Inlyta ▼ 1 mg film-coated tablets

Inlyta ▼ 5 mg film-coated tablets

1 mg film-coated tablets

Each film-coated tablet contains 1 mg of axitinib.

5 mg film-coated tablets

Each film-coated tablet contains 5 mg of axitinib.

Excipients with known effect :

1 mg film-coated tablets

Each film-coated tablet contains 33.6 mg of lactose monohydrate.

5 mg film-coated tablets

Each film-coated tablet contains 58.8 mg of lactose monohydrate For the full list of excipients, see section 6.1.

Film-coated tablet.

1 mg: Red oval film-coated tablet debossed with “Pfizer” on one side and “1 XNB” on the other.

5 mg: Red triangular film-coated tablet debossed with “Pfizer” on one side and “5 XNB” on the other.

Inlyta is indicated for the treatment of adult patients with advanced renal cell carcinoma (RCC) after failure of prior treatment with sunitinib or a cytokine.

Treatment with Inlyta should be conducted by a physician experienced in the use of anticancer therapies.

Posology

The recommended starting dose of axitinib is 5 mg twice daily.

Treatment should continue as long as clinical benefit is observed or until unacceptable toxicity occurs that cannot be managed by concomitant medicinal products or dose adjustments.

If the patient vomits or misses a dose, an additional dose should not be taken. The next prescribed dose should be taken at the usual time.

Dose adjustments

Dose increase or reduction is recommended based on individual safety and tolerability.

Patients who tolerate the axitinib starting dose of 5 mg twice daily with no adverse reactions > Grade 2 (i.e. without severe adverse reactions according to the Common Terminology Criteria for Adverse Events [CTCAE] version 3.0) for two consecutive weeks may have their dose increased to 7 mg twice daily unless the patient's blood pressure is > 150/90 mmHg or the patient is receiving antihypertensive treatment. Subsequently, using the same criteria, patients who tolerate an axitinib dose of 7 mg twice daily may have their dose increased to a maximum of 10 mg twice daily.

Management of some adverse reactions may require temporary or permanent discontinuation and/or dose reduction of axitinib therapy (see section 4.4). When dose reduction is necessary, the axitinib dose may be reduced to 3 mg twice daily and further to 2 mg twice daily.

Dose adjustment is not required on the basis of patient age, race, gender, or body weight.

Concomitant strong CYP3A4/5 inhibitors

Co-administration of axitinib with strong CYP3A4/5 inhibitors may increase axitinib plasma concentrations (see section 4.5). Selection of an alternate concomitant medicinal product with no or minimal CYP3A4/5 inhibition potential is recommended.

Although axitinib dose adjustment has not been studied in patients receiving strong CYP3A4/5 inhibitors, if a strong CYP3A4/5 inhibitor must be co-administered, a dose decrease of axitinib to approximately half the dose (e.g. the starting dose should be reduced from 5 mg twice daily to 2 mg twice daily) is recommended. Management of some adverse reactions may require temporary or permanent discontinuation of axitinib therapy (see section 4.4). If co-administration of the strong inhibitor is discontinued, a return to the axitinib dose used prior to initiation of the strong CYP3A4/5 inhibitor should be considered (see section 4.5).

Concomitant strong CYP3A4/5 inducers

Co-administration of axitinib with strong CYP3A4/5 inducers may decrease axitinib plasma concentrations (see section 4.5). Selection of an alternate concomitant medicinal product with no or minimal CYP3A4/5 induction potential is recommended.

Although axitinib dose adjustment has not been studied in patients receiving strong CYP3A4/5 inducers, if a strong CYP3A4/5 inducer must be co-administered, a gradual dose increase of axitinib is recommended. Maximal induction with high-dose strong CYP3A4/5 inducers has been reported to occur within one week of treatment with the inducer. If the dose of axitinib is increased, the patient should be monitored carefully for toxicity. Management of some adverse reactions may require temporary or permanent discontinuation and/or dose reduction of axitinib therapy (see section 4.4). If co-administration of the strong inducer is discontinued, the axitinib dose should be immediately returned to the dose used prior to initiation of the strong CYP3A4/5 inducer (see section 4.5).

Special populations

Elderly patients (≥ 65 years): No dose adjustment is required (see sections 4.4 and 5.2).

