Indicated for: lymphoma
Route of administration: injectable
Substance: mosunetuzumab (monoclonal antibody)
ATC: L01FX25 (Antineoplastic and immunomodulating agents | Monoclonal antibodies and antibody drug conjugates | Other monoclonal antibodies and antibody drug conjugates)
Risk of severe allergic reaction. Seek urgent medical help if serious symptoms occur.
This medicine is subject to additional monitoring.
Use during breastfeeding only on medical advice.
Use during pregnancy only on medical advice.
Mosunetuzumab is a monoclonal antibody used for the treatment of certain types of non-Hodgkin lymphoma, including relapsed or refractory follicular lymphoma. It works by activating T cells of the immune system to attack cancer cells.
The medication is administered via intravenous infusion and is used in cases where other treatments have failed. It is effective in reducing tumor size and prolonging patient survival.
Side effects may include cytokine release syndrome, fever, fatigue, nausea, and infections. Close monitoring is essential to manage potential complications.
Consult your doctor to discuss the benefits and risks of treatment with Mosunetuzumab. This medication must be administered under the supervision of an oncology specialist.
Lunsumio 5 mg solution for injection
Lunsumio 45 mg solution for injection
Lunsumio 5 mg solution for injection
Each vial contains 5 mg of mosunetuzumab in 0.5 mL at a concentration of 10 mg/mL.
Lunsumio 45 mg solution for injection
Each vial contains 45 mg of mosunetuzumab in 1 mL at a concentration of 45 mg/mL.
Mosunetuzumab is a full-length, humanised anti-CD20/CD3 immunoglobulin (Ig)G1 isotype that isproduced in Chinese hamster ovary (CHO) cells by recombinant DNA technology.
Excipient with known effectEach 5 mg vial contains 0.3 mg of polysorbate 20.
Each 45 mg vial contains 0.6 mg of polysorbate 20.
For the full list of excipients, see section 6.1.
Solution for injection
Clear, colourless to slightly brownish-yellow, preservative free liquid and pH 5.8. Osmolality of the 5mg mosunetuzumab is 260-360 mOsm/kg and osmolality of the 45 mg mosunetuzumab is 275-375 mOsm/kg.
Lunsumio as monotherapy is indicated for the treatment of adult patients with relapsed or refractoryfollicular lymphoma (FL) who have received at least two prior systemic therapies.
Lunsumio must only be administered under the supervision of a healthcare professional qualified inthe use of anti-cancer therapies, in a setting with appropriate medical support to manage severereactions such as cytokine release syndrome (CRS) and Immune Effector Cell-Associated
Neurotoxicity Syndrome (ICANS) (see below and section 4.4).
It is important to check the product labels to ensure that the correct formulation (intravenous orsubcutaneous fixed dose) is being administered to the patient, as prescribed. Lunsumio subcutaneousformulation is not intended for intravenous administration and should be administered via asubcutaneous injection only.
PosologyLunsumio subcutaneous injection should be administered to well-hydrated patients.
Table 1 provides details on recommended premedication for CRS.
Table 1 Premedication to be administered to patients prior to Lunsumio subcutaneousinjection
Patients requiring Premedicationpremedication
Intravenous or oral corticosteroids: dexamethasone 20 mg
Cycles 1 all patients (preferred) or methylprednisolone 80 mg
Anti-histaminea: 50-100 mg diphenhydramine hydrochloride or
Cycles 2+: patients who equivalent oral or intravenous anti-histamineexperienced any grade CRSwith the previous dose Anti-pyretica: 500-1000 mg paracetamolaAnti-histamines and anti-pyretics are optional in cycle 1 and beyond
The recommended dose of Lunsumio subcutaneous injection for each 21 day-cycle is detailed in
Table 2.
Table 2 Dose of Lunsumio subcutaneous injection for patients with relapsed or refractoryfollicular lymphoma
Day of treatment Dose of Lunsumio
Cycle 1 Day 1 5 mg
Day 8 45 mg
Day 15 45 mg
Cycle 2 and beyond Day 1 45 mg
Duration of treatmentLunsumio subcutaneous injection should be administered for 8 cycles, unless a patient experiencesunacceptable toxicity or disease progression.
For patients who achieve a complete response, no further treatment beyond 8 cycles is required. Forpatients who achieve a partial response or have stable disease in response to treatment with Lunsumiosubcutaneous injection after 8 cycles, an additional 9 cycles of treatment (17 cycles total) should beadministered, unless a patient experiences unacceptable toxicity or disease progression.
