Rozlytrek as monotherapy is indicated for the treatment of adult and paediatric patients 12 years of age and older with solid tumours expressing a neurotrophic tyrosine receptor kinase (NTRK) gene fusion,

• who have a disease that is locally advanced, metastatic or where surgical resection is likely to result in severe morbidity, and

• who have not received a prior NTRK inhibitor

• who have no satisfactory treatment options (see sections 4.4 and 5.1).

Rozlytrek as monotherapy is indicated for the treatment of adult patients with ROS1‑positive, advanced non‑small cell lung cancer (NSCLC) not previously treated with ROS1 inhibitors.

Treatment with Rozlytrek should be initiated by a physician experienced in the use of anticancer medicinal products.

Patient selection

NTRK gene fusion‑positive solid tumours

A validated assay is required for the selection of patients with NTRK gene fusion‑positive solid tumours. NTRK gene fusion‑positive status must be established prior to initiation of Rozlytrek therapy (see section 5.1).

ROS1‑positive non‑small cell lung cancer

A validated assay is required for the selection of patients with ROS1‑positive NSCLC. ROS1‑positive status must be established prior to initiation of Rozlytrek therapy (see section 5.1).

Posology

Adults

The recommended dose for adults is 600 mg entrectinib once daily.

Paediatric population

The recommended dose for paediatric patients 12 years of age and older is 300 mg/m² body surface area (BSA) entrectinib once daily (see Table 1).

Table 1: Recommended dosing for paediatric patients

Duration of treatment

It is recommended that patients are treated with Rozlytrek until disease progression or unacceptable toxicity.

Delayed or missed doses

If a planned dose of Rozlytrek is missed, patients can make up that dose unless the next dose is due within 12 hours. If vomiting occurs immediately after taking a dose of Rozlytrek, patients may repeat that dose.

Dose modifications

Management of adverse reactions may require temporary interruption, dose reduction, or discontinuation of treatment with Rozlytrek, in case of specified adverse reactions (see Table 4) or based on the prescriber's assessment of the patient's safety or tolerability.

Adults

For adults, the dose of Rozlytrek may be reduced up to 2 times, based on tolerability (see Table 2). Rozlytrek treatment should be permanently discontinued if patients are unable to tolerate a dose of 200 mg once daily.

Table 2: Dose reduction schedule for adult patients

Paediatric population

For paediatric patients 12 years of age and older, the dose of Rozlytrek may be reduced up to 2 times, based on tolerability (see Table 3).

For some patients an intermittent dosing schedule is required to achieve the recommended reduced total weekly paediatric dose. Rozlytrek treatment should be permanently discontinued if patients are unable to tolerate the lowest reduced dose.

Table 3: Dose reduction schedule for paediatric patients

Recommendations for Rozlytrek dose modifications for adult and paediatric patients in case of specific adverse reactions are provided in Table 4 (see sections 4.4 and 4.8).

Table 4: Recommended Rozlytrek dose modifications for adverse reactions in adult and paediatric patients

Strong or moderate CYP3A inhibitors

The concomitant use of strong or moderate CYP3A inhibitors in adults and paediatric patients 12 years and older, should be avoided (see section 4.4).

For adults, if coadministration is unavoidable, the use of strong or moderate CYP3A inhibitors with Rozlytrek should be limited to 14 days and the Rozlytrek dose should be reduced as follows:

• 100 mg once daily for use with strong CYP3A inhibitors (see section 4.5)

• 200 mg once daily for use with moderate CYP3A inhibitors.

After discontinuation of the concomitant strong or moderate CYP3A inhibitors, the Rozlytrek dose that was taken prior to initiating the strong or moderate CYP3A inhibitor can be resumed. A wash‑out period may be required for CYP3A4 inhibitors with a long half‑life (see section 4.5).

Special populations

Elderly

No dose adjustment is required in patients ≥ 65 years of age (see section 5.2).

Hepatic impairment

No dose adjustment is recommended for patients with mild (Child-Pugh A), moderate (Child-Pugh B) or severe (Child-Pugh C) hepatic impairment (see section 5.2). Patients with severe hepatic impairment should be carefully monitored for hepatic function and adverse reactions (see Table 4).

Renal impairment

No dose adjustment is required in patients with mild or moderate renal impairment. Entrectinib has not been studied in patients with severe renal impairment (see section 5.2).

Paediatric population

The safety and efficacy of entrectinib in children below 12 years of age have not been established. Currently available data are described in sections 4.8, 5.1 and 5.2, but no recommendation on a posology can be made.

Method of administration

Rozlytrek is for oral use. The hard capsules should be swallowed whole and must not be opened or dissolved since the contents of the capsule are very bitter. Rozlytrek can be taken with or without food (see section 5.2) but should not be taken with grapefruit or grapefruit juice (see section 4.5).

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

Efficacy across tumour types

The benefit of Rozlytrek has been established in single‑arm trials encompassing a relatively small sample of patients whose tumours exhibit NTRK gene fusions. Favourable effects of Rozlytrek have been shown based on overall response rate and response duration in a limited number of tumour types. The effect may be quantitatively different depending on tumour type, as well as on concomitant genomic alterations (see section 5.1). For these reasons, Rozlytrek should only be used if there are no satisfactory treatment options (i.e., for which clinical benefit has not been established, or where such treatment options have been exhausted).

Cognitive disorders

Cognitive disorders, including confusion, mental status changes, memory impairment, and hallucinations, were reported in clinical trials with Rozlytrek (see section 4.8). Patients over the age of 65 years experienced a higher incidence of these events than younger patients. Patients should be monitored for signs of cognitive changes.