Renal impairment: No dose adjustment is required (see section 5.2). Virtually no data are available regarding axitinib treatment in patients with a creatinine clearance of < 15 ml/min.

Hepatic impairment: No dose adjustment is required when administering axitinib to patients with mild hepatic impairment (Child-Pugh class A). A dose decrease is recommended when administering axitinib to patients with moderate hepatic impairment (Child-Pugh class B) (e.g. the starting dose should be reduced from 5 mg twice daily to 2 mg twice daily). Axitinib has not been studied in patients with severe hepatic impairment (Child-Pugh class C) and should not be used in this population (see sections 4.4 and 5.2).

Paediatric population

The safety and efficacy of axitinib in children (< 18 years) have not been established. No data are available.

Method of administration

Axitinib should be taken orally twice daily approximately 12 hours apart with or without food (see section 5.2). Axitinib tablets should be swallowed whole with a glass of water.

Hypersensitivity to axitinib or to any of the excipients listed in section 6.1.

Specific safety events should be monitored before initiation of, and periodically throughout, treatment with axitinib as described below.

Hypertension

In a controlled clinical study with axitinib for the treatment of patients with RCC, hypertension was very commonly reported (see section 4.8). The median onset time for hypertension (systolic blood pressure > 150 mmHg or diastolic blood pressure > 100 mmHg) was within the first month of the start of axitinib treatment and blood pressure increases have been observed as early as 4 days after starting axitinib.

Blood pressure should be well-controlled prior to initiating axitinib. Patients should be monitored for hypertension and treated as needed with standard anti-hypertensive therapy. In the case of persistent hypertension, despite use of anti-hypertensive medicinal products, the axitinib dose should be reduced. For patients who develop severe hypertension, temporarily interrupt axitinib and restart at a lower dose once the patient is normotensive. If axitinib is interrupted, patients receiving antihypertensive medicinal products should be monitored for hypotension (see section 4.2).

In case of severe or persistent arterial hypertension and symptoms suggestive of posterior reversible encephalopathy syndrome (see below), a diagnostic brain magnetic resonance image (MRI) should be considered.

Thyroid dysfunction

In a controlled clinical study with axitinib for the treatment of patients with RCC, events of hypothyroidism and, to a lesser extent, hyperthyroidism, were reported (see section 4.8).

Thyroid function should be monitored before initiation of, and periodically throughout, treatment with axitinib. Hypothyroidism or hyperthyroidism should be treated according to standard medical practice to maintain euthyroid state.

Arterial embolic and thrombotic events

In clinical studies with axitinib, arterial embolic and thrombotic events (including transient ischemic attack, myocardial infarction, cerebrovascular accident and retinal artery occlusion) were reported (see section 4.8).

Axitinib should be used with caution in patients who are at risk for, or who have a history of, these events. Axitinib has not been studied in patients who had an arterial embolic or thrombotic event within the previous 12 months.

Venous embolic and thrombotic events

In clinical studies with axitinib, venous embolic and thrombotic events (including pulmonary embolism, deep vein thrombosis, and retinal vein occlusion/thrombosis) were reported (see section 4.8).

Axitinib should be used with caution in patients who are at risk for, or who have a history of, these events. Axitinib has not been studied in patients who had a venous embolic or thrombotic event within the previous 6 months.

Elevation of haemoglobin or haematocrit

Increases in haemoglobin or haematocrit, reflective of increases in red blood cell mass, may occur during treatment with axitinib (see section 4.8, polycythaemia). An increase in red blood cell mass may increase the risk of embolic and thrombotic events.

Haemoglobin or haematocrit should be monitored before initiation of, and periodically throughout, treatment with axitinib. If haemoglobin or haematocrit becomes elevated above the normal level, patients should be treated according to standard medical practice to decrease haemoglobin or haematocrit to an acceptable level.

Haemorrhage

In clinical studies with axitinib, haemorrhagic events were reported (see section 4.8).

Axitinib has not been studied in patients who have evidence of untreated brain metastasis or recent active gastrointestinal bleeding, and should not be used in those patients. If any bleeding requires medical intervention, temporarily interrupt the axitinib dose.

Gastrointestinal perforation and fistula formation

In clinical studies with axitinib, events of gastrointestinal perforation and fistulas were reported (see section 4.8).

