Consumer medicine information

DBL Pemetrexed (as disodium) powder for injection

Pemetrexed

BRAND INFORMATION

Brand name

DBL Pemetrexed Powder for infusion

Active ingredient

Pemetrexed

Schedule

S4

 

Consumer medicine information (CMI) leaflet

Please read this leaflet carefully before you start using DBL Pemetrexed (as disodium) powder for injection.

What is in this leaflet

This leaflet answers some common questions about DBL™ Pemetrexed (as disodium) powder for injection.

It does not contain all the available information.

It does not take the place of talking to your doctor or pharmacist.

All medicines have risks and benefits. Your doctor has weighed the risks of you taking DBL™ Pemetrexed (as disodium) powder for injection against the benefits they expect it will have for you.

If you have any concerns about taking this medicine, ask your doctor or pharmacist.

Keep this leaflet with the medicine.

You may need to read it again.

What DBL™ Pemetrexed (as disodium) powder for injection is used for

DBL™ Pemetrexed (as disodium) powder for injection is used to treat:

  • malignant pleural mesothelioma, a rare cancer of the lungs often related to exposure to asbestos
  • non small cell lung cancer, a type of lung cancer

This medicine belongs to a group of medicines called antineoplastic or cytotoxic medicines. You may also hear of these being called chemotherapy medicines.

DBL™ Pemetrexed (as disodium) powder for injection affects enzymes within cancer cells, killing cancer cells or stopping them from growing and multiplying.

This medicine may be used in combination with other medicines used to treat cancer.

Your doctor may have prescribed this medicine for another reason. Ask your doctor if you have any questions about why DBL™ Pemetrexed (as disodium) powder for injection has been prescribed for you.

This medicine is available only with a doctor’s prescription.

DBL™ Pemetrexed (as disodium) powder for injection is not recommended for use in children under the age of 18, as there is not enough information on its effects in children in this age group.

Before you are given DBL™ Pemetrexed (as disodium) powder for injection

When you must not be given it

Do not take DBL™ Pemetrexed (as disodium) powder for injection if you have an allergy to:

  • any medicine containing pemetrexed disodium hemipentahydrate
  • any of the ingredients listed at the end of this leaflet.

Some of the symptoms of an allergic reaction may include shortness of breath, wheezing or difficulty breathing; swelling of the face, lips, tongue or other parts of the body; rash, itching, or hives on the skin.

If you are not sure whether you should be given this medicine, talk to your doctor.

Before you are given it

Tell your doctor or pharmacist if you have allergies to any other medicines, foods, preservatives or dyes.

Tell your doctor if you have or have had any of the following medical conditions:

  • liver problems
  • kidney problems
  • heart problems
  • blood disorder with a reduced number of red cells, white blood cells or platelets
  • diabetes
  • high blood pressure

Tell your doctor if you are pregnant or intend to become pregnant.

Your doctor will discuss the possible risks and benefits of using DBL™ Pemetrexed (as disodium) powder for injection during pregnancy.

Tell your doctor if you are breast-feeding or plan to breast-feed.

It is recommended that you do not breast-feed while taking DBL™ Pemetrexed (as disodium) powder for injection, as it may pass into breast milk and therefore there is a possibility that the breast-fed baby may be affected.

If you have not told your doctor about any of the above, tell them before you start taking DBL™ Pemetrexed (as disodium) powder for injection.

Your doctor should advise you to take certain medicines or vitamins while taking DBL™ Pemetrexed (as disodium) powder for injection.

Your doctor should advise you to take a folate supplement or a multivitamin containing folate once daily for at least five days in the week before your first DBL™ Pemetrexed (as disodium) powder for injection dose. This should be continued throughout your therapy cycles and for at least three weeks following completion of DBL™ Pemetrexed (as disodium) powder for injection treatment.

Your doctor should also advise you to have a vitamin B12 injection during the week before your first dose of DBL™ Pemetrexed (as disodium) powder for injection. A vitamin B12 injection should be given once every three treatment cycles.

Your doctor may also advise you to take an oral corticosteroid such as dexamethasone to reduce the likelihood and severity of skin rashes.

Ask your doctor if you have any questions about why these other medicines have been prescribed for you.

Taking other medicines

Tell your doctor or pharmacist if you are taking any other medicines, including any that you buy without a prescription from your pharmacy, supermarket or health food shop.

Some medicines and DBL™ Pemetrexed (as disodium) powder for injection may interfere with each other. These include:

  • medicines used to treat arthritis or pain from inflammation such as ibuprofen or other non-steroidal anti-inflammatory medicines (NSAIDs).
  • some vaccines (ask your doctor)

These medicines may be affected by DBL™ Pemetrexed (as disodium) powder for injection, or may affect how well it works. You may need different amounts of your medicine, or you may need to take different medicines. Your doctor or pharmacist will advise you.

Your doctor and pharmacist may have more information on medicines to be careful with or avoid while taking DBL™ Pemetrexed (as disodium) powder for injection.

How DBL™ Pemetrexed (as disodium) powder for injection is given

How much is given

Your doctor will decide what dose you will receive. This depends on your condition and other factors, such as your weight, kidney function and other chemotherapy medicines you are being given.

DBL™ Pemetrexed (as disodium) powder for injection may be given alone or in combination with other drugs.

Several courses of DBL™ Pemetrexed (as disodium) powder for injection therapy may be needed depending on your response to treatment.

Ask your doctor if you want to know more about the dose of DBL™ Pemetrexed (as disodium) powder for injection you receive.

How it is given

DBL™ Pemetrexed (as disodium) powder for injection is given as a slow injection into a vein. DBL™ Pemetrexed (as disodium) powder for injection must only be given by a doctor or nurse.

DBL™ Pemetrexed (as disodium) powder for injection is given as an infusion (drip) into your veins, over 10 minutes.

