pemetrexedfor injection in combination with cisplatin induction therapy (CR or PR versus SD), disease stage (IIIb versus IV), and ECOG PS (0 versus 1).
The main efficacy outcome measure was investigator-assessed progression-free survival (PFS) and an additional efficacy outcome measure was overall survival (OS); PFS and OS were measured from the time of randomization. A total of 539 patients were enrolled with 359 patients randomized to pemetrexedfor injection and 180 patients randomized to placebo. Efficacy results for PARAMOUNT are presented in Table 15 and Figure 8.
Table 15: Efficacy Results in PARAMOUNT a Hazard ratios are adjusted for multiplicity but not for stratification variables. b Based on investigator’s assessment. Figure 8: Kaplan-Meier Curves for Overall Survival in PARAMOUNT Treatment of Recurrent Disease After Prior Chemotherapy The efficacy of pemetrexed for injectionwas evaluated in Study JMEI (NCT00004881), a multicenter, randomized (1:1), open-label study conducted in patients with Stage III or IV NSCLC that had recurred or progressed following one prior chemotherapy regimen for advanced disease. Patients randomized to pemetrexedfor injection also received folic acid and vitamin B 12.
The study was designed to show that overall survival with pemetrexedfor injection was non-inferior to docetaxel, as the major efficacy outcome measure, and that overall survival was superior for patients randomized to pemetrexed compared to docetaxel, as a secondary outcome measure. A total of 571 patients were enrolled with 283 patients randomized to pemetrexedfor injection and 288 patients randomized to docetaxel. The efficacy results in the overall population and in subgroup analyses based on histologic subtype are provided in Tables 16 and 17, respectively.
Study JMEI did not show an improvement in overall survival in the intent-to-treat population. In subgroup analyses, there was no evidence of a treatment effect on survival in patients with squamous NSCLC; the absence of a treatment effect in patients with NSCLC of squamous histology was also observed Studies JMDB and JMEN. Table 16: Efficacy Results in Study JMEI a Hazard ratios are not adjusted for multiplicity or for stratification variables.
Table 17: Exploratory Efficacy Analyses by Histologic Subgroup in Study JMEI a Hazard ratio unadjusted for multiple comparisons. b Primary diagnosis of NSCLC not specified as adenocarcinoma, large cell carcinoma, or squamous cell carcinoma.
Mesothelioma
The efficacy of pemetrexedfor injection was evaluated in Study JMCH (NCT00005636), a multicenter, randomized (1:1), single-blind study conducted in patients with MPM who had received no prior chemotherapy. Randomization was stratified by multiple baseline variables including KPS, histologic subtype (epithelial, mixed, sarcomatoid, other), and gender. The major efficacy outcome measure was overall survival and additional efficacy outcome measures were time to disease progression, overall response rate, and response duration.
A total of 448 patients received at least one dose of protocol-specified therapy; 226 patients were randomized to and received at least one dose of pemetrexed plus cisplatin, and 222 patients were randomized to and received cisplatin. The baseline demographics and tumor characteristics of the subgroup of fully supplemented patients was similar to the overall study population. The efficacy results from Study JMCH are summarized in Table 18 and Figure 9.
Table 18: Efficacy Results in Study JMCH a Hazard ratios are not adjusted for stratification variables b Not a pre-specified analysis. Figure 9: Kaplan-Meier Curves for Overall Survival in Study JMCH Based upon prospectively defined criteria (modified Southwest Oncology Group methodology) the objective tumor response rate for pemetrexedfor injection plus cisplatin was greater than the objective tumor response rate for cisplatin alone. There was also improvement in lung function (forced vital capacity) in the pemetrexedfor injection plus cisplatin arm compared to the control arm.