Symptoms of gastrointestinal perforation or fistula should be periodically monitored for throughout treatment with axitinib.

Wound healing complications

No formal studies of the effect of axitinib on wound healing have been conducted.

Treatment with axitinib should be stopped at least 24 hours prior to scheduled surgery. The decision to resume axitinib therapy after surgery should be based on clinical judgment of adequate wound healing.

Posterior reversible encephalopathy syndrome

In clinical studies with axitinib, events of posterior reversible encephalopathy syndrome (PRES) were reported (see section 4.8).

PRES is a neurological disorder which can present with headache, seizure, lethargy, confusion, blindness and other visual and neurologic disturbances. Mild to severe hypertension may be present. Magnetic resonance imaging is necessary to confirm the diagnosis of PRES. In patients with signs or symptoms of PRES, temporarily interrupt or permanently discontinue axitinib treatment. The safety of reinitiating axitinib therapy in patients previously experiencing PRES is not known.

Proteinuria

In clinical studies with axitinib, proteinuria, including that of Grade 3 severity, was reported (see section 4.8).

Monitoring for proteinuria before initiation of, and periodically throughout, treatment with axitinib is recommended. For patients who develop moderate to severe proteinuria, reduce the dose or temporarily interrupt axitinib treatment (see section 4.2).

Liver-related adverse events

In a controlled clinical study with axitinib for the treatment of patients with RCC, liver-related events were reported. The most commonly reported liver-related adverse reactions included increases in alanine aminotransferase (ALT), aspartate aminotransferase (AST), and blood bilirubin (see section 4.8). No concurrent elevations of ALT (> 3 times the upper limit of normal [ULN]) and bilirubin (> 2 times the ULN) were observed.

In a clinical dose-finding study, concurrent elevations of ALT (12 times the ULN) and bilirubin (2.3 times the ULN), considered to be drug-related hepatotoxicity, were observed in 1 patient who received axitinib at a starting dose of 20 mg twice daily (4 times the recommended starting dose).

Liver function tests should be monitored before initiation of, and periodically throughout, treatment with axitinib.

Hepatic impairment

In clinical studies with axitinib, the systemic exposure to axitinib was approximately two-fold higher in subjects with moderate hepatic impairment (Child-Pugh class B) compared to subjects with normal hepatic function. A dose decrease is recommended when administering axitinib to patients with moderate hepatic impairment (Child-Pugh class B) (see section 4.2).

Axitinib has not been studied in patients with severe hepatic impairment (Child-Pugh class C) and should not be used in this population.

Elderly patients (≥ 65 years) and race

In a controlled clinical study with axitinib for the treatment of patients with RCC, 34% of patients treated with axitinib were ≥ 65 years of age. The majority of patients were White (77%) or Asian (21%). Although greater sensitivity to develop adverse reactions in some older patients and Asian patients cannot be ruled out, overall, no major differences were observed in the safety and effectiveness of axitinib between patients who were ≥ 65 years of age and non-elderly, and between White patients and patients of other races.

No dosage adjustment is required on the basis of patient age or race (see sections 4.2 and 5.2).

Lactose

This medicinal product contains lactose. Patients with rare hereditary problems of galactose intolerance, Lapp lactase deficiency or glucose-galactose malabsorption should not take this medicinal product.

In vitro data indicate that axitinib is metabolised primarily by CYP3A4/5 and, to a lesser extent, CYP1A2, CYP2C19, and uridine diphosphate-glucuronosyltransferase (UGT) 1A1.

CYP3A4/5 inhibitors

Ketoconazole, a strong inhibitor of CYP3A4/5, administered at a dose of 400 mg once daily for 7 days, increased the mean area under the curve (AUC) 2-fold and C_max 1.5-fold of a single 5-mg oral dose of axitinib in healthy volunteers. Co-administration of axitinib with strong CYP3A4/5 inhibitors (e.g. ketoconazole, itraconazole, clarithromycin, erythromycin, atazanavir, indinavir, nefazodone, nelfinavir, ritonavir, saquinavir, and telithromycin) may increase axitinib plasma concentrations. Grapefruit may also increase axitinib plasma concentrations. Selection of concomitant medicinal products with no or minimal CYP3A4/5 inhibition potential is recommended. If a strong CYP3A4/5 inhibitor must be co-administered, a dose adjustment of axitinib is recommended (see section 4.2).