How long it is given

DBL™ Pemetrexed (as disodium) powder for injection is usually given once every three weeks. This is called one cycle of chemotherapy. Your doctor will decide how many of these cycles you will need. Before each infusion you will have samples of your blood taken to check that you have enough blood cells to receive DBL™ Pemetrexed (as disodium) powder for injection. Your doctor may decide to change your dose or delay treating you depending on your general condition and if your blood cell counts are too low.

Overdose

As DBL™ Pemetrexed (as disodium) powder for injection is given to you under the supervision of your doctor, it is very unlikely that you will receive too much. However, if you experience any side effects after being given DBL™ Pemetrexed (as disodium) powder for injection, tell your doctor immediately or go to Accident and Emergency at your nearest hospital.

You may need urgent medical attention.

Symptoms of a DBL™ Pemetrexed (as disodium) powder for injection overdose include the side effects listed below in the ‘Side Effects’ section, but are usually of a more severe nature.

Ask your doctor or pharmacist if you have any concerns.

While you are using DBL™ Pemetrexed (as disodium) powder for injection

Things you must do

Always take your daily folate supplement until your doctor tells you to stop.

Always check with your doctor that your Vitamin B12 injections are up to date.

Be sure to keep all your doctor’s appointments so your progress can be checked.

Your doctor may want to check your blood pressure and do some blood and other tests from time to time to check on your progress and detect any unwanted side effects.

Tell any other doctors, dentists, and pharmacists who are treating you that you are taking DBL™ Pemetrexed (as disodium) powder for injection.

If you are about to be started on any new medicine, tell your doctor, dentist or pharmacist that you are taking DBL™ Pemetrexed (as disodium) powder for injection.

If you plan to have surgery that needs a general anaesthetic, tell your doctor or dentist that you are having DBL™ Pemetrexed (as disodium) powder for injection.

If you become pregnant while taking DBL™ Pemetrexed (as disodium) powder for injection, tell your doctor.

DBL™ Pemetrexed (as disodium) powder for injection can lower the number of white blood cells and platelets in your blood. This means that you have an increased chance of getting an infection or bleeding. The following precautions should be taken to reduce your risk of infection or bleeding:

  • Avoid people who have infections. Check with your doctor immediately if you think you may be getting an infection, or if you get a fever, chills, cough, hoarse throat, lower back or side pain or find it painful or difficult to urinate.
  • Be careful when using a toothbrush, toothpick or dental floss. Your doctor, dentist, nurse or pharmacist may recommend other ways to clean your teeth and gums. Check with your doctor before having any dental work.
  • Be careful not to cut yourself when you are using sharp objects such as a razor or nail cutters.
  • Avoid contact sports or other situations where you may bruise or get injured.

Things to be careful of

Be careful driving or operating machinery until you know how DBL™ Pemetrexed (as disodium) powder for injection affects you.

This medicine may cause tiredness or drowsiness in some people. Make sure you know how you react to DBL™ Pemetrexed (as disodium) powder for injection before you drive a car, operate machinery, or do anything else that could be dangerous.

Side effects

Tell your doctor, nurse or pharmacist as soon as possible if you do not feel well while you are taking DBL™ Pemetrexed (as disodium) powder for injection.

Like other medicines that treat cancer DBL™ Pemetrexed (as disodium) powder for injection may have unwanted side effects. All medicines can have side effects. Sometimes they are serious, most of the time they are not. You may need medical treatment if you get some of the side effects.

Ask your doctor or pharmacist to answer any questions you may have.

Tell your doctor, nurse or pharmacist if you notice any of the following and they worry you:

  • fatigue, drowsiness
  • high temperature
  • rash
  • sore throat
  • feeling dehydrated
  • pain in the stomach, upset stomach, nausea, loss of appetite, vomiting, indigestion
  • diarrhoea, constipation
  • muscle weakness
  • skin irritation, burning or prickling sensation
  • hair loss
  • conjunctivitis (red and itchy eyes with or without discharge and crusty eyelids).

Additional side effects when used in combination with other chemotherapy agents include:

  • taste change
  • loss of feeling
  • kidney problems where you pass little or no urine.

These are the more common side effects of DBL™ Pemetrexed (as disodium) powder for injection.

Tell your doctor or nurse as soon as possible if you notice any of the following:

  • fever or infection with a temperature, sweating or other signs of infection
  • pain, redness, swelling or sores in your mouth
  • sudden signs of allergy such as rash, itching or hives on the skin, swelling of the face, lips or tongue or other parts of the body, shortness of breath, wheezing or trouble breathing
  • tiredness, feeling faint or breathless, if you look pale
  • bleeding or bruising more easily than normal
  • coughing, difficulty breathing, wheezing caused by inflammation of the lung.

In rare cases DBL™ Pemetrexed (as disodium) powder for injection can cause inflammation of the colon (large bowel). Tell your doctor as soon as possible if you experience any of the following symptoms:

  • diarrhoea with blood and mucus
  • stomach pain
  • fever.

The above list includes serious side effects which may require medical attention.

If any of the following happen, tell your doctor or nurse immediately or go to the Emergency Department at your nearest hospital:

  • chest pain or fast heart beat
  • bleeding from the gums, nose or mouth, any bleeding that will not stop, reddish or pinkish urine, unexpected bruising.

These are very serious side effects. You may need urgent medical attention or hospitalisation.

Other side effects not listed above may occur in some patients. Tell your doctor, nurse or pharmacist if you notice anything that is making you feel unwell.

After using DBL™ Pemetrexed (as disodium) powder for injection

Storage

DBL™ Pemetrexed (as disodium) powder for injection will be stored in the pharmacy or on the ward. The injection is kept in a cool dry place, where the temperature stays below 25 °C.

Product description

What it looks like

DBL™ Pemetrexed (as disodium) powder for injection is a white to either light yellow or green yellow powder available in sterile single use 100 mg, 500 mg or 1000 mg vials.

Ingredients

Active ingredients:

  • pemetrexed disodium hemipentahydrate

Other ingredients

  • mannitol

Hydrochloric acid and/or sodium hydroxide may be added to both presentations to adjust pH.