Based on the severity of cognitive disorders, Rozlytrek treatment should be modified as described in Table 4 in section 4.2.

Patients should be counselled on the potential for cognitive changes with Rozlytrek treatment. Patients should be instructed not to drive or use machines until symptoms resolve if they experience cognitive disorders (see section 4.7).

Fractures

Fractures have been reported in 29.7% (27/91) paediatric patients treated with Rozlytrek in clinical trials (see section 4.8). Bone fractures mostly occurred in paediatric patients less than 12 years of age and were localised in the lower extremity (with a predilection for femur, tibia, foot and fibula). In both adult and paediatric patients, some fractures occurred in the setting of a fall or other trauma to the affected area. Fourteen paediatric patients had more than one occurrence of a fracture and 5 paediatric patients had Rozlytrek treatment interrupted due to a fracture. Fractures resolved in the majority of paediatric patients (see section 4.8). Six paediatric patients discontinued treatment due to fractures.

Patients with signs or symptoms of fractures (e.g., pain, abnormal gait, changes in mobility, deformity) should be evaluated promptly.

Hyperuricemia

Hyperuricemia has been observed in patients treated with entrectinib. Serum uric acid levels should be assessed prior to initiating Rozlytrek and periodically during treatment. Patients should be monitored for signs and symptoms of hyperuricemia. Treatment with urate‑lowering medicinal products should be initiated as clinically indicated and Rozlytrek withheld for signs and symptoms of hyperuricemia. Rozlytrek dose should be modified based on severity as described in Table 4 in section 4.2.

Congestive heart failure

Congestive heart failure (CHF) has been reported in 5.4% of patients across clinical trials with Rozlytrek (see section 4.8). These reactions were observed in patients with or without a history of cardiac disease and resolved in 61.7% of those patients upon institution of appropriate clinical management and/or Rozlytrek dose reduction/interruption.

For patients with symptoms or known risk factors of CHF, left ventricular ejection fraction (LVEF) should be assessed prior to initiation of Rozlytrek treatment. Patients receiving Rozlytrek should be carefully monitored and those with clinical signs and symptoms of CHF, including shortness of breath or oedema, should be evaluated and treated as clinically appropriate.

Based on the severity of CHF, Rozlytrek treatment should be modified as described in Table 4 in section 4.2.

QTc interval prolongation

QTc interval prolongation has been observed in patients treated with Rozlytrek in clinical trials (see section 4.8).

Use of Rozlytrek should be avoided in patients with a baseline QTc interval longer than 450 ms, in patients with congenital long QTc syndrome, and in patients taking medicinal products that are known to prolong the QTc interval.

Rozlytrek should be avoided in patients with electrolyte imbalances or significant cardiac disease, including recent myocardial infarction, congestive heart failure, unstable angina, and bradyarrhythmias. If in the opinion of the treating physician, the potential benefits of Rozlytrek in a patient with any of these conditions outweigh the potential risks, additional monitoring should be performed and a specialist consultation should be considered.

Assessment of ECG and electrolytes at baseline and after 1 month of treatment with Rozlytrek are recommended. Periodic monitoring of ECGs and electrolytes as clinically indicated throughout Rozlytrek treatment, are also recommended.

Based on the severity of QTc prolongation, Rozlytrek treatment should be modified as described in Table 4 in section 4.2.

Women of childbearing potential

Rozlytrek may cause foetal harm when administered to a pregnant woman. Women of childbearing potential must use highly effective contraception methods during treatment and up to 5 weeks after the last dose of Rozlytrek.

Male patients with female partners of childbearing potential must use highly effective contraceptive methods during treatment with Rozlytrek and for 3 months after the last dose (see sections 4.6 and 5.3).

Drug interactions

Co‑administration of Rozlytrek with a strong or moderate CYP3A inhibitor increases entrectinib plasma concentrations (see section 4.5), which could increase the frequency or severity of adverse reactions. In adult and paediatric patients 12 years and older, co‑administration of Rozlytrek with a strong or moderate CYP3A inhibitor should be avoided. For adult patients, if co‑administration is unavoidable, the Rozlytrek dose should be reduced (see section 4.2).

During treatment with Rozlytrek, the consumption of grapefruit and grapefruit products should be avoided.

Co‑administration of Rozlytrek with a strong or moderate CYP3A or P‑gp inducer decreases entrectinib plasma concentrations (see section 4.5), which may reduce efficacy of Rozlytrek, and should be avoided.

Lactose intolerance

Rozlytrek contains lactose. Patients with rare hereditary problems of galactose intolerance, total lactase deficiency or glucose‑galactose malabsorption should not take this medicinal product.

Sunset yellow FCF (E110)

Rozlytrek 200 mg hard capsules contain sunset yellow FCF (E110), which may cause allergic reactions.

Effects of entrectinib on other medicinal products

Effect of entrectinib on CYP substrates

Entrectinib is a weak inhibitor of CYP3A4. Co‑administration of entrectinib 600 mg once daily with oral midazolam (a sensitive CYP3A substrate) in patients increased the midazolam AUC by 50% but reduced midazolam C_max by 21%. Caution is advised when entrectinib is administered together with sensitive CYP3A4 substrates with a narrow therapeutic range (e.g., cisapride, cyclosporin, ergotamine, fentanyl, pimozide, quinidine, tacrolimus, alfentanil and sirolimus), due to the increased risk of adverse drug reactions.

Effect of entrectinib on P‑gp substrates

In vitro data suggest that entrectinib has inhibitory potential towards P‑glycoprotein (P‑gp).

Co‑administration of a single 600 mg dose of entrectinib with digoxin (a sensitive P‑gp substrate) increased digoxin C_max by 28% and AUC by 18%. The renal clearance of digoxin was similar between treatments of digoxin alone and digoxin co‑administered with entrectinib, indicating minimal effect of entrectinib on renal clearance of digoxin.