| Endpoint | Pemetrexed for Injection Pembrolizumab Platinum Chemotherapy n=410 | Placebo Pemetrexed for Injection Platinum Chemotherapy n=206 |
|---|---|---|
| OS | ||
| Number (%) of patients with event | 127 (31%) | 108 (52%) |
| Median in months (95% CI) | NR (NR, NR) | 11.3 (8.7, 15.1) |
| Hazard ratioa (95% CI) | 0.49 (0.38, 0.64) | |
| p-valueb | <0.0001 | |
| PFS | ||
| Number of patients with event (%) | 244 (60%) | 166 (81%) |
| Median in months (95% CI) | 8.8 (7.6, 9.2) | 4.9 (4.7, 5.5) |
| Hazard ratioa (95% CI) | 0.52 (0.43, 0.64) | |
| p-valueb | <0.0001 | |
| ORR | ||
| Overall response ratec (95% CI) | 48% (43, 53) | 19% (14, 25) |
| Complete response | 0.5% | 0.5% |
| Partial response | 47% | 18% |
| p-valued | <0.0001 | |
| Duration of Response | ||
| Median in months (range) | 11.2 (1.1+, 18.0+) | 7.8 (2.1+, 16.4+) |
| Efficacy Parameter | Pemetrexed for injection plus Cisplatin (N=862) | Gemcitabine plus Cisplatin (N=863) |
|---|---|---|
| Overall Survival | ||
| Median (months) (95% CI) | 10.3 (9.8 - 11.2) | 10.3 (9.6 to 10.9) |
| Hazard ratio (HR)a,b (95% CI) | 0.94 (0.84 - 1.05) | |
| Progression-Free Survival | ||
| Median (months) (95% CI) | 4.8 (4.6 - 5.3) | 5.1 (4.6- 5.5) |
| Hazard ratio (HR)a,b (95% CI) | 1.04 (0.94 to 1.15) | |
| Overall Response Rate (95% CI) | 27.1% (24.2 - 30.1) | 24.7% (21.8 - 27.6) |
| Histologic Subgroups | Pemetrexed plus Cisplatin (N=862) | Gemcitabine plus Cisplatin (N=863) |
|---|---|---|
| Non-squamous NSCLC (N=1252) | ||
| Median (months) (95% CI) | 11.0 (10.1- 12.5) | 10.1 (9.3 -10.9) |
| HR a,b (95% CI) | 0.84 (0.74 -0.96) | |
| Adenocarcinoma (N=847) | ||
| Median (months) (95% CI) | 12.6 (10.7 - 13.6) | 10.9 (10.2 - 11.9) |
| HRa, b (95% CI) | 0.84 (0.71 - 0.99) | |
| Large Cell (N=153) | ||
| Median (months) (95% CI) | 10.4 (8.6 - 14.1) | 6.7 (5.5 -9.0) |
| HR a,b (95% CI) | 0.67 (0.48 -0.96) | |
| Non-squamous, not otherwise specified (N=252) | ||
| Median (months) (95% CI) | 8.6 (6.8 -10.2) | 9.2 (8.1- 10.6) |
| HR a,b (95% CI) | 1.08 (0.81 -1.45) | |
| Squamous Cell c (N=473) | ||
| Median (months) (95% CI) | 9.4 (8.4 - 10.2) | 10.8 (9.5 -12.1) |
| HR a,b (95% CI) | 1.23 (1.00 -1.51) | |
| Efficacy Parameter | Pemetrexed for Injection | Placebo |
|---|---|---|
| Overall survival | N=441 | N=222 |
| Median (months) (95% CI) | 13.4 (11.9- 15.9) | 10.6 (8.7-12.0) |
| Hazard ratio a (95% CI) | 0.79 (0.65- 0.95) | |
| p-value | p=0.012 | |
| Progression-free survival per independent review | N=387 | N=194 |
| Median (months) (95% CI) | 4.0 (3.1-4.4) | 2.0 (1.5-2.8) |
| Hazard ratio a (95% CI) | 0.60 (0.49-0.73) | |
| p-value | p<0.00001 |
| Efficacy Parameter | Overall Survival | Progression-Free Survival Per Independent Review | ||
|---|---|---|---|---|
| Pemetrexed for Injection | Placebo (N=222) | Pemetrexed for Injection | Placebo (N=194) | |
| Non-squamous NSCLC (n=481) | ||||
| Median (months) | 15.5 | 10.3 | 4.4 | 1.8 |