DBL™ Pemetrexed (as disodium) powder for injection does not contain lactose, sucrose, gluten, tartrazine or any other azo dyes.

Sponsor

DBL™ Pemetrexed (as disodium) powder for injection is supplied by:

Australian Sponsor:

Pfizer Australia Pty Ltd
ABN 50 008 422 348
38-42 Wharf Road
West Ryde NSW 2114
Australia
Toll Free number:
1800 675 229

DBL™ Pemetrexed (as disodium) powder for injection is available in the following strengths:

100 mg, AUST R 182046

500 mg, AUST R 182045

1000 mg AUST R 228194

This leaflet was prepared in June 2017.

BRAND INFORMATION

Brand name

DBL Pemetrexed Powder for infusion

Active ingredient

Pemetrexed

Schedule

S4

 

Name of the medicine

Pemetrexed disodium hemipentahydrate.

Excipients.

Mannitol 98.04 mg (100 mg vial), 490.20 mg (500 mg vial), 980.40 mg (1000 mg vial). Hydrochloric acid and/or sodium hydroxide may have been added to adjust pH.

Description

Pemetrexed disodium hemipentahydrate has the chemical name N-[4-[2-(2-amino- 4,7-dihydro-4-oxo- 1H-pyrrolo[2,3-d] pyrimidin-5- yl) ethyl]benzoyl]-, L-glutamic acid disodium salt, hemipentahydrate. It has an empirical formula of C20H19N5Na2O6.2.5H2O and a molecular weight of 516.42. The CAS number for pemetrexed disodium is 150399-23-8 (Anhydrous). DBL Pemetrexed (as disodium) powder for injection is supplied as a sterile lyophilised powder for intravenous infusion available in single dose vials. The product is a white to either light yellow or green-yellow lyophilised solid. DBL Pemetrexed (as disodium) powder for injection is supplied in 1000 mg, 500 mg and 100 mg vials. Each 1000 mg vial contains pemetrexed disodium hemipentahydrate equivalent to 1000 mg pemetrexed and 980.40 mg of mannitol. Each 500 mg vial contains pemetrexed disodium hemipentahydrate equivalent to 500 mg pemetrexed and 490.20 mg of mannitol. Each 100 mg vial contains pemetrexed disodium hemipentahydrate equivalent to 100 mg pemetrexed and 98.04 mg of mannitol.
Hydrochloric acid and/or sodium hydroxide may have been added to adjust pH.

Pharmacology

Pharmacodynamic properties.

Pemetrexed is an antifolate antineoplastic agent. In vitro studies have shown that pemetrexed behaves as a multi-targeted antifolate by inhibiting thymidylate synthase (TS), dihydrofolate reductase (DHFR) and glycinamide ribonucleotide formyltransferase (GARFT), which are key folate-dependent enzymes for the de novo biosynthesis of thymidine and purine nucleotides that are essential for cell replication. Both the reduced folate carrier and membrane folate binding protein transport systems appear to be involved in transport of pemetrexed into cells. Once in the cell, pemetrexed is converted to polyglutamate forms by the enzyme folyl polyglutamate synthetase. The polyglutamate forms are even more potent inhibitors of TS and GARFT than pemetrexed. Polyglutamation is a time and concentration-dependent process that occurs in tumour cells and, to a lesser extent, in normal tissues.
Polyglutamated metabolites have a longer intracellular half-life than the parent drug, resulting in prolonged drug action in malignant cells. Data indicates that overexpression of thymidylate synthase (TS) correlates with reduced sensitivity to pemetrexed in antifolate-resistant cell lines. Results in a study with specimens from chemonaive patients with NSCLC demonstrated lower levels of TS expression in adenocarcinoma as compared to squamous cell carcinoma tumours. This data suggests that pemetrexed may offer greater efficacy for patients with adenocarcinoma as compared to squamous carcinoma histology.
An in vitro study with the MSTO-211H mesothelioma cell line showed synergistic effects when pemetrexed was combined with cisplatin.

Pharmacokinetic properties.

Absorption.

Pemetrexed is for intravenous administration only.

Distribution.

Pemetrexed has a steady-state volume of distribution of 16.1 litres. In vitro studies indicate that pemetrexed disodium is approximately 81% bound to plasma proteins. Binding is not affected by degree of renal impairment.

Metabolism.

Pemetrexed undergoes limited hepatic metabolism.

Elimination.

Pemetrexed is primarily eliminated in the urine with up to 70% to 90% of the dose recovered unchanged within the first 24 hours following administration. Total plasma clearance of pemetrexed is 92 mL/min, and the elimination half-life from plasma is 3.5 hours in patients with normal renal function.

Special populations.

Analyses to evaluate the pharmacokinetics of pemetrexed in special populations included 287 patients with a variety of advanced tumour types from 10 single-agent Phase 2 studies, 70 patients from the Phase 3 malignant pleural mesothelioma EMPHACIS trial, and 47 patients from a Phase 1 renal study.

Elderly.

No effect of age on the pharmacokinetics of pemetrexed was observed over a range of 26 to 80 years.

Hepatic insufficiency.

No effect of AST (SGOT), ALT (SGPT), or total bilirubin on the pharmacokinetics of pemetrexed disodium was observed. However, specific studies of hepatically impaired patients have not been conducted (see Precautions).

Renal insufficiency.

Pharmacokinetic analyses included 127 patients with reduced renal function. Total plasma clearance and renal clearance of pemetrexed decrease as renal function decreases. On average, patients with creatinine clearance of 45 mL/min will have a 56% increase in pemetrexed total systemic exposure (AUC) relative to patients with creatinine clearance of 90 mL/min (see Precautions and Dosage and Administration).

Clinical Trials

Malignant pleural mesothelioma.