The effect of entrectinib on digoxin absorption is not considered clinically relevant, but it is unknown whether the effect of entrectinib may be larger on more sensitive oral P‑gp substrates such as dabigatran etexilate.

Effect of entrectinib on BCRP substrates

Inhibition of BCRP was observed in in vitro studies.

The clinical relevance of this inhibition is unknown, but caution is advised when sensitive oral BCRP substrates (e.g. methotrexate, mitoxantrone, topotecan, lapatinib) are co‑administered with entrectinib, due to the risk of increased absorption.

Effect of entrectinib on other transporter substrates

In vitro data indicate that entrectinib has weak inhibitory potential towards organic anion‑transporting polypeptide (OATP)1B1. The clinical relevance of this inhibition is unknown, but caution is advised when sensitive oral OATP1B1 substrates (e.g. atorvastatin, pravastatin, rosuvastatin repaglinide, bosentan) are co‑administered with entrectinib, due to the risk of increased absorption.

Effect of entrectinib on substrates of PXR regulated enzymes

In vitro studies indicate that entrectinib may induce pregnane X receptor (PXR) regulated enzymes (e.g. CYP2C family and UGT). Co‑administration of entrectinib with CYP2C8, CYP2C9 or CYP2C19 substrates (e.g. repaglinide, warfarin, tolbutamide or omeprazole) may decrease their exposure.

Oral contraceptives

It is currently unknown whether entrectinib may reduce the effectiveness of systemically acting hormonal contraceptives. Therefore, women using systemically acting hormonal contraceptives are advised to add a barrier method (see section 4.6).

Effects of other medicinal products on entrectinib

Based on in vitro data, CYP3A4 is the predominant enzyme mediating the metabolism of entrectinib and formation of its major active metabolite M5.

Effect of CYP3A or P‑gp inducers on entrectinib

Co‑administration of multiple oral doses of rifampin, a strong CYP3A inducer, with a single oral dose of entrectinib reduced entrectinib AUC_inf by 77% and C_max by 56%.

Co‑administration of entrectinib with CYP3A/P‑gp inducers (including, but not limited to, carbamazepine, phenobarbital, phenytoin, rifabutin, rifampicin, St. John's Wort ‑Hypericum perforatum‑, apalutamide, ritonavir) should be avoided.

Effect of CYP3A or P‑gp inhibitors on entrectinib

Co‑administration of itraconazole, a strong CYP3A4 inhibitor, with a single oral dose of entrectinib increased AUC_inf by 600% and C_max by 173%.

Co‑administration of strong and moderate CYP3A inhibitors (including, but not limited to, ritonavir, saquinavir, ketoconazole, itraconazole, voriconazole, posaconazole, grapefruit or Seville oranges) should be avoided. If concurrent use of strong or moderate inhibitors of CYP3A4 is unavoidable, dose adjustment of entrectinib is required (see section 4.2).

Although, a marked effect of inhibitory P‑gp medicinal products on entrectinib pharmacokinetics is not expected, caution is advised when treatment with strong or moderate P‑gp inhibitors (e.g. verapamil, nifedipine, felodipine, fluvoxamine, paroxetine) are co‑administered with entrectinib due to risk of increased entrectinib exposure (see section 5.2).

Effect of medicinal products that increase gastric pH on entrectinib

Co‑administration of a proton pump inhibitor (PPI), lansoprazole with a single 600 mg entrectinib dose reduced entrectinib AUC by 25% and C_max by 23%.

No dose adjustments are required when entrectinib is co‑administered with PPIs or other drugs that raise gastric pH (e.g., H2 receptor antagonists or antacids).

Women of childbearing potential / Contraception in males and females

Female patients of childbearing potential should have medically supervised pregnancy testing prior to initiating Rozlytrek therapy.

Female patients of childbearing potential must use highly effective contraceptive methods during treatment and for at least 5 weeks following the last dose of Rozlytrek.

It is currently unknown whether entrectinib may reduce the effectiveness of systemically acting hormonal contraceptives (see section 4.5). Therefore, women using systemically acting hormonal contraceptives should be advised to add a barrier method.

Male patients with female partners of childbearing potential must use highly effective contraceptive methods during treatment and for at least 3 months following the last dose of Rozlytrek (see section 5.3).

Pregnancy

There are no available data from the use of entrectinib in pregnant women. Based on animal studies and its mechanism of action, entrectinib may cause foetal harm when administered to a pregnant woman (see sections 4.4 and 5.3).

Rozlytrek is not recommended during pregnancy and in women of childbearing potential not using contraception.

Female patients receiving Rozlytrek should be advised of the potential harm to the foetus. Female patients should be advised to contact the doctor, should pregnancy occur.

Breast‑feeding

It is unknown whether entrectinib or its metabolites are excreted in human milk.

A risk to the breast‑fed children cannot be excluded.

Breast‑feeding should be discontinued during treatment with Rozlytrek.

Fertility

No fertility studies in animals have been performed to evaluate the effect of entrectinib (see section 5.3).

Rozlytrek has moderate influence on the ability to drive and use machines. Patients should be instructed not to drive or use machines until the symptoms resolve, if they experience cognitive adverse reactions, syncope, blurred vision, or dizziness, during treatment with Rozlytrek (see sections 4.4 and 4.8).