Delayed or missed doseTable 3 Recommendations for restarting therapy with Lunsumio subcutaneous injectionafter dose delay
Last dose administered Time since the last dose Action for next dose(s)administered5 mg 1 week to 2 weeks Administer 45 mg (Cycle 1
Cycle 1 Day 1 Day 8)*, then resume theplanned treatment schedule> 2 weeks Repeat 5 mg (Cycle 1 Day 1)*,then administer 45 mg (Cycle 1
Day 8)* and resume theplanned treatment schedule45 mg 1 week to less than 6 weeks Administer 45 mg (Cycle 1
Cycle 1 Day 8 Day 15)*, then resume theplanned treatment schedule≥ 6 weeks Repeat 5 mg*, then administer45 mg (Cycle 1 Day 15)*7 days later and resume theplanned treatment schedule45 mg 1 week to less than 6 weeks Administer 45 mg (Cycle 2
Cycle 1 Day 15 Day 1), then resume theplanned treatment schedule≥ 6 weeks Repeat 5 mg (Cycle 2 Day 1)*,then administer 45 mg (Cycle 2
Day 8)* followed by 45 mg on
Day 1 of subsequent cycles45 mg 3 weeks to less than 6 weeks Administer 45 mg, then resume
Cycle 2 and beyond the planned treatment schedule≥ 6 weeks Repeat 5 mg* on Day 1 duringthe next cycle, then administer45 mg* on Day 8, followed by45 mg on Day 1 of subsequentcycles
*Administer premedication as per Cycle 1
Note that all references to Cycle and Day are to the nominal Cycle and Day.
Dose modificationPatients who experience grade 3 or 4 reactions (e.g. serious infection, tumour flare, tumour lysissyndrome) should have treatment temporarily withheld until symptoms are resolved (see section 4.4).
Cytokine Release Syndrome
CRS should be identified based on clinical presentation (see section 4.4). Patients should be evaluatedand treated for, other causes of fever, hypoxia, and hypotension, such as infections/sepsis. If CRS issuspected, patients should be managed according to the recommendations in Table 4.
Table 4 CRS grading1 and management
CRS grade CRS management2 Next scheduled injection of
Lunsumio
Grade 1 The symptoms should be treated Ensure symptoms areresolved for at least 72 hours
Fever ≥ 38ºC If CRS lasts > 48 hours after symptomatic prior to next dosemanagement:
- Dexamethasone3 and/or tocilizumab4,5 Consider administration ofshould be considered premedication withantihistamines, anti-pyreticmedication, and monitorclosely for CRS
Grade 2 The symptoms should be treated The symptoms should beresolved for at least 72 hours
Fever ≥ 38ºC If no improvement occurs after symptomatic prior to next injectionand/or hypotension management:not requiring - Dexamethasone3 and/or tocilizumab4,5 Premedication should bevasopressors should be considered maximised as appropriate7and/or hypoxia and patients monitored morerequiring frequentlylow-flow oxygen6by nasal cannulaor blow-by
Grade 3 The symptoms should be treated The symptoms should be
Dexamethasone3 and tocilizumab4, 5 should be resolved for at least 72 hours
Fever ≥ 38ºC administered prior to next injectionand/or hypotensionrequiring a If CRS is refractory to dexamethasone and Patients should be monitoredvasopressor tocilizumab: more frequently and(with or without - Alternative immunosuppressants9 and hospitalised for the next dosevasopressin) methylprednisolone 1 000 mg/dayand/or intravenously should be administered Premedication should behypoxia requiring until clinical improvement maximised as appropriate7highflow oxygen8 by If CRS occurred after 5 mgnasal cannula, face or 45 mg, the next dosemask, should be 5 mg. Thenon-rebreather treatment schedule should bemask, or Venturi resumed after recovery.mask
If CRS Grade 3 occurs withnext doses permanentlydiscontinue treatment.
Grade 4
- Treatment with Lunsumio subcutaneous injection should be permanently
Fever ≥ 38ºC discontinuedand/or hypotension - The symptoms should be treatedrequiring multiple - Dexamethasone3 and tocilizumab4, 5 should be administeredvasopressors(excluding If CRS is refractory to dexamethasone and tocilizumab:vasopressin) - Alternative immunosuppressants9 and methylprednisolone 1 000 mg/dayand/or intravenously should be administered until clinical improvementhypoxia requiringoxygen by positivepressure(e.g., CPAP,
BiPAP,intubation andmechanicalventilation)1 ASTCT = American Society for Transplantation and Cellular Therapy. Premedication may maskfever, therefore if clinical presentation is consistent with CRS, please follow these managementguidelines.2 If CRS is refractory to management, consider other causes including haemophagocyticlymphohistiocytosis3 Dexamethasone should be administered at 10 mg orally every 6 hours (or equivalent)until clinical improvement4 In study GO29781, tocilizumab was administered intravenously at a dose of 8 mg/kg (not to exceed800 mg per infusion), as needed for CRS management5 If no clinical improvement in the signs and symptoms of CRS occurs after the first dose, a seconddose of intravenous tocilizumab 8 mg/kg may be administered at least 8 hours apart (maximum 2doses per CRS event). Within each time period of 6 weeks of Lunsumio subcutaneous injectiontreatment, the total amount of tocilizumab doses should not exceed 3 doses6 Low-flow oxygen is defined as oxygen delivered at < 6 L/minute7 Refer to Table 1 for additional information8 High-flow oxygen is defined as oxygen delivered at ≥ 6 L/minute9 Riegler L et al. (2019)
Immune Effector Cell-Associated Neurotoxicity Syndrome (ICANS) grading and management
ICANS should be identified based on clinical presentation (see Section 4.4). Rule out other causes ofneurologic symptoms. If ICANS is suspected, it should be managed according to the recommendationsin Table 5.