The safety and efficacy of pemetrexed have been evaluated in chemonaive patients with malignant pleural mesothelioma (MPM) as a single-agent and in combination with platinum-based regimens.
EMPHACIS, a multicentre, randomised, single-blind phase 3 study of pemetrexed plus cisplatin versus cisplatin in chemonaive patients with malignant pleural mesothelioma, has shown that patients treated with pemetrexed and cisplatin had a clinically meaningful 2.8-month median survival advantage over patients receiving cisplatin alone. Pemetrexed was administered intravenously over 10 minutes at a dose of 500 mg/m2 and cisplatin was administered intravenously over 2 hours at a dose of 75 mg/m2 beginning approximately 30 minutes after the end of administration of pemetrexed. Both drugs were given on Day 1 of each 21-day cycle. On this study, treatment was administered up to 6 cycles. Additional cycles were permitted for patients who were receiving benefit from therapy.
During the study, low-dose folic acid and vitamin B12 supplementation was introduced to patients’ therapy to reduce toxicity. The primary analysis of this study was performed on the population of all patients randomly assigned to a treatment arm who received study drug (randomised and treated). A subgroup analysis was performed on patients who received folic acid and vitamin B12 supplementation during the entire course of study therapy (fully supplemented).
Table 1 summarises the efficacy results for all patients regardless of vitamin supplementation status and those patients receiving vitamin supplementation from the time of enrolment in the trial.
Table 2 summarises the number of cycles of treatment completed by randomised and treated patients and fully supplemented patients. Patients who never received folic acid and vitamin B12 during study therapy received a median of 2 cycles in both treatment arms.
A statistically significant improvement of the clinically relevant symptoms (pain and dyspnoea) associated with malignant pleural mesothelioma in the pemetrexed/cisplatin arm (212 patients) versus the cisplatin arm alone (218 patients) was demonstrated using the Lung Cancer Symptom Scale (LCCS). By the end of treatment (after 6 cycles), there was a statistically significant difference in favour of pemetrexed/cis for the symptoms of dyspnoea, pain, fatigue, symptom distress, interference with activity, and total LCSS. Statistically significant differences in pulmonary function tests were also observed. Differences favouring the pemetrexed/cis arm were seen in all pulmonary function tests early in therapy; these differences were occasionally significant in early cycles but uniformly became significant in later cycles. The separation between the treatment arms was achieved by improvement in lung function in the pemetrexed/cis arm and deterioration of lung function over time in the control arm.

Non-small cell lung cancer.

The safety and efficacy of pemetrexed have been evaluated in combination with cisplatin as initial treatment for Non-Small Cell Lung Cancer (NSCLC) and as a single-agent in patients who have previously received chemotherapy treatment.
A multicentre, randomised, open-label Phase 3 study of pemetrexed plus cisplatin versus gemcitabine plus cisplatin (for up to 6 cycles) in chemonaive patients with locally advanced or metastatic (Stage IIIb or IV) non-small cell lung cancer (NSCLC) showed that pemetrexed plus cisplatin (Intent-To-Treat [ITT] population n = 862) met its primary endpoint and showed similar clinical efficacy as gemcitabine plus cisplatin (ITT n = 863) in overall survival (adjusted hazard ratio 0.94; 95% CI 0.84-1.05). (See Figure 1 and Table 3.)
A series of subsets of patients were examined in pre-specified adjusted analyses as shown in Figure 2.
The analysis of the impact of NSCLC histology on overall survival demonstrated statistically significant superiority for pemetrexed + cisplatin in the adenocarcinoma (n=846, 12.6 versus 10.9 months, adjusted HR = 0.84; 95% CI = 0 .71-0.99, p = 0.033) and large cell carcinoma subgroups (n=153, 10.4 versus 6.7, adjusted HR = 0 .67; 95% CI = 0.48-0.96, p = 0.027) but not in patients with squamous cell carcinoma (n=473, 9.4 versus 10.8 months, adjusted HR = 1.23; 95% CI = 1.00-1. 51, p = 0.050) or patients with other histologies (n=250, 8.6 versus 9.2, adjusted HR = 1.08; 95% CI = 0.81-1.45, p = 0.586). The results of the analysis of overall survival in patients with adenocarcinoma and large cell carcinoma are shown in Figure 3.
On this study, treatment was administered up to 6 cycles.
There were no clinically relevant differences observed for the safety profile of pemetrexed plus cisplatin within the histology subgroups.
A multicentre, randomised, double-blind, placebo-controlled Phase 3 study (JMEN), compared the efficacy and safety of maintenance treatment with pemetrexed plus best supportive care (BSC) (n = 441) with that of placebo plus BSC (n = 222) in patients with locally advanced (Stage IIIB) or metastatic (Stage IV) Non Small Cell Lung Cancer (NSCLC) who did not progress after 4 cycles of first line doublet therapy. All patients included in this study had an ECOG performance status 0 or 1. Patients received maintenance treatment until disease progression. Efficacy and safety were measured from the time of randomisation after completion of first line (induction) therapy. Patients received a median of 5 cycles of maintenance treatment with pemetrexed and 3.5 cycles of placebo. A total of 213 patients (48.3%) completed ≥ 6 cycles and a total of 103 patients (23.4%) completed ≥ 10 cycles of treatment with pemetrexed.
In the overall study population, pemetrexed was statistically superior to placebo in terms of overall survival (OS) (median 13.4 months versus 10.6 months, HR=0.79 (95% CI: 0.65-0.95), p-value=0.012) and PFS (median 4.0 months versus 2.0 months, HR=0.60 (95% CI: 0.49-0.73), p-value < 0.00001). Consistent with previous pemetrexed studies, a difference in treatment outcomes was observed according to histologic classification. For the indicated population i.e. patients with NSCLC other than predominantly squamous cell histology, pemetrexed was superior to placebo for OS (median 15.5 months versus 10.3 months, HR=0.70 (95% CI: 0.56-0.88)) and PFS (median 4.4 months versus 1.8 months, HR=0.47 (95% CI: 0.37-0.60)).
The PFS and OS results in patients with squamous cell histology suggested no advantage for pemetrexed over placebo.
There were no clinically relevant differences observed for the safety profile of pemetrexed within the histology subgroups. See Figure 4.
A multicentre, randomised, open label phase 3 study of pemetrexed versus docetaxel (with treatment until progression) in patients with locally advanced or metastatic NSCLC after prior chemotherapy has shown median survival times of 8.3 months for patients treated with pemetrexed (Intent To Treat population n = 283) and 7.9 months for patients treated with docetaxel (ITT n = 288) which is not statistically significantly different. These data, as outlined in Table 4, indicate comparable efficacy between pemetrexed and docetaxel.
On this study, treatment was administered until disease progression.
An analysis of the impact of NSCLC histology on overall survival was in favour of pemetrexed versus docetaxel for other than predominantly squamous histology (n=399, 9.3 versus 8.0 months, adjusted HR = 0.78; 95% CI = 0 .61-1.00, p = 0.047) and was in favour of docetaxel for squamous cell carcinoma histology (n=172, 6.2 versus 7.4 months, adjusted HR = 1.56; 95% CI = 1.08-2.26, p = 0.018). There were no clinically relevant differences observed for the safety profile of pemetrexed within the histology subgroups.