Summary of the safety profile

The most common adverse reactions (≥ 20%) were fatigue, constipation, diarrhoea, dizziness, dysgeusia, oedema, increased weight, anaemia, increased blood creatinine, nausea, dysaesthesia, pain, vomiting, dyspnoea, cognitive disorders, pyrexia, arthralgia, increased aspartate aminotransferase and cough. The most frequent serious adverse reactions (≥ 2%) were lung infection (5.3%), fractures (4.1%), dyspnoea (3.6%), cognitive impairment (2.9%), pleural effusion (2.5%) and pyrexia (2.5%). Permanent discontinuation due to an adverse reaction occurred in 6.0% of patients.

Tabulated list of adverse reactions

Tables 5 and 6 summarise the adverse drug reactions (ADRs) occurring in 762 adults and 91 paediatric patients treated with Rozlytrek in three clinical trials in adults (ALKA, STARTRK‑1, STARTRK‑2), one clinical trial in paediatric patients (STARTRK‑NG) and one clinical trial in adults and paediatric patients (TAPISTRY). The median duration of exposure was 8.6 months.

Adverse drug reactions are listed by MedDRA system organ class. The following categories of frequency have been used: very common ≥ 1/10, common (≥ 1/100 to <1/10), uncommon (≥ 1/1,000 to <1/100), rare (≥ 1/10,000 to <1/1000), very rare (<1/10,000). Within each system organ class, the adverse reactions are presented in order of decreasing frequency.

Table 5: Adverse drug reactions occurring in adult and paediatric patients treated with Rozlytrek in clinical trials (N=853)

Table 6: Adverse drug reactions occurring in paediatric patients treated with Rozlytrek in clinical trials

Description of selected adverse reactions

Cognitive disorders

A variety of cognitive symptoms was reported across clinical trials (section 4.4). These included events reported as cognitive disorders (6.4%), confusional state (6.2%), memory impairment (4.9%), disturbance in attention (4.1%), amnesia (2.3%), mental status changes (0.9%), hallucination (0.8%), delirium (0.8%), disorientation (0.5%), brain fog (0.4%), attention deficit hyperactivity disorder (0.2%), visual hallucination (0.2%), auditory hallucination (0.1%), mental impairment (0.1%) and mental disorder (0.1%). Grade 3 cognitive disorders were reported in 3.6% of patients. Adult patients who had CNS disease at baseline had a higher frequency of these adverse reactions (30.0%) compared to those without CNS disease (22.6%). The median time to onset for cognitive disorders was 0.95 months. In the paediatric population, 2.2% (2/91) of patients experienced disturbance in attention of Grade 1 severity and 2.2% (2/91) of patients experienced disturbance in attention of Grade 2 severity.

Fractures

Fractures were experienced by 9.1% (69/762) of adult patients and 29.7% (27/91) of paediatric patients. In general, there was inadequate assessment for tumour involvement at the site of fracture; however, radiologic abnormalities possibly indicative of tumour involvement were reported in some adult patients. In both adult and paediatric patients, most fractures were hip or other lower extremity fractures (e.g., femoral or tibial shaft) and some fractures occurred in the setting of a fall or other trauma.

The median time to fracture was 8.11 months (range: 0.26 months to 45.34 months) in adults. Rozlytrek was interrupted in 26.1% of adults that experienced fractures. Eighteen adult patients had Rozlytrek treatment interrupted and two adult patients discontinued Rozlytrek due to fractures.

A total of 52 fracture events were reported in 27 paediatric patients, with 14 patients who experienced more than one occurrence of fracture. In paediatric patients, fractures mostly occurred in patients less than 12 years of age. Fractures resolved in 85.2% (23/27) of paediatric patients. The median time to fracture was 4.3 months (range: 2.0 months to 28.65 months) in paediatric patients. Rozlytrek was interrupted in 18.5% (5/27) of paediatric patients who experienced fractures. Six paediatric patients discontinued Rozlytrek due to fractures. Twelve patients experienced Grade 2 fractures and 10 patients experienced Grade 3 fractures. Seven of the Grade 3 fractures were serious. There were no reports of tumour involvement at the site of the fracture.

Ataxia

Ataxia (including events of ataxia, balance disorder, and gait disturbances) was reported in 15.1% of patients. The median time to onset for ataxia was 0.5 months (range: 0.03 months to 65.48 months) and the median duration was 0.7 months (range: 0.03 months to 11.99 months). The majority of patients (55.8%) recovered from ataxia. Ataxia related adverse reactions were observed more frequently in elderly patients (24.2%) compared to patients below 65 years of age (11.8%).

Syncope

Syncope was reported in 5.0% of patients. In some patients, syncope was reported with concurrent hypotension, dehydration, or QTc prolongation and in other patients no other concurrent related conditions were reported.

QTc interval prolongation

Among the 853 patients who received entrectinib across clinical trials, 47 (7.2%) patients with at least one post‑baseline ECG assessment experienced QTcF interval prolongation of >60 ms after starting entrectinib, and 27 (4.1%) patients had a QTcF interval of >500 ms (section 4.4).

Peripheral sensory neuropathy

Peripheral sensory neuropathy was reported in 16.2% of patients. The median time to onset was 0.71 months (range 0.03 months to 81.97 months) and the median duration was 0.9 months (range: 0.07 months to 41 months). 48.6% of patients recovered from peripheral neuropathy.

Eye disorders

Eye disorders reported across clinical trials included vision blurred (9.0%), visual impairment (1.9%), and diplopia (1.8%). The median time to onset for eye disorders was 1.9 months (range: 0.03 months to 49.61 months). The median duration of eye disorders was 1.2 months (range 0.03 months to 14.98 months). 54% of patients recovered from the eye disorder adverse reactions.

Paediatric population

The overall safety profile of Rozlytrek in the paediatric population is similar to the safety profile in adults.