| HR a (95% CI) | 0.70 (0.56 - 0.88) | 0.47 (0.37 - 0.60) | ||
| Adenocarcinoma (n=328) | ||||
| Median (months | 16.8 | 11.5 | 4.6 | 2.7 |
| HR a (95% CI) | 0.73 (0.56 - 0.96) | 0.51 (0.38 - 0.68) | ||
| Large cell carcinoma (n=20) | ||||
| Median (months) | 8.4 | 7.9 | 4.5 | 1.5 |
| HR a (95% CI) | 0.98 (0.36- 2.65) | 0.40 (0.12 -1.29) | ||
| Otherb (n=133) | ||||
| Median (months) | 11.3 | 7.7 | 4.1 | 1.6 |
| HR a (95% CI) | 0.61 (0.40 -0.94) | 0.44 (0.28 -0.68) | ||
| Squamous cell NSCLC (n=182) | ||||
| Median (months) | 9.9 | 10.8 | 2.4 | 2.5 |
| HR a (95% CI) | 1.07 (0.77- 1.50) | 1.03 (0.71- 1.49) | ||
| Efficacy Parameter | Pemetrexed for Injection | Placebo (N=180) |
|---|---|---|
| Overall survival | ||
| Median (months) (95% CI) | 13.9 (12.8 - 16.0) | 11.0 (10.0 - 12.5) |
| Hazard ratio (HR) a (95% CI) | 0.78 (0.64 - 0.96) | |
| p-value | p=0.02 | |
| Progression-free survival b | ||
| Median (months) (95% CI) | 4.1 (3.2 - 4.6) | 2.8 (2.6 - 3.1) |
| Hazard ratio (HR) a (95% CI) | 0.62 (0.49 -0.79) | |
| p-value | p<0.0001 | |
| Efficacy Parameter | Pemetrexed for Injection (N=283) | Docetaxel (N=288) |
|---|---|---|
| Overall survival | ||
| Median (months) (95% CI) | 8.3 (7.0- 9.4) | 7.9 (6.3 - 9.2) |
| Hazard ratio a (95% CI) | 0.99 (0.82 to 1.20) | |
| Progression-free survival | ||
| Median (months) (95% CI) | 2.9 (2.4-3.1) | 2.9 (2.7 -3.4) |
| Hazard ratio a (95% CI) | 0.97 (0.82-1.16) | |
| Overall response rate (95% CI) | 8.5% (5.2 -11.7) | 8.3% (5.1- 11.5) |
| Histologic Subgroups | Pemetrexed for Injection | Docetaxel (N=288) |
|---|---|---|
| Non-squamous NSCLC (N=399) | ||
| Median (months) (95% CI) | 9.3 (7.8 -9.7) | 8.0 (6.3 - 9.3) |
| HR a (95% CI) | 0.89 (0.71- 1.13) | |
| Adenocarcinoma (N=301) | ||
| Median (months) (95% CI) | 9.0 (7.6- 9.6) | 9.2 (7.5 -11.3) |
| HR a (95% CI) | 1.09 (0.83 -1.44) | |
| Large Cell (N=47) | ||
| Median (months) (95% CI) | 12.8 (5.8 - 14.0) | 4.5 (2.3- 9.1) |
| HR a (95% CI) | 0.38 (0.18- 0.78) | |
| Other b (N=51) | ||
| Median (months) (95% CI) | 9.4 (6.0 - 10.1) | 7.9 (4.0 - 8.9) |
| HR a (95% CI) | 0.62 (0.32 - 1.23) | |
| Squamous NSCLC (N=172) | ||
| Median (months) (95% CI) | 6.2 (4.9 - 8.0) | 7.4 (5.6 - 9.5) |
| HR a (95% CI) | 1.32 (0.93 - 1.86) | |
| Efficacy Parameter | All Randomized and Treated Patients (N=448) | Fully Supplemented Patients (N=331) | ||
|---|---|---|---|---|
| Pemetrexed for Injection /Cisplatin (N=226) | Cisplatin (N=222) | pemetrexed for Injection /Cisplatin (N=168) | Cisplatin (N=163) | |
| Median overall survival (months) | 12.1 | 9.3 | 13.3 | 10.0 |
| (95% CI) | (10.0 to 14.4) | (7.8 to 10.7) | (11.4 to 14.9) | (8.4 to11.9) |
| Hazard ratio a | 0.77 | 0.75 | ||
| Log rank p-value | 0.020 | NA b | ||
Drug information sourced from the FDA. This content is for informational purposes only and does not constitute medical advice. Consult a healthcare professional before making any medication decisions.
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