Table 5 Immune Effector Cell-Associated Neurotoxicity Syndrome (ICANS)
Gradea Actions
Grade 1 Withhold Lunsumio subcutaneous injection andmonitor neurologic toxicity symptoms until ICANS
ICEb 7-9 or depressed level of resolves.c,dconsciousness but awakens spontaneously
Provide supportive therapy and consider neurologicconsultation and evaluation.
Consider a single dose of dexamethasone 10 mg, ifnot taking other corticosteroids.
Consider non-sedating, anti-seizure medicinalproducts (e.g., levetiracetam) for seizureprophylaxis.
Grade 2 Withhold Lunsumio subcutaneous injection andmonitor neurologic toxicity symptoms until ICANS
ICEb 3-6 or depressed level of resolves.c,dconsciousness but awakens to voice
Provide supportive therapy and consider neurologicconsultation and evaluation.
Treat with dexamethasone 10 mg intravenouslyevery 6 hours, if not taking other corticosteroids,until improvement to Grade 1, then taper.
Consider non-sedating, anti-seizure medicinalproducts (e.g., levetiracetam) for seizureprophylaxis.
Grade 3 Withhold Lunsumio subcutaneous injection andmonitor neurologic toxicity symptoms until ICANS
ICEb 0-2 or depressed level of resolves.d,econsciousness but awakens to tactilestimulus or any clinical seizure that Provide supportive therapy, which may includeresolves rapidly or focal/local oedema on intensive care, and consider neurologic consultationneuroimaging and evaluation.
Treat with dexamethasone 10 mg intravenouslyevery 6 hours, if not taking other corticosteroids,until improvement to Grade 1, then taper.
Consider non-sedating anti-seizure medication forseizure prophylaxis until resolution of ICANS. Useanti-seizure medication for seizure management asneeded.
For recurrent grade 3 ICANS, consider permanentlydiscontinuing Lunsumio subcutaneous injection.
Grade 4 Permanently discontinue Lunsumio subcutaneousinjection.
ICEb is 0 or patient is unarousable orrequires vigorous or repetitive tactile Provide supportive therapy, which may includestimuli, or life-threatening prolonged intensive care, and consider neurologic consultationseizure (> 5 min) or repetitive seizures and evaluation.without return to baseline or deep focalmotor weakness or diffuse cerebral oedema Treat with dexamethasone 10 mg intravenouslyon neuroimaging every 6 hours, if not taking other corticosteroids,until improvement to Grade 1, then taper.
Alternatively, consider administration ofmethylprednisolone 1 000 mg per day intravenouslyfor 3 days, if symptoms improve, then manage asabove.
Consider non-sedating anti-seizure medication forseizure prophylaxis until resolution of ICANS. Useanti-seizure medication for seizure management asneeded.
a American Society for Transplantation and Cellular Therapy (ASTCT) consensus grading criteria.b If patient is arousable and able to perform Immune Effector Cell-Associated Encephalopathy (ICE)
Assessment, assess: Orientation (oriented to year, month, city, hospital = 4 points); Naming (name 3objects, e.g., point to clock, pen, button = 3 points); Following Commands (e.g., “show me 2 fingers”or “close your eyes and stick out your tongue” = 1 point); Writing (ability to write a standardsentence = 1 point; and Attention (count backwards from 100 by ten = 1 point). If patient isunarousable and unable to perform ICE Assessment (Grade 4 ICANS) = 0 points.
c Consider the type of neurologic toxicity before deciding to withhold Lunsumio subcutaneousinjection.d See Delayed or missed dose for guidance on restarting Lunsumio subcutaneous injection after dosedelay.e Evaluate benefit/risk before restarting Lunsumio subcutaneous injection.
Special populationsNo dose adjustment of Lunsumio subcutaneous injection is required in patients ≥ 65 years of age (seesection 5.2).
Renal impairmentLunsumio subcutaneous injection has not been studied in patients with severe renal impairment. Doseadjustments are not considered necessary in patients with mild to moderate renal impairment based onpharmacokinetics (see section 5.2).
Hepatic impairmentLunsumio subcutaneous injection has not been studied in patients with hepatic impairment. Doseadjustments are not considered necessary based on pharmacokinetics (see section 5.2).
Paediatric populationThe safety and efficacy of Lunsumio subcutaneous injection in children below 18 years of age havenot yet been established.
Method of administrationThe 5 mg and 45 mg doses should be administered as subcutaneous injection only. The injectionshould be administered subcutaneously into the tissue of the abdomen or thigh, changing the site ofinjection with each dose and never into areas where the skin has tattoos, moles or scars or areas wherethe skin is red, bruised, tender, hard, or not intact.
Hypersensitivity to the active substance or to any of the excipients listed in section 6.1.
In order to improve traceability of biological medicinal products, the trade name and the batch numberof the administered product should be clearly recorded.