The safety of Rozlytrek in paediatric patients was established based on data from 91 paediatric patients across 3 clinical trials (STARTRK-NG, STARTRK-2, and TAPISTRY). Of these, 21 patients were 28 days to 23 months, 55 patients were 2 to 11 years old, 15 patients were 12 to <18 years old.

Adverse reactions and laboratory abnormalities of Grade 3 or 4 severity occurring more frequently (at least a 5% increased incidence) in paediatric patients compared to adult patients were neutropenia (19.8% vs. 4.5%), weight increased (18.7% vs 9.6%), bone fractures (11.0% vs 2.5%) and lung infection (11.0% vs 5.5%). No Grade 5 events were observed in the 91 patients in the paediatric safety population. Grade 3 to 4 events that occurred at a frequency ≥ 5% were neutropenia (19.8%), weight increased (18.7%), fractures (11%), lung infection (11%), and anaemia (8.8%).

The safety profile in each age group (infants and toddlers, children and adolescents) is similar to the overall safety profile of Rozlytrek in paediatric patients.

Elderly

Among the 853 patients who received entrectinib across clinical trials, 227 (26.6%) patients were 65 years or older and 53 (6.2%) were 75 years or older. The overall safety profile of entrectinib in the elderly patients is similar to the safety profile observed in patients younger than 65 years of age. Adverse reactions occurring more frequently (at least a 5% increased incidence) in the elderly compared to patients less than 65 years old were dizziness (44.9% vs 33.4%), blood creatinine increased (35.7% vs 30%), hypotension (19.8% vs 14.5%), and ataxia (24.2% vs 11.8%).

Reporting of suspected adverse reactions

Reporting suspected adverse reactions after authorisation of the medicinal product is important. It allows continued monitoring of the benefit/risk balance of the medicinal product. Healthcare professionals are asked to report any suspected adverse reactions via the Yellow Card Scheme Website: www.mhra.gov.uk/yellowcard or search for MHRA Yellow Card in the Google Play or Apple App Store.

Patients who experience overdose should be closely supervised and supportive care instituted. There are no known antidotes for entrectinib.

Pharmacotherapeutic group: antineoplastic agents, protein kinase inhibitors, ATC code: L01EX14

Mechanism of action

Entrectinib is an inhibitor of the tropomyosin receptor tyrosine kinases TRKA, TRKB and TRKC (encoded by the neurotrophic tyrosine receptor kinase [NTRK] genes NTRK1, NTRK2 and NTRK3, respectively), proto‑oncogene tyrosine‑protein kinase ROS (ROS1), and anaplastic lymphoma kinase (ALK), with IC₅₀ values of 0.1 to 2 nM. The major active metabolite of entrectinib, M5, showed similar in vitro potency and activity against TRK, ROS1, and ALK.

Fusion proteins that include TRK, ROS1 or ALK kinase domains drive tumourigenic potential through hyperactivation of downstream signalling pathways leading to unconstrained cell proliferation. Entrectinib demonstrated in vitro and in vivo inhibition of cancer cell lines derived from multiple tumour types, including subcutaneous and intracranial tumours, harbouring NTRK, ROS1, and ALK fusion genes.

Prior treatments with other drugs that inhibit the same kinases may confer resistance to entrectinib. Resistance mutations in the TRK kinase domain identified following entrectinib discontinuation include NTRK1 (G595R, G667C) and NTRK3 (G623R, G623E and G623K). Resistance mutations in the ROS1 kinase domain identified following entrectinib discontinuation include G2032R, F2004C and F2004I.

The molecular causes for primary resistance to entrectinib are not known. It is therefore not known if the presence of a concomitant oncogenic driver in addition to an NTRK gene fusion affects the efficacy of TRK inhibition.

Clinical efficacy and safety

NTRK gene fusion‑positive solid tumours

Efficacy in adult patients

The efficacy of Rozlytrek was evaluated in a pooled sub‑group of adult patients with unresectable or metastatic solid tumours with a NTRK gene fusion enrolled in one of three multicentre single‑arm, open‑label clinical trials (ALKA, STARTRK‑1 and STARTRK‑2) or the multicentre multi-cohort, single-arm open-label clinical trial, TAPISTRY. To be included in the pooled subgroup, patients were required to have confirmed NTRK gene fusion‑positive solid tumours; measurable disease per Response Evaluation Criteria in Solid Tumours (RECIST) v1.1; at least 12 months of follow‑up from the first post-treatment initiation tumour assessment, and no prior therapy with a TRK inhibitor (patients with concomitant driver mutations, where known, were excluded). Patients with primary CNS tumours were assessed separately using Response Assessment in Neuro‑Oncology Criteria (RANO). Patients received Rozlytrek 600 mg orally once daily until unacceptable toxicity or disease progression. The primary efficacy endpoints were objective response rate (ORR) and duration of response (DOR) as evaluated by Blinded Independent Central Review (BICR) according to RECIST v1.1.

Efficacy was assessed in 242 adult patients with solid tumours with an NTRK gene fusion enrolled in these trials. The baseline demographic and disease characteristics were: 47.5% males, median age of 58 years (range 19 years to 92 years), 37.2% and 9.9% were 65 years or older and 75 years or older respectively, 49.4% white Caucasian, 36.5% Asian, 3.3% Hispanic or Latino and 61.9% never smokers. The ECOG (Eastern Cooperative Oncology Group) performance status at baseline was 0 (42.1%), 1 (50%), or 2 (7.9%). Most patients (95.5%) had metastatic disease [most common sites being lung (62.8%), lymph nodes (49.2%), liver (33.1%), bone (31%) and brain (16.5%)], 4.5% patients had locally advanced disease. 76.9% and 52.5% of patients had received surgery and radiotherapy for their cancer, respectively. 71.5% patients had received prior systemic therapy for their cancer including chemotherapy (61.6%) and 37.2% patients had no prior systemic therapies for metastatic disease. The most common cancers were lung cancer (24.8%), sarcoma (19%), salivary gland tumours (15.7%), thyroid cancer (13.6%) colorectal cancer (7%) and breast cancer (7%). The overall median duration of follow‑up was 35.1 months.