CYP1A2 and CYP2C19 inhibitors

CYP1A2 and CYP2C19 constitute minor (< 10%) pathways in axitinib metabolism. The effect of strong inhibitors of these isozymes on axitinib pharmacokinetics has not been studied. Caution should be exercised due to the risk of increased axitinib plasma concentrations in patients taking strong inhibitors of these isozymes.

CYP3A4/5 inducers

Rifampicin, a strong inducer of CYP3A4/5, administered at a dose of 600 mg once daily for 9 days, reduced the mean AUC by 79% and C_max by 71% of a single 5 mg dose of axitinib in healthy volunteers.

Co-administration of axitinib with strong CYP3A4/5 inducers (e.g. rifampicin, dexamethasone, phenytoin, carbamazepine, rifabutin, rifapentin, phenobarbital, and Hypericum perforatum [St. John's wort]) may decrease axitinib plasma concentrations. Selection of concomitant medicinal products with no or minimal CYP3A4/5 induction potential is recommended. If a strong CYP3A4/5 inducer must be co-administered, a dose adjustment of axitinib is recommended (see section 4.2).

CYP1A2 induction by smoking

CYP1A2 constitutes a minor (< 10%) pathway in axitinib metabolism. The effect of smoking-related CYP1A2 induction on axitinib pharmacokinetics has not been fully characterised. The risk of decreased axitinib plasma concentrations should be considered when administering axitinib to smokers.

In vitro studies of CYP and UGT inhibition and induction

In vitro studies indicated that axitinib does not inhibit CYP2A6, CYP2C9, CYP2C19, CYP2D6, CYP2E1, CYP3A4/5, or UGT1A1 at therapeutic plasma concentrations.

In vitro studies indicated that axitinib has a potential to inhibit CYP1A2. Therefore, co-administration of axitinib with CYP1A2 substrates may result in increased plasma concentrations of CYP1A2 substrates (e.g. theophylline).

In vitro studies also indicated that axitinib has the potential to inhibit CYP2C8. However, co-administration of axitinib with paclitaxel, a known CYP2C8 substrate, did not result in increased plasma concentrations of paclitaxel in patients with advanced cancer, indicating lack of clinical CYP2C8 inhibition.

In vitro studies in human hepatocytes also indicated that axitinib does not induce CYP1A1, CYP1A2, or CYP3A4/5. Therefore co-administration of axitinib is not expected to reduce the plasma concentration of co-administered CYP1A1, CYP1A2, or CYP3A4/5 substrates in vivo.

In vitro studies with P-glycoprotein

In vitro studies indicated that axitinib inhibits P-glycoprotein. However, axitinib is not expected to inhibit P-glycoprotein at therapeutic plasma concentrations. Therefore, co-administration of axitinib is not expected to increase the plasma concentration of digoxin, or other P-glycoprotein substrates, in vivo.

Pregnancy

There are no data regarding the use of axitinib in pregnant women. Based on the pharmacological properties of axitinib, it may cause foetal harm when administered to a pregnant woman. Studies in animals have shown reproductive toxicity including malformations (see section 5.3). Axitinib should not be used during pregnancy unless the clinical condition of the woman requires treatment with this medicinal product.

Women of childbearing potential must use effective contraception during and up to 1 week after treatment.

Breast-feeding

It is unknown whether axitinib is excreted in human milk. A risk to the suckling child cannot be excluded. Axitinib should not be used during breast-feeding.

Fertility

Based on non-clinical findings, axitinib has the potential to impair reproductive function and fertility in humans (see section 5.3).

No studies on the effects on the ability to drive and use machines have been performed. Patients should be advised that they may experience events such as dizziness and/or fatigue during treatment with axitinib.

Summary of the safety profile

The most important serious adverse reactions reported in patients receiving axitinib were arterial embolic and thrombotic events, venous embolic and thrombotic events, haemorrhage (including gastrointestinal haemorrhage, cerebral haemorrhage and haemoptysis), gastrointestinal perforation and fistula formation, hypertensive crisis, and posterior reversible encephalopathy syndrome. These risks, including appropriate action to be taken, are discussed in section 4.4.