Cytokine Release Syndrome (CRS)CRS, including life-threatening reactions, have occurred in patients receiving Lunsumio subcutaneousinjection (see section 4.8). Signs and symptoms included pyrexia, hypotension, and hypoxia, CRSevents occurred predominantly in cycle 1 and were mainly associated with Day 1 and Day 8 doseadministrations. The most frequently reported CRS signs and symptoms in ≥10% of patients treatedwith Lunsumio subcutaneous injection in the who experienced CRS events of any grade by ASTCT2019 (36 patients) were pyrexia, hypotension, hypoxia, chills, tachycardia and headache.
Patients should be premedicated with corticosteroids, antipyretics and antihistamines at least throughcycle 1. Patients must receive adequate hydration prior to the administration of Lunsumiosubcutaneous injection. Patients should be monitored for signs or symptoms of CRS. Patients shouldbe counselled to seek immediate medical attention should signs or symptoms of CRS occur at anytime. Physicians should institute treatment with supportive care, tocilizumab and/or corticosteroids asindicated. (see section 4.2).
Serious infectionsSerious infections such as pneumonia, COVID-19, and sepsis have occurred in patients receiving
Lunsumio subcutaneous injection, some of which were life-threatening or fatal events (seesection 4.8). Febrile neutropenia was observed in patients after receiving Lunsumio subcutaneousinjection.
Lunsumio subcutaneous injection should not be administered in the presence of active infections.
Caution should be exercised when considering the use of Lunsumio subcutaneous injection in patientswith a history of recurring or chronic infections (e.g., chronic, active Epstein-Barr Virus), withunderlying conditions that may predispose to infections or who have had significant priorimmunosuppressive treatment. Patients should be administered prophylactic antibacterial, antiviraland/or antifungal medicinal products, as appropriate. Patients should be monitored for signs andsymptoms of infection, before and after Lunsumio subcutaneous injection administration, and treatedappropriately. In the event of febrile neutropenia, patients should be evaluated for infection andmanaged with antibiotics, fluids and other supportive care, according to local guidelines.
Immune Effector Cell-Associated Neurotoxicity Syndrome (ICANS)
ICANS have occurred in patients receiving Lunsumio subcutaneous injection, including serious andlife threatening reactions. The onset of ICANS can be concurrent with CRS, following resolution of
CRS, or in the absence of CRS. Manifestations of ICANS reported in clinical trials includedconfusional state, lethargy, encephalopathy, depressed level of consciousness, and memoryimpairment. The majority of cases occurred during Cycle 1.
Patients should be monitored for signs and symptoms of ICANS following Lunsumio subcutaneousinjection administration. Patients must be counselled to seek immediate medical attention should signsor symptoms occur at any time (see Patient card below).
Patients should be advised to exercise caution while (or avoid if symptomatic) driving, cycling orusing heavy or potentially dangerous machines (see section 4.7).
At the first signs or symptoms of ICANS, manage according to the ICANS guidance provided in Table5. Treatment with Lunsumio subcutaneous injection should be withheld or discontinued permanentlyas recommended.
Haemophagocytic lymphohistiocytosis
Haemophagocytic lymphohistiocytosis (HLH), including fatal cases, have been reported in patientsreceiving Lunsumio. HLH is a life-threatening syndrome characterized by fever, hepatomegaly andcytopenias. HLH should be considered when the presentation of CRS is atypical or prolonged. Patientsshould be monitored for clinical signs and symptoms of HLH (see Section 4.2). For suspected HLH,
Lunsumio must be interrupted and treatment for HLH initiated.
Tumour flareTumour flare has been reported in patients treated with Lunsumio subcutaneous injection (seesection 4.8). Manifestations included new or worsening pleural effusions, localised pain and swellingat the sites of lymphoma lesions and tumour inflammation. Consistent with the mechanism of action of
Lunsumio subcutaneous injection, tumour flare is likely due to the influx of T-cells into tumour sitesfollowing Lunsumio subcutaneous injection administration.
There are no specific risk factors for tumour flare that have been identified, however, there is aheightened risk of compromise and morbidity due to mass effect secondary to tumour flare in patientswith bulky tumours located in close proximity to airways and/or a vital organ. Patients treated with
Lunsumio subcutaneous injection should be monitored and evaluated for tumour flare at criticalanatomical sites.
Tumour lysis syndrome (TLS)TLS can occur in patients receiving Lunsumio subcutaneous injection (see section 4.8). Patients musthave adequate hydration prior to the administration of Lunsumio subcutaneous injection. Patientsshould be administered prophylactic anti-hyperuricemic therapy (e.g. allopurinol, rasburicase), asappropriate. Patients should be monitored for signs or symptoms of TLS, especially patients with hightumour burden or rapidly proliferative tumours, and patients with reduced renal function. Patientsshould be monitored for blood chemistries and abnormalities should be managed promptly.
ImmunisationLive and/or live-attenuated vaccines should not be given concurrently with Lunsumio subcutaneousinjection. Studies have not been conducted in patients who recently received live vaccines.
Patient cardThe prescriber must discuss the risks of Lunsumio therapy with the patient. The patient should beprovided with the patient card and instructed to carry it at all times. The patient card describes thecommon signs and symptoms of CRS and ICANS, including instructions on when a patient shouldseek medical attention.