Efficacy results from patients with NTRK gene fusion‑positive solid tumours are summarised in Table 7.

Table 7: Overall efficacy by BICR in adults with NTRK gene fusion-positive solid tumours

Objective response rate and duration of response by tumour type in adult patients with NTRK gene fusion‑positive solid tumours is presented in Table 8 below.

Table 8: Efficacy by tumour type, in adults with NTRK gene fusion‑positive solid tumours

Due to the rarity of NTRK gene fusion-positive cancers, patients were studied across multiple tumour types with a limited number of patients in some tumour types, causing uncertainty in the ORR estimate per tumour type. The ORR in the total population may not reflect the expected response in a specific tumour type.

The ORR in 122 patients that had broad molecular characterisation before Rozlytrek treatment was 59.8% [50.6, 68.6]; of those, the ORR in 97 patients who had other genomic alterations in addition to NTRK gene fusion was 55.7% [45.2, 65.8] and the ORR in 25 patients without other genomic alterations was 76% [54.9, 90.6].

Intracranial response

A BICR assessment resulted in a subgroup of 36 adult patients with CNS metastases at baseline, including 20 patients with measurable CNS lesions. Intracranial (IC) response assessed by BICR according to RECIST v1.1 was reported in 14 out of these 20 patients (7 CR and 7 PR), for an ORR of 70% (95% CI: 45.7, 88.1) and median DOR of 19.7 (7.4, 26.6). Five of these 20 patients had received intracranial radiotherapy to the brain within 2 months prior to starting Rozlytrek treatment.

Primary CNS tumour

Across the three trials, 16 adult patients with primary CNS tumours were treated with Rozlytrek with a minimum of 12 months of follow-up. Two out of the 12 adult patients had an objective response assessed by BICR according to RANO.

Efficacy in paediatric patients

Efficacy of Rozlytrek was assessed in 44 paediatric patients with solid tumours that have a NTRK gene fusion enrolled in STARTRK-NG or TAPISTRY.

To be included in the analysis, patients were required to have confirmed NTRK gene fusion-positive solid tumours; at least 6 months of follow-up, no prior therapy with a TRK inhibitor, at least one dose of entrectinib and presenting with measurable or evaluable disease at baseline. Patients received Rozlytrek doses from 20 mg to 600 mg once daily. The primary efficacy endpoint was ORR as evaluated by BICR according to RECIST v1.1 for extracranial tumours and according to RANO for primary CNS tumours. The secondary efficacy outcome measures included DOR as evaluated by BICR and time to first objective response (CR or PR).

The baseline demographic and disease characteristics were: 45.5% males, median age of 4 years (range: 2 months to 15 years), 52.3% white Caucasian, 34.1% Asian, and 9.1% Hispanic or Latino, with a median BSA of 0.73 m² (range: 0.2-1.9 m²). At baseline, 23.8% of patients had metastatic disease, 76.2% of patients had locally advanced disease, and 43.2% of patients had no prior systemic therapies for their cancer. The majority of patients had received prior treatment for their cancer including surgery (n=24), radiotherapy (n=8) and/or systemic therapy (n=25). The sites for metastatic disease included other (4 patients), brain (3 patients) and lung (3 patients). 45.5% of patients had primary CNS tumours. The overall median duration of follow-up was 24.2 months.

Efficacy results from patients with NTRK gene fusion-positive solid tumours are summarised in Table 10.

Table 10: Overall efficacy by BICR in paediatric patients with NTRK gene fusion-positive solid tumours

Objective response rate and duration of response by tumour type in paediatric patients with NTRK gene fusion-positive solid tumours is presented in Table 11.

Table 11: Efficacy by tumour type in paediatric patients with NTRK gene fusion-positive solid tumours

ROS1-positive NSCLC

The efficacy of Rozlytrek was evaluated in a pooled sub‑group of patients with ROS1-positive metastatic NSCLC who received Rozlytrek 600 mg orally once daily and were enrolled in one of three multicentre single-arm, open label clinical trials (ALKA, STARTRK-1 and STARTRK-2). To be included in the pooled sub-group, patients were required to have histologically confirmed, recurrent or metastatic, ROS1-positive NSCLC, ECOG performance status ≤ 2, measurable disease per RECIST v1.1, ≥ 6 months of follow‑up, and no prior therapy with a ROS1 inhibitor. All patients were assessed for CNS lesions at baseline.

The primary efficacy endpoints were ORR and DOR, as evaluated by BICR according to RECIST v1.1. The secondary efficacy endpoints included PFS, OS, and in patients presenting with CNS metastases at baseline - IC-ORR and IC-DOR, (also evaluated by BICR using RECIST v1.1).

Efficacy was assessed in 161 patients with ROS1-positive NSCLC. The baseline demographic and disease characteristics were: 35.4% males, median age of 54 years (range 20 years to 86 years), 24.2% and 4.3% were older than 65 years and 75 years of age, respectively, 44.1% white Caucasian, 45.3% Asian, 4.3%, Black, 2.6% Hispanic or Latino and 62.7% never smokers. The ECOG (Eastern Cooperative Oncology Group) performance status at baseline was 0 (41%), 1 (49.1%), or 2 (9.9%). Most patients (98.1%) had metastatic disease [most common sites being lymph nodes (69.6%), lung (50.3%) and brain (32.9%)], 1.9% patients had locally advanced disease and 37.3% patients had no prior systemic therapies for metastatic disease. ROS1 positivity was determined by NGS in 83% of patients, by FISH in 9% of patients, and by RT‑PCR in 8% of patients. The overall median duration of follow-up from receipt of the first dose was 15.8 months.