The most common (≥ 20%) adverse reactions observed following treatment with axitinib were diarrhoea, hypertension, fatigue, dysphonia, nausea, decreased appetite, and palmar-plantar erythrodysaesthesia (hand-foot) syndrome.

Tabulated list of adverse reactions

Table 1 presents adverse reactions reported in patients who received axitinib in a pivotal clinical study for the treatment of patients with RCC (see section 5.1).

The adverse reactions are listed by system organ class, frequency category and grade of severity. Frequency categories are defined as: very common (≥ 1/10), common (≥ 1/100 to < 1/10), uncommon (≥ 1/1,000 to < 1/100), rare (≥ 1/10,000 to < 1/1,000), very rare (< 1/10,000), and not known (cannot be estimated from the available data). The current safety database for axitinib is too small to detect rare and very rare adverse reactions (< 1/1,000).

Categories have been assigned based on absolute frequencies in the clinical study data. Within each system organ class, adverse reactions with the same frequency are presented in order of decreasing seriousness.

Table 1. Adverse reactions reported in the RCC study in patients who received axitinib (N= 359)

^a National Cancer Institute Common Terminology Criteria for Adverse Events, Version 3.0

^b See Description of selected adverse reactions section

^c Fatal (Grade 5) cases were reported

^d Adverse reaction is all-causality incidence

^e Including acute renal failure

Description of selected adverse reactions

Thyroid dysfunction (see section 4.4)

In a controlled clinical study with axitinib for the treatment of patients with RCC, hypothyroidism was reported in 18.4% of patients and hyperthyroidism was reported in 0.6% of patients. Thyroid stimulating hormone (TSH) increased was reported as an adverse reaction in 4.5% of patients receiving axitinib. During routine laboratory assessments, in patients who had TSH < 5 μU/ml before treatment, elevations of TSH to ≥ 10 μU/ml occurred in 32.2% of patients receiving axitinib.

Venous embolic and thrombotic events (see section 4.4)

In a controlled clinical study with axitinib for the treatment of patients with RCC, venous embolic and thrombotic adverse reactions were reported in 1.9% of patients receiving axitinib. Grade 3/4 venous embolic and thrombotic adverse reactions were reported in 1.7% of patients receiving axitinib (including pulmonary embolism, deep vein thrombosis, and retinal vein occlusion/thrombosis). Fatal pulmonary embolism was reported in one patient (0.3%) receiving axitinib.

Arterial embolic and thrombotic events (see section 4.4)

In a controlled clinical study with axitinib for the treatment of patients with RCC, Grade 3/4 arterial embolic and thrombotic adverse reactions were reported in 1.1% of patients receiving axitinib. The most frequent arterial embolic and thrombotic event was transient ischemic attack (0.8%). A fatal cerebrovascular accident was reported in one patient (0.3%) receiving axitinib. In monotherapy studies with axitinib (N=699), arterial embolic and thrombotic adverse reactions (including transient ischemic attack, myocardial infarction, and cerebrovascular accident) were reported in 1.0% of patients receiving axitinib.

Polycythaemia (see Elevation of haemoglobin or haematocrit in section 4.4)

In a controlled clinical study with axitinib for the treatment of patients with RCC, polycythaemia was reported as an adverse reaction in 0.3% of patients receiving axitinib. Routine laboratory assessments detected elevated haemoglobin above ULN in 9.7% of patients receiving axitinib. In four clinical studies with axitinib for the treatment of patients with RCC (N=537), elevated haemoglobin above ULN was observed in 13.6% receiving axitinib.

Haemorrhage (see section 4.4)

In a controlled clinical study with axitinib for the treatment of patients with RCC that excluded patients with untreated brain metastasis, haemorrhagic adverse reactions were reported in 10.6% of patients receiving axitinib. The most common haemorrhagic adverse reactions in patients treated with axitinib were epistaxis (5.3%), haematuria (1.4%), rectal haemorrhage (1.1%) and gingival bleeding (1.1%). Grade > 3 haemorrhagic adverse reactions were reported in 0.8% of patients receiving axitinib (including cerebral haemorrhage, gastric haemorrhage and lower gastrointestinal haemorrhage). Fatal haemorrhage was reported in one patient (0.3%) receiving axitinib (gastric haemorrhage). In monotherapy studies with axitinib (N=699), haemoptysis was reported as an adverse reaction in 1.6% of patients, including one case (0.1%) of a Grade > 3 event.