Excipients with known effectThis medicinal product contains polysorbate 20. Each vial of Lunsumio 5 mg solution for injectioncontains 0.3 mg of polysorbate 20, and each vial of Lunsumio 45 mg solution for injection contains0.6 mg of polysorbate 20, which is equivalent to 0.6 mg/mL.
Polysorbates may cause allergic reactions.
No interaction studies have been performed.
A transient clinically relevant effect on CYP450 substrates with a narrow therapeutic index (e.g.warfarin, voriconazole, cyclosporine, etc) cannot be excluded, since initiation of Lunsumiosubcutaneous injection treatment causes a transient increase in cytokine levels which may causeinhibition of CYP450 enzymes. On initiation of Lunsumio subcutaneous injection therapy in patientsbeing treated with CYP450 substrates with a narrow therapeutic index, therapeutic monitoring shouldbe considered. The dose of the concomitant medicinal product should be adjusted as needed.
Women of childbearing potential should use effective contraception while receiving Lunsumiosubcutaneous injection and for at least 3 months after the last injection of Lunsumio subcutaneousinjection.
PregnancyThere are no data from the use of Lunsumio subcutaneous injection in pregnant women. Animalstudies are insufficient with respect to reproductive toxicity (see section 5.3). Lunsumio subcutaneousinjection is not recommended during pregnancy and in women of childbearing potential not usingcontraception.
Breast-feedingIt is unknown whether mosunetuzumab/metabolites are excreted in human milk. A risk tonewborns/infants cannot be excluded. Breast-feeding should be discontinued during treatment with
Lunsumio subcutaneous injection.
FertilityNo human data on fertility are available. No impairments were observed in male or femalereproductive organs in the 26-week toxicity studies with cynomolgus monkeys at exposures (AUC)similar to exposure (AUC) in patients receiving the recommended dose.
Lunsumio subcutaneous injection has major influence on the ability to drive and use machines. Due tothe potential for ICANS, patients receiving Lunsumio subcutaneous injection are at risk of depressedlevel of consciousness (see section 4.4). Due to the potential for ICANS, patients should be advised toexercise caution while (or avoid if symptomatic) driving, cycling or using heavy or potentiallydangerous machines.
The adverse reactions described in this section were identified from the pivotal clinical trial GO29781in patients treated at the recommended intravenous dose (n=218) and the recommended subcutaneousdose (n=139). Patients had follicular lymphoma (51.8%), diffuse large B-cell lymphoma (26.9%),transformed follicular lymphoma (9.8%) mantle cell lymphoma (7.3%), Richter’s transformation(3.9%), and other histologies (0.3%). The median number of cycles of Lunsumio subcutaneousreceived was 8 (range 1 -17), 47.5% of patients received 8 cycles, and 16.6% received more than8 cycles up to 17 cycles.
Patients who received the recommended intravenous dose (n=218) and subcutaneous (n=139) dose arepooled (n=357) for this safety population. In this pooled safety population, the most common adversereactions (≥ 20%) observed were cytokine release syndrome, neutropenia, rash and upper respiratorytract infection and injection site reactions in those treated with subcutaneous mosunetuzumab. Themost common serious adverse reactions (≥ 2%) observed included cytokine release syndrome (CRS)(17% by ASTCT grading system), pyrexia (3%), sepsis (3%), upper respiratory tract infection (3%)and pneumonia (5%). Permanent discontinuation of Lunsumio due to an adverse reaction occurred in5.8% (21/357) of patients. In patients who received the recommended subcutaneous dose (n=139), theadverse reactions that led to discontinuation in more than one patient were COVID-19 1.4% (2/139)and COVID-19 pneumonia 3.6% (5/139).
Tabulated list of adverse reactionsThe adverse reactions are listed below by MedDRA system organ class (SOC) and categories offrequency. 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 notknown (cannot be estimated from the available data). Within each frequency grouping, adversereactions are presented in order of decreasing seriousness.