Efficacy results from patients with ROS1‑positive NSCLC are summarised in Table 9.

Table 9: Overall efficacy by BICR in patients with ROS1‑positive NSCLC

In the ROS1 positive NSCLC efficacy evaluable patients with ≥ 12 months of follow‑up (N = 94), the ORR was 73.4% (95% CI: 63.3, 82), the median DoR was 16.5 months (95% CI: 14.6, 28.6) and median PFS was 16.8 months (95% CI: 12, 21.4).

Intracranial response

A BICR assessment resulted in a subgroup of 46 ROS1-positive NSCLC patients with CNS metastases at baseline including 24 patients with measurable CNS lesions. Intracranial response assessed by BICR according to RECIST v1.1 was reported in 19 of these 24 patients (3 CR and 16 PR) for an ORR of 79.2% (95% CI: 57.8, 92.9). The percentage of patients (95% CI) with DOR ≥ 6 months, ≥ 9 months and ≥ 12 months was 76% (56, 97), 62% (38, 86), and 55% (29, 80), respectively (Kaplan-Meier estimates). Nine of these 24 patients had received intracranial radiotherapy to the brain within 2 months prior to starting Rozlytrek treatment.

Conditional approval

This medicinal product has been authorised under a so-called 'conditional approval' scheme. This means that further evidence on this medicinal product is awaited.

The European Medicines Agency will review new information on this medicinal product at least every year and this SmPC will be updated as necessary.

Paediatric population

The European Medicines Agency has deferred the obligation to submit the results of studies with Rozlytrek in one or more subsets of the paediatric population in the treatment with NTRK gene fusion‑positive locally advanced or metastatic solid tumours (see section 4.2 for information on paediatric use).

The pharmacokinetic parameters for entrectinib and its major active metabolite (M5), have been characterized in patients with NTRK gene fusion‑positive solid tumours and ROSI‑positive NSCLC and healthy subjects. The pharmacokinetics of entrectinib and M5 are linear and are not dose‑dependent or time‑dependent. Steady state is achieved within one week for entrectinib and two weeks for M5 following daily administration of Rozlytrek.

Entrectinib is a weak P‑gp substrate based on in vitro data. The exact in vivo contribution of P‑gp is unknown. M5 is a P‑gp substrate. Entrectinib is not a substrate of BCRP but M5 is a substrate of BCRP. Entrectinib and M5 are not substrates of OATP 1B1 or OATP1B3.

Absorption

Following a single 600 mg oral administration of Rozlytrek to patients with NTRK gene fusion‑positive and ROS1‑positive NSCLC under fed conditions, entrectinib was rapidly absorbed reaching time‑to‑maximum plasma concentration (T_max) after approximately 4 to 6 hours. Based on population pharmacokinetic analysis, steady‑state was achieved within 5 days for entrectinib with 600 mg once daily dosing.

No clinically significant effect of food on entrectinib bioavailability was observed.

Distribution

Entrectinib and its major active metabolite M5 are highly bound to human plasma proteins independent of drug concentrations. In human plasma, entrectinib and M5 had similar protein binding with >99% bound at a clinically relevant concentration.

After a single oral dose of entrectinib, the geometric mean volume of distribution (Vz/F) was 600 L, suggesting extensive distribution of the drug. Entrectinib demonstrated steady‑state brain‑to‑plasma concentration ratios of 0.4 to 2.2 in multiple animal species (mice, rats, and dogs) at clinically relevant systemic exposures.

Biotransformation

Entrectinib is metabolised predominantly by CYP3A4 (~76%). Minor contributions from several other CYPs and UGT1A4 were estimated at <25% in total. The active metabolite M5 (formed by CYP3A4) and the direct N‑glucuronide conjugate, M11, (formed by UGT1A4) are the two major circulating metabolites identified.

Elimination

The population PK model estimated mean accumulation at steady‑state following 600 mg once daily administration of entrectinib was 1.89 (± 0.381) and 2.01 (± 0.437) for M5. Following administration of a single dose of [¹⁴C]‑labelled entrectinib, 83% radioactivity was excreted in faeces (36% of the dose as unchanged entrectinib and 22% as M5) with minimal excretion in urine (3%).

Entrectinib and M5 account for approximately 73% of radioactivity in systemic circulation at C_max, and approximately half of total radioactivity AUC_inf.

Population PK analysis estimated apparent clearance CL/F was 19.6 L/h and 52.4 L/h for entrectinib and M5, respectively. The elimination half‑lives of entrectinib and M5 were estimated to be 20 hours and 40 hours, respectively.

Linearity/Non‑linearity

Entrectinib has linear pharmacokinetics in the dose range of 100 mg to 600 mg.

Pharmacokinetics in special populations

Paediatric population

Data obtained from population pharmacokinetic analyses show that in paediatric patients 12 years and older, a dose of 400 mg Rozlytrek once daily for BSA range 1.11 m² to 1.50 m², and a dose of 600 mg Rozlytrek once daily for BSA range ≥ 1.51 m² results in a similar systemic exposure attained in adults treated with 600 mg of Rozlytrek, once daily.

Elderly

No differences in entrectinib exposure were noted in patients older than 65 years and younger adults based on pharmacokinetic analysis.