Indications

Malignant pleural mesothelioma.

DBL Pemetrexed (as disodium) powder for injection, in combination with cisplatin, is indicated for the treatment of patients with malignant pleural mesothelioma.

Non-small cell lung cancer.

DBL Pemetrexed (as disodium) powder for injection in combination with cisplatin is indicated for initial treatment of patients with locally advanced or metastatic non-small cell lung cancer other than predominantly squamous cell histology.
DBL Pemetrexed (as disodium) powder for injection as monotherapy is indicated for the treatment of patients with locally advanced or metastatic non-small cell lung cancer other than predominantly squamous cell histology after prior platinum-based chemotherapy.

Contraindications

DBL Pemetrexed (as disodium) powder for injection is contraindicated in patients who have a history of severe hypersensitivity reaction to pemetrexed or to any excipients in this product.

Precautions

DBL Pemetrexed (as disodium) powder for injection can suppress bone marrow function as manifested by anaemia, neutropenia, thrombocytopenia, or pancytopenia. (see Adverse Effects). Myelosuppression is usually the dose-limiting toxicity. Patients should be monitored for myelosuppression during therapy and DBL Pemetrexed (as disodium) powder for injection should not be given to patients until absolute neutrophil count (ANC) returns to ≥ 1500 cells/mm3 and platelet count returns to ≥ 100,000 cells/mm3. Dose reductions for subsequent cycles are based on nadir ANC, platelet count, and maximum nonhaematologic toxicity seen in the previous cycle (see Dose reduction recommendations under Dosage and Administration).
Patients treated with DBL Pemetrexed (as disodium) powder for injection must be instructed to take folic acid and vitamin B12 with DBL Pemetrexed (as disodium) powder for injection as a prophylactic measure to reduce treatment-related toxicity (see Dosage and Administration). In the Phase 3 mesothelioma EMPHACIS trial, less overall toxicity and reductions in Grade 3/4 haematologic and nonhaematologic toxicities such as neutropenia, febrile neutropenia, and infection with Grade 3/4 neutropenia were reported when pre-treated with folic acid and vitamin B12 was administered.
Serious renal events, including acute renal failure, have been reported with pemetrexed alone or in association with other chemotherapeutic agents. Many of the patients in whom these occurred had underlying risk factors for the development of renal events including dehydration or pre-existing hypertension or diabetes.
Due to the gastrointestinal toxicity of pemetrexed given in combination with cisplatin, severe dehydration has been observed. Therefore, patients should receive adequate antiemetic treatment and appropriate hydration prior to and/or after receiving treatment.
Serious cardiovascular events, including myocardial infarction and cerebrovascular events have been uncommonly reported during clinical studies with pemetrexed, usually when given in combination with another cytotoxic agent. Most of the patients in whom these events have been observed had pre-existing cardiovascular risk factors.
Immunodepressed status is common in cancer patients. As a result, concomitant use of live attenuated vaccines is not recommended.
Cases of radiation pneumonitis have been reported in patients treated with radiation either prior, during or subsequent to their pemetrexed therapy. Particular attention should be paid to these patients and caution exercised with use of other radio-sensitising agents. Cases of radiation recall have been reported in patients who received radiotherapy weeks or years previously.

Renally impaired patients.

Pemetrexed is primarily eliminated unchanged by renal excretion. Insufficient numbers of patients have been studied with creatinine clearance below 45 mL/min. Therefore, DBL Pemetrexed (as disodium) powder for injection should not be administered to patients whose creatinine clearance is < 45 mL/min (see Dose reduction recommendations under Dosage and Administration).

Hepatically impaired patients.

Pemetrexed is not extensively metabolised by the liver. However, patients with hepatic impairment such as bilirubin > 1.5 times the upper limit of normal (ULN) or transaminase > 3 times the ULN (hepatic metastases absent) or > 5 time the ULN (hepatic metastases present) have not been specifically studied.
DBL Pemetrexed (as disodium) powder for injection should be administered under the supervision of a qualified physician experienced in the use of antineoplastic agents.
Appropriate management of complications is possible only when adequate diagnostic and treatment facilities are readily available. Treatment-related adverse events of pemetrexed seen in clinical trials have been reversible. Skin rash has been reported in patients not pre-treated with a corticosteroid in clinical trials. Pre-treatment with dexamethasone (or equivalent) reduces the incidence and severity of cutaneous reaction (see Dosage and Administration).
The effect of third space fluid, such as pleural effusion and ascites, on pemetrexed is unknown. In patients with clinically significant third space fluid, consideration should be given to draining the effusion prior to DBL Pemetrexed (as disodium) powder for injection administration.

Carcinogenicity.

Studies to assess the carcinogenic potential of pemetrexed have not been conducted.