Gastrointestinal perforation and fistula formation (see section 4.4)

In a controlled clinical study with axitinib for the treatment of patients with RCC, gastrointestinal perforation was reported in one patient (0.3%, all-causality incidence) receiving axitinib. In monotherapy studies with axitinib (N=699), fistulas were reported in 0.7% of patients (all-causality incidence) and fatal gastrointestinal perforation was reported in one patient (0.1%).

There is no specific treatment for axitinib overdose.

In a controlled clinical study with axitinib for the treatment of patients with RCC, one patient inadvertently received a dose of 20 mg twice daily for 4 days and experienced dizziness (Grade 1).

In a clinical dose finding study with axitinib, subjects who received starting doses of 10 mg twice daily or 20 mg twice daily experienced adverse reactions which included hypertension, seizures associated with hypertension, and fatal haemoptysis.

In cases of suspected overdose, axitinib should be withheld and supportive care instituted.

Pharmacotherapeutic group:Antineoplastic agents, protein kinase inhibitors, ATC code: L01XE17

Mechanism of action

Axitinib is a potent and selective tyrosine kinase inhibitor of vascular endothelial growth factor receptors (VEGFR)-1, VEGFR-2 and VEGFR-3. These receptors are implicated in pathologic angiogenesis, tumour growth, and metastatic progression of cancer. Axitinib has been shown to potently inhibit VEGF-mediated endothelial cell proliferation and survival. Axitinib inhibited the phosphorylation of VEGFR-2 in xenograft tumour vasculature that expressed the target in vivo and produced tumour growth delay, regression, and inhibition of metastases in many experimental models of cancer.

Effect on QTc interval

In a randomised, 2-way crossover study, 35 healthy subjects were administered a single oral dose of axitinib (5 mg) in the absence and presence of 400 mg ketoconazole for 7 days. Results of this study indicated that axitinib plasma exposures up to two-fold greater than therapeutic levels expected following a 5 mg dose, did not produce clinically-significant QT interval prolongation.

Clinical efficacy

The safety and efficacy of axitinib were evaluated in a randomised, open-label, multicenter Phase 3 study. Patients (N=723) with advanced RCC whose disease had progressed on or after treatment with one prior systemic therapy, including sunitinib-, bevacizumab-, temsirolimus-, or cytokine-containing regimens were randomised (1:1) to receive axitinib (n=361) or sorafenib (n=362). The primary endpoint, progression-free survival (PFS), was assessed using a blinded independent central review. Secondary endpoints included objective response rate (ORR) and overall survival (OS).

Of the patients enrolled in this study, 389 patients (53.8%) had received one prior sunitinib-based therapy, 251 patients (34.7%) had received one prior cytokine-based therapy (interleukin-2 or interferon-alpha), 59 patients (8.2%) had received one prior bevacizumab-based therapy, and 24 patients (3.3%) had received one prior temsirolimus-based therapy. The baseline demographic and disease characteristics were similar between the axitinib and sorafenib groups with regard to age, gender, race, Eastern Cooperative Oncology Group (ECOG) performance status, geographic region, and prior treatment.

In the overall patient population and the two main subgroups (prior sunitinib treatment and prior cytokine treatment), there was a statistically significant advantage for axitinib over sorafenib for the primary endpoint of PFS (see Table 2 and Figures 1, 2 and 3). The magnitude of median PFS effect was different in the subgroups by prior therapy. Two of the subgroups were too small to give reliable results (prior temsirolimus treatment or prior bevacizumab treatment). There were no statistically significant differences between the arms in OS in the overall population or in the subgroups by prior therapy.

Table 2. Efficacy results

CI=Confidence interval, HR=Hazard ratio (axitinib/sorafenib); ITT: Intent-to-treat; NE: not estimable; NS: not statistically significant; ORR: Objective response rate; OS: Overall survival; PFS: Progression-free survival.

^a Time from randomization to progression or death due to any cause, whichever occurs first. Cutoff date: 03 June 2011.