Table 6 Adverse reactions occurring in patients treated with Lunsumio
System organ class/preferred term oradverse reaction All grades19 Grade 3 - 4
Infections and infestationsUpper respiratory tract infection1 Very Common Common
Urinary tract infection2 Common Common
Pneumonia3 Common Common
Lower respiratory tract infection4 Common Uncommon
Sepsis5 Common Common
Neoplasms benign, malignant and unspecified (including cysts and polyps)
Tumour flare6 Common Uncommon
Blood and lymphatic system disordersNeutropenia7 Very common Very common
Anaemia Very common Common
Thrombocytopenia8 Very common Common
Febrile neutropenia Common Common
Immune system disordersCytokine release syndrome9 Very common Common
Haemophagocytic lymphohistiocytosis10,17 Uncommon Uncommon
Metabolism and nutrition disordersHypophosphataemia11 Very common Very common
Hypokalaemia12 Very common Common
Hypomagnesaemia13 Common Very rare
Tumour lysis syndrome Uncommon Uncommon
System organ class/preferred term oradverse reaction All grades19 Grade 3 - 4
Nervous system disordersHeadache14 Very common Uncommon
Dizziness15 Common Very rare
Immune effector cell-associatedneurotoxicity syndrome16,17 Common Very rare
Gastrointestinal disordersDiarrhoea Very common Uncommon
Nausea Very common Uncommon
Skin and subcutaneous tissue disordersRash18 Very common Common
Pruritus Very common Very rare
Dry skin Very common Very rare
Skin exfoliation Common Very rare
General disorders and administration site conditionsPyrexia Very common Common
Chills Very common Uncommon
Injection site reactions Very common Very rare
InvestigationsAlanine aminotransferase, increased Common Common
Aspartate aminotransferase, increased Common Common1 Upper respiratory tract infection includes upper respiratory tract infection, viral upper respiratorytract infection, nasopharyngitis, sinusitis, rhinovirus infection, sinusitis bacterial, viral sinusitis,respiratory tract infection, COVID-19 and respiratory tract infection viral2 Urinary tract infection (UTI) includes UTI, Escherichia UTI, pyelonephritis acute3 Pneumonia includes pneumonia and COVID-19 pneumonia4 Lower respiratory tract infection includes lower respiratory tract infection and bronchitis5 Sepsis includes sepsis, septic shock, bacteraemia, Candida sepsis6 Tumour flare includes tumour flare, pleural effusion, tumour inflammation and flank pain7 Neutropenia includes neutropenia and neutrophil count decreased8 Thrombocytopenia includes thrombocytopenia and platelet count decreased9 By American Society for Transplantation and Cellular Therapy10 Haemophagocytic lymphohistocytosis (HLH) includes HLH11 Hypophosphatemia includes hypophosphatemia and blood phosphorus decreased12 Hypokalemia includes hypokalemia and blood potassium decreased13 Hypomagnesemia includes hypomagnesemia and blood magnesium decrease14 Headache includes headache, migraine and head discomfort15 Dizziness includes dizziness and vertigo16 Consistent with the medical concept of ICANS according to American Society for Transplantationand Cellular Therapy and includes confusional state, ICANS, lethargy, encephalopathy, depressedlevel of consciousness, and memory impairment17 The frequency calculation is based on additional clinical studies18 Rash includes rash, rash erythematous, exfoliative rash, rash macular, rash maculo-papular, rashpruritic, rash pustular, erythema, palmar erythema, dermatitis, dermatitis acneiform, dermatitis contact,palmar-planta erythrodysaesthesia and rash morbiliform19 Grade 5 AEs only occurred for ADR terms HLH, pneumonia, sepsis and URTI (i.e., COVID-19) inmosuntezumab subcutaneous injection (1 each) and for ADR terms pneumonia and sepsis inmosunetuzumab intravenous infusion (1 each)
Description of selected adverse reactionsCRS (ASTCT grading system) of any grade occurred in 26% (36/139) of patients, with grade 2occurring in 7.2%, grade 3 occurring in 1.4% treated with Lunsumio subcutaneous injection.
CRS of any grade occurred in 15.8% of patients after the Cycle 1, Day 1 dose; 11.7% after the
Cycle 1, Day 8 dose; 2.2% after the Cycle 1, Day 15 dose, 0.8% occurred in patients after the Cycle 2and 0% in Cycles 3 and beyond. The median time to CRS onset from the start of administration in
Cycle 1 Day 1 was 17.62 hours (range: 7.2-33.4 hours), Cycle 1 Day 8 was 51.5 hours (range: 30.3-112.5 hours), Cycle 1 Day 15 was 46.7 hours (range: 23.2-61.5 hours), and Cycle 2 Day 1 was34.85 hours (range: 34.8-34.8 hours). CRS resolved in all patients, and the median duration of CRSevents was 2 days (range 1-15 days).
Of the 36 patients that experienced CRS, the most common signs and symptoms of CRS includedpyrexia (97.2%), hypotension (22%), hypoxia (19.4%), chills (13.9%), headache (11.1%) andtachycardia (11.1%).
Tocilizumab and/or corticosteroids were used to manage a CRS event in 12% of patients: 5.7%received tocilizumab alone, pct. 4.3% received corticosteroids alone, and 1.4% received both tocilizumaband corticosteroids. Patients with grade 3 CRS received tocilizumab, corticosteroids, vasopressorsand/or oxygen supplementation.
Hospitalisations due to CRS occurred in 11.5% of patients and the median duration of hospitalisationfor serious CRS events was 4.0 days (range 1-34 days).
NeutropeniaIn patients treated with Lunsumio intravenous infusion or subcutaneous injection, neutropenia of anygrade occurred in 26.1% (93/357) of patients, including 22.7% Grade 3-4 events. The median time toonset of first neutropenia/neutrophil count decreased events was 50 days (range: 1-280 days), withmedian duration of 8 days (range: 1-487 days). Of the 93 patients who had neutropenia/neutrophilcount decreased events 68% (63/93) received treatment G-CSF to treat the events.
Serious infectionsIn patients treated with Lunsumio intravenous infusion or subcutaneous injection, serious infections ofany grade occurred in 17% (60/357) of patients. Five (1.4%) of patients experienced serious infectionsconcurrently with grade 3-4 neutropenia. The median time to onset of first serious infection was92 days (range: 1-408 days), with median duration of 15.5 days (range: 2-174 days). Grade 5 eventsoccurred in 2.5% (9/357) of patients, which included COVID-19 pneumonia, COVID-19, pneumonia,septic shock and sepsis.