Genotoxicity.

Pemetrexed has been shown to be clastogenic in the in vivo micronucleus assay in the mouse, but was negative in the in vitro chromosome aberration test in Chinese hamster ovary cells.
Pemetrexed was negative in assays for gene mutation (bacteria and mammalian cells in vitro).

Effects on fertility.

Administration of pemetrexed to male mice at intraperitoneal doses of ≥ 0.3 mg/m2/day resulted in reproductive toxicity characterised by reduced fertility, hypospermia, and testicular atrophy.

Use in pregnancy.

(Category D)
Pregnancy Category D: Drugs which have caused, are suspected to have caused, or may be expected to cause, an increased incidence of human fetal malformations or irreversible damage. These drugs may also have adverse pharmacological effects. Accompanying texts should be consulted for further details.
The use of DBL Pemetrexed (as disodium) powder for injection should be avoided in pregnant women because of the potential hazard to the foetus. Pemetrexed was teratogenic (causing cleft palate) in mice at intravenous doses of 15 mg/m2/day. Other embryofetal toxic effects (embryofetal deaths, reduced fetal weights and incomplete ossification) were also observed. Embryofetal toxicity was observed at the lowest dose tested (0.6 mg/m2/day).

Use in lactation.

It is not known whether pemetrexed is excreted in human milk. Therefore, breast-feeding should be discontinued during therapy with DBL Pemetrexed (as disodium) powder for injection.

Paediatric use.

DBL Pemetrexed (as disodium) powder for injection is not recommended for use in patients under 18 years of age, as safety and efficacy have not been established in this group of patients.

Use in the elderly.

In clinical studies, there has been no indication that patients 65 years of age or older are at increased risk of adverse events compared to patients younger than 65 years old. No dose reductions other than those recommended for all patients are necessary.

Effects on ability to drive and use machinery.

No studies on the effects on the ability to drive and use machines have been performed. However, it has been reported that pemetrexed may cause fatigue. Therefore patients should be cautioned against driving or operating machinery if this event occurs.

Interactions

Pemetrexed is primarily eliminated unchanged renally as a result of glomerular filtration and tubular secretion. In vitro studies indicate that pemetrexed is actively secreted by the organic anion transporter 3 (OAT3) in the kidney. In vitro work also indicates that pemetrexed has affinity for OAT4 but the role of OAT4 in the renal elimination of molecules in not fully understood. Concomitant administration of nephrotoxic drugs and/or substances that are tubularly secreted could result in delayed clearance of pemetrexed.
Results from in vitro studies with human liver microsomes suggest that pemetrexed would not cause clinically significant interactions with drugs metabolised by CYP3A, CYP2D6, CYP2C9, and CYP1A2.
The pharmacokinetics of pemetrexed are not influenced by oral folic acid and intramuscular vitamin B12 supplementation or by concurrently administered cisplatin. Total platinum clearance is not affected by pemetrexed administration.
Although NSAIDs in moderate doses can be administered with pemetrexed in patients with normal renal function (creatinine clearance ≥ 80 mL/min), renal clearance was reduced by 16% when ibuprofen was concurrently administered with pemetrexed in patients with normal renal function. Caution should be used when administering NSAIDs concurrently with pemetrexed to patients with mild to moderate renal insufficiency (creatinine clearance of 45-79 mL/min). It is recommended that patients with mild to moderate renal insufficiency should avoid taking NSAIDs with short elimination half-lives for a period of 2 days before, the day of, and 2 days following administration of pemetrexed.
In the absence of data regarding potential interaction between pemetrexed and NSAIDs with longer half-lives in patients with mild to moderate renal insufficiency, patients with mild to moderate renal insufficiency taking these NSAIDs should interrupt dosing for at least 5 days before, the day of, and 2 days following pemetrexed administration. If concomitant administration of NSAIDs is necessary, patients should be monitored closely for toxicity, especially myelosuppression and gastrointestinal toxicity.

Adverse Effects

Single agent pemetrexed (NSCLC).

Table 5 provides the frequency and severity of undesirable effects that have been reported in > 5% of 265 patients randomly assigned to receive single agent pemetrexed with folic acid and vitamin B12 supplementation and 276 patients randomly assigned to receive single agent docetaxel. All patients were diagnosed with locally advanced or metastatic NSCLC and received prior chemotherapy.
Very common: ≥ 10%; Common: > 5% and < 10% (for the purpose of this table a cut off of 5% was used for inclusion of all events where the reporter considered a possible relationship to pemetrexed).
Clinically relevant CTC toxicity that was reported in ≥ 1% and ≤ 5% (common) of the patients that were randomly assigned to pemetrexed include: sensory neuropathy, motor neuropathy, abdominal pain, increased creatinine, febrile neutropenia, infection without neutropenia, allergic reaction/hypersensitivity and erythema multiforme.
Clinically relevant CTC toxicity that was reported in < 1% (uncommon) of the patients that were randomly assigned to pemetrexed include supraventricular arrhythmias.
Clinically relevant Grade 3 and Grade 4 laboratory toxicities were similar between integrated Phase 2 results from three single agent pemetrexed studies (n=164) and the Phase 3 single agent pemetrexed study described above, with the exception of neutropenia (12.8% versus 5.3%, respectively) and alanine transaminase elevation (15.2% versus 1.9%, respectively).
These differences were likely due to differences in the patient population, since the phase 2 studies included chemonaive and heavily pre-treated breast cancer patients with pre-existing liver metastases and/or abnormal baseline liver function tests.

Combination with cisplatin (MPM).