^b Assessed by independent radiology review according to RECIST.

^c One-sided p-value from a log-rank test of treatment stratified by ECOG performance status and prior therapy.

^d Cutoff date: 01 November 2011.

^e Cutoff date: 31 August 2010.

^f Risk ratio is used for ORR. A risk ratio > 1 indicated a higher likelihood of responding in the axitinib arm; a risk ratio < 1 indicated a higher likelihood of responding in the sorafenib arm.

^g One-sided p-value from Cochran-Mantel-Haenszel test of treatment stratified by ECOG performance status and prior therapy.

^h One-sided p-value from a log-rank test of treatment stratified by ECOG performance status.

ⁱ One-sided p-value from Cochran-Mantel-Haenszel test of treatment stratified by ECOG performance status.

Figure 1. Kaplan-Meier curve of progression-free survival by independent assessment for the overall population

Figure 2. Kaplan-Meier curve of progression-free survival by independent assessment for the prior sunitinib subgroup

Figure 3. Kaplan-Meier curve of progression-free survival by independent assessment for the prior cytokine subgroup

Paediatric population

The European Medicines Agency has waived the obligation to submit the results of studies with axitinib in all subsets of the paediatric population for treatment of kidney and renal pelvis carcinoma (excluding nephroblastoma, nephroblastomatosis, clear cell sarcoma, mesoblastic nephroma, renal medullary carcinoma and rhabdoid tumour of the kidney) (see section 4.2 for information on paediatric use).

After oral administration of axitinib tablets, the mean absolute bioavailability is 58% compared to intravenous administration. The plasma half life of axitinib ranges from 2.5 to 6.1 hours. Dosing of axitinib at 5 mg twice daily resulted in less than two-fold accumulation compared to administration of a single dose. Based on the short half-life of axitinib, steady state is expected within 2 to 3 days of the initial dose.

Absorption and distribution

Peak axitinib concentrations in plasma are generally reached within 4 hours following oral administration of axitinib with median T_max ranging from 2.5 to 4.1 hours. Administration of axitinib with a moderate fat meal resulted in 10% lower exposure compared to overnight fasting. A high fat, high-calorie meal resulted in 19% higher exposure compared to overnight fasting. Axitinib may be administered with or without food (see section 4.2).

The average C_max and AUC increased proportionally over an axitinib dosing range of 5 to 10 mg. In vitro binding of axitinib to human plasma proteins is > 99% with preferential binding to albumin and moderate binding to α₁-acid glycoprotein. At the 5 mg twice daily dose in the fed state, the geometric mean peak plasma concentration and 24-hour AUC were 27.8 ng/ml and 265 ng.h/ml, respectively, in patients with advanced RCC. The geometric mean oral clearance and apparent volume of distribution were 38 L/h and 160 L, respectively.

Biotransformation and elimination

Axitinib is metabolised primarily in the liver by CYP3A4/5 and to a lesser extent by CYP1A2, CYP2C19, and UGT1A1.

Following oral administration of a 5 mg radioactive dose of axitinib, 30-60% of the radioactivity was recovered in faeces and 23% of the radioactivity was recovered in urine. Unchanged axitinib, accounting for 12% of the dose, was the major component identified in faeces. Unchanged axitinib was not detected in urine; the carboxylic acid and sulfoxide metabolites accounted for the majority of radioactivity in urine. In plasma, the N-glucuronide metabolite represented the predominant radioactive component (50% of circulating radioactivity) and unchanged axitinib and the sulfoxide metabolite each accounted for approximately 20% of the circulating radioactivity.

The sulfoxide and N-glucuronide metabolites show approximately 400-fold and 8000-fold less in vitro potency, respectively, against VEGFR-2 compared to axitinib.

Special populations

Elderly patients, gender, and race

Population pharmacokinetic analyses in patients with advanced cancer (including advanced RCC) and healthy volunteers indicate that there are no clinically relevant effects of age, gender, body weight, race, renal function, UGT1A1 genotype, or CYP2C19 genotype.

Paediatric population

Axitinib has not been studied in patients < 18 years of age.

Hepatic impairment

In vitro and in vivo data indicate that axitinib is primarily metabolised by the liver.