Immune Effector Cell-Associated Neurotoxicity Syndrome
Across a broader clinical trial population, Immune Effector Cell-Associated Neurotoxicity Syndrome(ICANS) occurred in 2.1% (20/949) of patients, 19 patients had Grade 1-2 events and 1 patient had
Grade 3 event. The majority of events occurred during the first cycle of treatment. The majority ofcases resolved. The median time to onset from initial dose was 17 days (range: 1 to 48 days). Themedian duration was 3 days (range: 1-20 days). Immune Effector Cell-Associated Encephalopathy(ICE) scoring was not systematically performed across the referenced trial population.
Tumour flareIn patients treated with Lunsumio intravenous infusion or subcutaneous injection, tumour flare(including pleural effusion and tumour inflammation) occurred in 3.1% (11/357) of patients, whichincluded 1.4% grade 2 and 1.4% grade 3 events. The median time to onset was 13 days (range2-84 days), and median duration was 36 days (range 15-105 days).
Tumour Lysis Syndrome (TLS)
In patients treated with Lunsumio intravenous infusion or subcutaneous injection, TLS occurred in0.6% (2/357) of patients, concurrent with CRS. One patient with follicular lymphoma was in theleukemic phase who experienced Grade 4 TLS. TLS onset was on days 2 and 24, and resolved within3 and 6 days, respectively.
Reporting of suspected adverse reactionsReporting suspected adverse reactions after authorisation of the medicinal product is important. Itallows continued monitoring of the benefit/risk balance of the medicinal product. Healthcareprofessionals are asked to report any suspected adverse reactions via the national reporting systemlisted in Appendix V.
In case of overdose, patients should be closely monitored for signs or symptoms of adverse reactions,and appropriate symptomatic treatment instituted.
Pharmacotherapeutic group: Antineoplastic agents; Other monoclonal antibodies and antibody drugconjugates, ATC code: L01FX25
Mechanism of actionMosunetuzumab is an anti-CD20/CD3 T-cell engaging bispecific antibody targeting CD20-expressing
B-cells. It is a conditional agonist; targeted B-cell killing is observed only upon simultaneous bindingto CD20 on B-cells and CD3 on T-cells. Engagement of both arms of mosunetuzumab results in theformation of an immunologic synapse between a target B-cell and a cytotoxic T cell leading to T-cellactivation. Subsequent directed release of perforin and granzymes from T-cell activation through theimmunologic synapsis induce B-cell lysis leading to cell death.
Lunsumio subcutaneous injection caused B-cell depletion (defined as CD19 B-cell counts < 5cells/uL) after the initial cycle of administration (by Cycle 2 Day 1) by both intravenous andsubcutaneous administration routes in a majority of patients (95.2% and 94.1% respectively) anddepletion was maintained throughout the duration of treatment.
Clinical efficacy and safetyAn open-label, multicenter, multi-cohort study (GO29781) was conducted to evaluate Lunsumio SC inpatients with relapsed or refractory B-cell non-Hodgkin's lymphoma. In the follicular lymphoma (FL)subcutaneous cohort (n=94), patients with relapsed or refractory FL (grade 1-3A) were required tohave received at least two prior systemic therapies, including an anti-CD20 monoclonal antibody andan alkylating agent.
The study excluded patients with active autoimmune disease, active infections (i.e. chronic active
EBV, acute or chronic hepatitis C, hepatitis B, HIV), progressive multifocal leukoencephalopathy, ahistory of CNS lymphoma, a history of macrophage activation syndrome/haemophagocyticlymphohistiocytosis, prior allogeneic stem cell transplant, or prior organ transplantation.
Patients received Lunsumio subcutaneously in a 21-day Cycle as follows:● Cycle 1 Day 1: 5 mg● Cycle 1 Day 8: 45 mg● Cycle 1 Day 15: 45 mg● Cycle 2 and beyond Day 1: 45 mg
The median number of cycles was 8, 63% received 8 cycles, and 14.9% received more than 8 cyclesup to 17 cycles.
The median age was 65 years (range 35 to 84 years) with 50% being > age 65, and 12.8% being ≥ age75. Fifty-six percent were male, 85% were white, 11% were Asian, 2% were Black, 100% had an
ECOG performance status of 0 or 1 and 25% of patients had bulky disease (at least one lesion > 6 cm).
The median number of prior therapies was 3 (range: 2-9), with 47% receiving 2 prior therapies, 19 %receiving 3 prior therapies and 34% receiving more than 3 prior therapies.
All patients received prior anti-CD20 and alkylator therapies, 20% received autologous stem celltransplant, 12% received PI3K inhibitors, 16% received prior rituximab plus lenalidomide therapy, and4% received CAR-T therapies. Sixty-seven percent of patients were refractory to prior anti-CD20monoclonal antibody therapy and 46% were refractory to both anti-CD20 monoclonal antibody andalkylator therapy. Sixty-three percent of patients were refractory to the last prior therapy and 44% hadprogression of disease within 24 months of first systemic therapy.