Table 6 provides the frequency and severity of undesirable effects that have been reported in > 5% of 168 patients with mesothelioma who were randomly assigned to receive cisplatin and pemetrexed and 163 patients with mesothelioma randomly assigned to receive single agent cisplatin. In both treatment arms, these chemonaive patients were fully supplemented with folic acid and vitamin B12.
Very common: > 10%; Common: > 5% and < 10% (for the purpose of this table a cut off of 5% was used for inclusion of all events where the reporter considered a possible relationship to pemetrexed and cisplatin).
Clinically relevant toxicity that was reported in ≥ 1% and ≤ 5% (common) of the patients that were randomly assigned to receive cisplatin and pemetrexed include: increased AST (SGOT), ALT (SGPT), and GGT, infection, febrile neutropenia, renal failure, chest pain, pyrexia and urticaria.
Clinically relevant toxicity that was reported in < 1% (uncommon) of the patients that were randomly assigned to receive cisplatin and pemetrexed include arrhythmia and motor neuropathy.

Combination with cisplatin (NSCLC).

Table 7 provides the frequency and severity of undesirable effects considered possibly related to study drug that have been reported in > 5% of 839 patients with NSCLC who were randomised to study and received cisplatin and pemetrexed and 830 patients with NSCLC who were randomised to study and received cisplatin and gemcitabine. All patients received study therapy as initial treatment for locally advanced or metastatic NSCLC and patients in both treatment groups were fully supplemented with folic acid and vitamin B12.
Very common: ≥ 10%; Common: > 5% and < 10%. For the purpose of this table, a cut-off of 5% was used for inclusion of all events where the reporter considered a possible relationship to pemetrexed and cisplatin).
Clinically relevant toxicity that was reported in ≥ 1% and ≤ 5% (common) of the patients that were randomly assigned to receive cisplatin and pemetrexed include: AST increase, ALT increase, infection, febrile neutropenia, renal failure, pyrexia, dehydration, conjunctivitis, and creatinine clearance decrease.
Clinically relevant toxicity that was reported in < 1% (uncommon) of the patients that were randomly assigned to receive cisplatin and pemetrexed include: GGT increase, chest pain, arrhythmia, and motor neuropathy. Acute renal failure was observed more commonly in the pemetrexed/cisplatin arm (6 cases, 0.7%) than in the gemcitabine/cisplatin arm (0 cases).

Single agent pemetrexed (NSCLC maintenance).

Table 8 provides the frequency and severity of undesirable effects considered possibly related to study drug that have been reported in > 5% of 441 patients randomly assigned to receive single agent pemetrexed and 222 patients randomly assigned to receive placebo in the single-agent maintenance pemetrexed study (Study JMEN). All patients were diagnosed with Stage IIIB or IV NSCLC and had received prior platinum-based chemotherapy. Patients in both study arms were fully supplemented with folic acid and vitamin B12.
Clinically relevant CTC toxicity of any grade that was reported in ≥ 1% and ≤ 5% (common) of the patients that were randomly assigned to pemetrexed include: decreased platelets, decreased creatinine clearance, constipation, oedema, alopecia, increased creatinine, pruritus/itching, fever (in the absence of neutropenia), ocular surface disease (including conjunctivitis), increased lacrimation, and decreased glomerular filtration rate.
Clinically relevant CTC toxicity that was reported in < 1% (uncommon) of the patients that were randomly assigned to pemetrexed includes: febrile neutropenia, allergic reaction/hypersensitivity, motor neuropathy, erythema multiforme, renal failure, and supraventricular arrhythmia.
The incidence of adverse reactions was evaluated for patients who received ≤ 6 cycles of pemetrexed, and compared to patients who received > 6 cycles of pemetrexed. Increases in adverse reactions (all grades) were observed with longer exposure; however, no statistically significant differences in Grade 3/4 adverse reactions were seen.
In clinical trials, sepsis which in some cases was fatal occurred in approximately 1% of patients.

Post-marketing data.

Gastrointestinal disorders.

Rare cases of colitis have been reported in patients treated with pemetrexed.

General disorders and administration site conditions.

Rare cases of oedema have been reported in patients treated with pemetrexed.

Injury, poisoning and procedural complications.

Rare cases of radiation recall have been reported in patients who have previously received radiotherapy.

Respiratory disorders.

Rare cases of interstitial pneumonitis have been reported in patients treated with pemetrexed.

Skin.

Rare cases of bullous conditions have been reported including Stevens-Johnson syndrome and Toxic epidermal necrolysis which in some cases were fatal.
Rare - ≤ 0.1% of patients treated with pemetrexed.

Dosage and Administration

DBL Pemetrexed (as disodium) powder for injection should be administered under the supervision of a qualified physician experienced in the use of antineoplastic agents.

DBL Pemetrexed (as disodium) powder for injection in combination use with cisplatin.

Adults.

The recommended dose of DBL Pemetrexed (as disodium) powder for injection is 500 mg/m2 as body surface area (BSA) administered as an intravenous infusion over 10 minutes on the first day of each 21-day cycle.
The recommended dose of cisplatin is 75 mg/m2 BSA infused over 2 hours approximately 30 minutes after completion of infusion with DBL Pemetrexed (as disodium) powder for injection on the first day of each 21-day cycle. Patients must receive adequate anti-emetic treatment and appropriate hydration prior to and/or after receiving cisplatin. See cisplatin Product Information document for specific dosing advice.

Single agent use.

Adults.

The recommended dose of DBL Pemetrexed (as disodium) powder for injection is 500 mg/m2 BSA administered as an intravenous infusion over 10 minutes on the first day of each 21-day cycle.

Premedication regimen.

Skin rash has been reported in patients not pre-treated with a corticosteroid. Pre-treatment with dexamethasone (or equivalent) reduces the incidence and severity of cutaneous reaction.
In clinical trials, dexamethasone 4 mg was given by mouth twice daily the day before, the day of, and the day after administration with pemetrexed.
To reduce toxicity, patients treated with pemetrexed must be instructed to take a low-dose oral folic acid preparation or a multivitamin containing folic acid on a daily basis. At least 5 daily doses of folic acid must be taken during the 7-day period preceding the first dose pemetrexed, and dosing should continue during the full course of therapy and for 21 days after the last dose of pemetrexed. Patients must also receive one intramuscular injection of vitamin B12 during the week preceding the first dose of pemetrexed and every 3 cycles thereafter. Subsequent vitamin B12 injections may be given the same day as pemetrexed. In clinical trials, the dose of folic acid studied ranged from 350 to 1000 microgram, and the dose of vitamin B12 received was 1000 microgram. The most commonly used dose of oral folic acid was 400 microgram.