Compared to subjects with normal hepatic function, systemic exposure following a single dose of axitinib was similar in subjects with mild hepatic impairment (Child-Pugh class A) and higher (approximately two-fold) in subjects with moderate hepatic impairment (Child-Pugh class B). Axitinib has not been studied in subjects with severe hepatic impairment (Child-Pugh class C) and should not be used in this population (see section 4.2 for dose adjustment recommendations).

Renal impairment

Unchanged axitinib is not detected in the urine.

Axitinib has not been studied in subjects with renal impairment. In clinical studies with axitinib for the treatment of patients with RCC, patients with serum creatinine > 1.5 times the ULN or calculated creatinine clearance < 60 ml/min were excluded. Population pharmacokinetic analyses have shown that axitinib clearance was not altered in subjects with renal impairment and no dose adjustment of axitinib is required.

Repeat dose toxicity

Major toxicity findings in mice and dogs following repeated dosing for up to 9 months were the gastrointestinal, haematopoietic, reproductive, skeletal and dental systems, with No Observed Adverse Effect Levels (NOAEL) approximately equivalent to or below expected human exposure at the recommended clinical starting dose (based on AUC levels).

Carcinogenicity

Carcinogenicity studies have not been performed with axitinib.

Genotoxicity

Axitinib was not mutagenic or clastogenic in conventional genotoxicity assays in vitro. A significant increase in polyploidy was observed in vitro at concentrations > 0.22 µg/ml, and an elevation in micronucleated polychromatic erythrocytes was observed in vivo with No Observed Effect Level (NOEL) 69-fold the expected human exposure. Genotoxicity findings are not considered clinically relevant at exposure levels observed in humans.

Reproduction toxicity

Axitinib-related findings in the testes and epididymis included decreased organ weight, atrophy or degeneration, decreased numbers of germinal cells, hypospermia or abnormal sperm forms, and reduced sperm density and count. These findings were observed in mice at exposure levels approximately 12-fold the expected human exposure, and in dogs at exposure levels below the expected human exposure. There was no effect on mating or fertility in male mice at exposure levels approximately 57-fold the expected human exposure. Findings in females included signs of delayed sexual maturity, reduced or absent corpora lutea, decreased uterine weights and uterine atrophy at exposures approximately equivalent to the expected human exposure. Reduced fertility and embryonic viability were observed in female mice at all doses tested, with exposure levels at the lowest dose approximately 10-fold the expected human exposure.

Pregnant mice exposed to axitinib showed an increased occurrence of cleft palate malformations and skeletal variations, including delayed ossification, at exposure levels below the expected human exposure. Perinatal and postnatal developmental toxicity studies have not been conducted.

Toxicity findings in immature animals

Reversible physeal dysplasia was observed in mice and dogs given axitinib for at least 1 month at exposure levels approximately six-fold higher than the expected human exposure. Partially reversible dental caries were observed in mice treated for more than 1 month at exposure levels similar to the expected human exposure. Other toxicities of potential concern to paediatric patients have not been evaluated in juvenile animals.

Core:

Microcrystalline cellulose

Lactose monohydrate

Croscarmellose sodium

Magnesium stearate

Film-coating:

Hypromellose

Titanium dioxide (E171)

Lactose monohydrate

Triacetin (E1518)

Iron oxide red (E172)

Not applicable.

3 years

This medicinal product does not require any special storage conditions.

1 mg film-coated tablets

5 mg film-coated tablets

Aluminium/aluminium blister. Each pack contains 28 or 56 tablets.

1 mg film-coated tablets

HDPE bottle with a silica gel desiccant and a polypropylene closure containing 180 tablets.

5 mg film-coated tablets

HDPE bottle with a silica gel desiccant and a polypropylene closure containing 60 tablets.

Not all pack sizes may be marketed.

Any unused medicinal product or waste material should be disposed of in accordance with local requirements.

Pfizer Limited

Ramsgate Road

Sandwich, Kent CT13 9NJ

United Kingdom

EU/1/12/777/001

EU/1/12/777/002

EU/1/12/777/003

EU/1/12/777/004

EU/1/12/777/005

EU/1/12/777/006

Date of first authorisation: 3 September 2012

POM

Ref: IL 1_1

Detailed information on this medicinal product is available on the website of the European Medicines Agency http://www.ema.europa.eu.