Renal impairment

Negligible amounts of entrectinib and the active metabolite M5 are excreted unchanged in urine (~3% of the dose) indicating that renal clearance plays a minor role in the elimination of entrectinib. Based on population pharmacokinetic analyses, the pharmacokinetics of entrectinib are not significantly affected in renal impairment. The impact of severe renal impairment on the pharmacokinetics of entrectinib is unknown.

Hepatic impairment

The pharmacokinetics of entrectinib were studied in subjects with mild (Child-Pugh A), moderate (Child-Pugh B) and severe (Child-Pugh C) hepatic impairment, relative to subjects with normal hepatic function. Following administration of a single oral dose of 100 mg entrectinib, the combined AUC_last of entrectinib and M5 showed no relevant change in the hepatic impaired groups compared to the normal function group. The AUC_last geometric mean ratio (90% CI) was 1.30 (0.889, 1.89) for the mild, 1.24 (0.886, 1.73) for the moderate, and 1.39 (0.988, 1.95) for the severe hepatic impaired groups compared to the normal hepatic function group. For the unbound entrectinib and M5, the AUC_last (fu) geometric mean ratio (90% CI) was 1.91 (1.21, 3.02) for the mild, 1.57 (1.06, 2.31) for the moderate, and 2.34 (1.57, 3.48) for the severe hepatic impaired groups compared to the normal hepatic function group. Although the effect of hepatic impairment on unbound PK parameters generally followed a similar direction as total PK parameters, due to the high non-specific binding in buffer and high variability, results should be interpreted with caution.

In addition it was also observed that the variability in systemic exposure was high and observed exposures overlapped across all the study groups (see section 4.2).

Effects of age, body weight, race and gender

No clinically significant differences in the pharmacokinetics of entrectinib were observed based on age (4 years to 86 years), sex, race (Asian, Black and White) and body weight (32 kg to 130 kg).

Carcinogenicity

No carcinogenicity studies have been performed to establish the carcinogenic potential of entrectinib.

Genotoxicity

Entrectinib was not mutagenic in vitro in the bacterial reverse mutation (Ames) assay, but demonstrated a potential for abnormal chromosome segregation (aneugenicity) in cultured human peripheral blood lymphocytes. Entrectinib was not clastogenic or aneugenic in the in vivo micronucleus assay in rats and did not induce DNA damage in a comet assay in rats.

Impairment of fertility

Dedicated fertility studies in animals have not been performed to evaluate the effect of entrectinib. No adverse effects of entrectinib on male and female reproductive organs were observed in the repeat‑dose toxicology studies in rats and dogs at approximately 2.4‑fold and 0.6‑fold, respectively, the human exposure by AUC at the recommended human dose.

Reproductive toxicity

In an embryo‑foetal developmental study in rats, maternal toxicity (decreased body weight gain and food consumption) and foetal malformations (including body closure defects and malformations of the vertebrae and ribs), were observed at 200 mg/kg/day of entrectinib which represents approximately 2‑fold the human exposure by AUC at the recommended dose. Dose‑response dependent reduced foetal body weight (low, middle and high dose) and reduced skeletal ossification (middle and high dose) were observed at exposures equivalent to <2 times the human exposure by AUC at the recommended dose.

Repeat dose toxicity studies

Entrectinib‑related toxicities in repeat‑dose studies in adult rats and dogs, and juvenile rats were observed in the CNS (convulsions, abnormal gait, tremors) at ≥ 0.2 times the human exposures by C_max at the recommended dose, skin (scabs/sores) and decreased RBC parameters at ≥ 0.1 times the human exposure by AUC at the recommended dose. In adult rats and dogs, effects on liver (increased ALT and hepatocellular necrosis) were observed at ≥ 0.6 times the human exposure by AUC at the recommended dose. In dogs, diarrhoea at ≥ 0.1 times the human exposure by AUC at the recommended dose and prolongations of QT/QTc interval at ≥ 0.1 times the human exposure by C_max at the recommended dose were also observed.

Juvenile rat toxicology study

In a 13‑week juvenile rat toxicology study animals were dosed daily from post‑natal day 7 to day 97 (approximately equivalent to neonate to adulthood in humans). In addition to CNS effects, ptosis and skin effects, decreased RBC parameters and effects on growth and development were observed in the dosing and recovery phases including decreased body weight gain and delayed sexual maturation (at ≥ 4 mg/kg/day, approximately 0.1 times the human exposure by AUC at the recommended dose). Deficits in neurobehavioral assessments including functional observational battery (decreased landing foot splay, decreased fore and hind limb grip strength that seemed to manifest later in age) and learning and memory (at ≥ 8mg/kg/day, approximately 0.2 times the human exposure by AUC at the recommended dose), and decreased femur length (at ≥ 16 mg/kg/day, approximately 0.3 times the human exposure by AUC at the recommended dose) were observed.

Capsule content

Tartaric acid

Lactose

Hypromellose

Crospovidone

Microcrystalline cellulose

Colloidal anhydrous silica

Magnesium stearate

Capsule shell

Hypromellose

Titanium dioxide (E171)

Yellow iron oxide (E172 – 100 mg hard capsule)

Sunset yellow FCF (E110 – 200 mg hard capsule)

Printing ink

Shellac

Propylene glycol

Indigo carmine aluminium lake (E132)

Not applicable.

4 years

Store in the original package and keep the bottle tightly closed in order to protect from moisture.

Rozlytrek 100 mg hard capsules

HDPE bottles containing 30 hard capsules with a child‑resistant, tamper‑evident closure and silica gel desiccant integrated in the cap.

Rozlytrek 200 mg hard capsules

HDPE bottles containing 90 hard capsules with a child‑resistant, tamper‑evident closure and silica gel desiccant integrated in the cap.

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