Laboratory monitoring and dose reduction recommendations.

Monitoring.

It is recommended that patients receiving DBL Pemetrexed (as disodium) powder for injection be monitored before each dose with a complete blood count, including a differential and platelet count. Periodic blood chemistry tests should be collected to evaluate renal and hepatic function.
Absolute neutrophil count (ANC) should be ≥ 1500 cells/mm3 and platelets ≥ 100,000 cells/mm3 prior to scheduled administration of any cycle.

Dose reduction recommendations.

Dose adjustments at the start of a subsequent cycle should be based on nadir haematologic counts or maximum nonhaematologic toxicity from the preceding cycle of therapy. Treatment may be delayed to allow sufficient time for recovery. Upon recovery, patients should be retreated using the guidelines in Tables 9 - 11 which are suitable for using DBL Pemetrexed (as disodium) powder for injection as a single agent or in combination with cisplatin.
If patients develop nonhaematologic toxicities (excluding neurotoxicity) ≥ Grade 3, treatment should be withheld until resolution to less than or equal to the patient’s pre-therapy value.
Treatment should be resumed according to the guidelines in Table 10.
In the event of neurotoxicity, the recommended dose adjustment for pemetrexed and cisplatin is documented in Table 11. Patients should discontinue therapy if Grade 3 or 4 neurotoxicity is observed.
DBL Pemetrexed (as disodium) powder for injection therapy should be discontinued if a patient experiences any haematologic or nonhaematologic Grade 3 or 4 toxicity after 2 dose reductions or immediately if Grade 3 or 4 neurotoxicity is observed.

Elderly patients.

In clinical trials, there has been no indication that patients 65 years of age or older are at increased risk of adverse events compared with patients younger than 65. No dose reductions other than those recommended for all patients are necessary.

Renally impaired patients.

In clinical studies, patients with creatinine clearance of at least 45 mL/min required no dose adjustments other than those recommended for all patients. Insufficient numbers of patients with creatinine clearance below 45 mL/min have been treated to make dosage recommendations for this group of patients. Therefore, patients should not receive DBL Pemetrexed (as disodium) powder for injection whose creatinine clearance is < 45 mL/min [using the standard Cockcroft and Gault formula or GFR measured by Tc99m-DPTA serum clearance method].

Preparation and administration instructions: use aseptic technique.

Reconstitution and further dilution prior to intravenous infusion is only recommended with 0.9% sodium chloride injection. DBL Pemetrexed (as disodium) powder for injection is physically incompatible with diluents containing calcium, including Lactated Ringer’s Injection and Ringer’s Injection. Co-administration of DBL Pemetrexed (as disodium) powder for injection with other drugs and diluents has not been studied, and therefore is not recommended.
1. Use appropriate aseptic technique during the reconstitution and further dilution of DBL Pemetrexed (as disodium) powder for injection for intravenous infusion administration.
2. Calculate the dose and the number of DBL Pemetrexed (as disodium) powder for injection vials needed. A 1000 mg vial contains 1000 mg of pemetrexed. A 500 mg vial contains 500 mg of pemetrexed. A 100 mg vial contains 100 mg of pemetrexed. The vial contains an excess of pemetrexed to facilitate delivery of label amount.
3. Prior to administration, reconstitute 1000 mg vials with 40 mL of 0.9% sodium chloride injection to give a solution containing 25 mg/mL pemetrexed. Reconstitute 500 mg vials with 20 mL of 0.9% sodium chloride injection to give a solution containing 25 mg/mL pemetrexed. Reconstitute 100 mg vials with 4.2 mL of 0.9% sodium chloride injection to give a solution containing 25 mg/mL pemetrexed.
4. Gently swirl each vial until the powder is completely dissolved. The resulting solution is clear and ranges in colour from colourless to yellow or green-yellow without adversely affecting product quality. The pH of the reconstituted DBL Pemetrexed (as disodium) powder for injection solution is between 6.6 and 7.8. Further dilution is required.
5. The appropriate volume of reconstituted DBL Pemetrexed (as disodium) powder for injection solution should be further diluted to 100 mL with 0.9% sodium chloride injection and administered as an intravenous infusion over 10 minutes.
6. Parenteral drug products should be inspected visually for particulate matter and discolouration prior to administration.
Chemical and physical stability of reconstituted and infusion solutions of DBL Pemetrexed (as disodium) powder for injection was demonstrated for up to 24 hours after reconstitution of the original vial when stored below 25°C. However, because DBL Pemetrexed (as disodium) powder for injection and the recommended diluent contain no antimicrobial preservatives, to reduce antimicrobial hazard, reconstituted and infusion solutions should be used immediately. Discard any unused portion. Product is for single use in one patient on one occasion only.

Overdosage

Reported symptoms of pemetrexed overdose include neutropenia, anaemia, thrombocytopenia, mucositis, and rash. Anticipated complications of overdose include bone marrow suppression as manifested by neutropenia, thrombocytopenia and anaemia. In addition, infection with or without fever, diarrhoea, and mucositis may be seen.
If overdose occurs, general supportive measures should be instituted as deemed necessary by the treating physician. Management of DBL Pemetrexed (as disodium) powder for injection overdose should include consideration of the use of leucovorin or thymidine rescue.

Presentation

DBL Pemetrexed (as disodium) powder for injection is available in sterile single-use glass vials containing: 100 mg, 500 mg or 1000 mg pemetrexed (pack size 1 vial).
The product is a white to either light yellow or green-yellow lyophilised solid.

Storage

Store below 25°C. DBL Pemetrexed (as disodium) powder for injection is not light sensitive.

Poison Schedule

S4.