The primary objective in this cohort was to demonstrate pharmacokinetic non-inferiority (PKNI) of
Lunsumio subcutaneous injection compared to Lunsumio intravenous infusion based on the exposureendpoints of AUC0-84 days, and Ctrough(Cycle 3). The efficacy results are summarised in Table 7.
Table 7 Summary of efficacy in patients with relapsed/refractory FL
Efficacy parameter Lunsumio subcutaneous injection
N=94
Median observation time 20.7 months (range 1 - 34 months)
Complete response (CR), n (%), 55 (58.5)(95% CI) (47.9, 68.6)
Objective response rate (ORR), n (%) 70 (74.5)(95% CI) (64.4, 82.9)
Partial response (PR) n (%) 15 (16.0)(95% CI) (9.2, 25.0)
Duration of response (DOR)1 N=70
Patients with event, n (%) 26 (37.1)
Median, months (95% CI) 22.4 (16.8, 22.8)
K-M event-free proportion,
Efficacy parameter Lunsumio subcutaneous injection
N=9412 months 69.9(95% CI) (58.5, 81.4)18 months 59.6(95% CI) (45.8, 73.3)
Duration of complete response (DOCR)2 N=55
Patients with event, n (%) 19 (34.5)
Median, months (95% CI) 20.8 (18.8, NR)
K-M event-free proportion,12 months 72.4(95% CI) (59.9, 84.8)18 months 65.6(95% CI) (51.0, 80.2)
CI=confidence interval; K-M=Kaplan-Meier; NR=not reached.
Clinical Cut-off: 01 February 20241 DOR is defined as the time from the initial occurrence of a documented PR or CR until the patientexperiences an event (documented disease progression or death due to any cause, whichever occursfirst).2 DOCR is defined as the time from the initial occurrence of a documented CR until the patientexperiences an event (documented disease progression or death due to any cause, whichever occursfirst).
The median follow-up for DOR was 16.0 months. Additional exploratory efficacy outcomes includedthe median time to first response (2.8 months, range: 1-16) and the median time to first completeresponse (2.9 months, range: 1-14).
ImmunogenicityThe immunogenicity of mosunetuzumab was evaluated using an enzyme-linked immunosorbent assay(ELISA). No patients tested positive for anti-mosunetuzumab antibodies in 216 ADA-evaluablepatients who received Lunsumio single-agent subcutaneous treatments in Groups D and F of Study
GO27981. Based on the available information, the clinical relevance of anti-mosunetuzumabantibodies could not be assessed.
Paediatric populationThe European Medicines Agency has deferred the obligation to submit results of studies with
Lunsumio in one or more subsets of the paediatric population in treatment of mature B-cell neoplasms(see section 4.2 for information on paediatric use).
Conditional approvalThis medicinal product has been authorised under a so-called ‘conditional approval’ scheme. Thismeans that further evidence on this medicinal product is awaited. The European Medicines Agencywill review new information on this medicinal product at least every year and this SmPC will beupdated as necessary.
The Lunsumio subcutaneous monotherapy dosing regimen of 5/45/45 mg was found to bepharmokinetically non-inferior to the Lunsumio intravenous infusion 1/2/60/30 mg monotherapydosing regimen in relapsed or refractory follicular lymphoma patients with ≥ 2 prior therapies. Thesubcutaneous intravenous geometric mean ratio (90% CI) was 1.39 (1.20 - 1.61) for CtroughCYC3_OBS and1.06 (0.92 - 1.21) for AUC0-84.
Similar to Lunsumio intravenous infusion, Lunsumio subcutaneous injection pharmacokineticexposure increased in an approximately dose-proportional manner over the dose ranges studied. Ascompared to the intravenous route, the subcutaneous route maintained a high relative bioavailability,and had a slower absorption resulting in a lower Cmax, and delayed Tmax.
After the first cycle (i.e. 21 days) of the dosing with mosunetuzumab, the serum concentration reachesthe Cmax before the start of Cycle 2 Day 1 of the mosunetuzumab subcutaneous dosing regimen with anaverage maximum concentration of 3.81 µg/mL and %CV of 53.9%. Pharmacokinetic exposures aresummarized in Table 8.
Table 8 Exposure parameters of mosunetuzumab subcutaneous injection
Model-predicted Model-predicted Model-predicted
AUC (day·µg/mL)1 C 1 1max (µg/mL) Ctrough (µg/mL)
Cycle 1 (0 - 21 days) 36.7 (57.0) 3.81 (53.9) 3.45 (54.1)
Cycle 2 (21 - 42 days) 82.3 (50.9) 5.16 (50.3) 2.52 (55.7)
Steady-state2 72.8 (34.5) 4.40 (36.7) 2.41 (34.2)1 Values are geometric mean with geometric CV%2 Steady-state values are approximated at Cycle 4 (63 - 84 days)
AbsorptionLunsumio is administered subcutaneously. Tmax was reached around 4 to 7 days. Relativebioavailability (F) of the subcutaneous injection regimen relative to the intravenous infusion regimenat steady state was 0.898 (95% CI: 0.828 - 0.975).
DistributionThe population estimate of central volume of distribution for mosunetuzumab was 5.49 L withintravenous infusion and subcutaneous injection of Lunsumio. Because mosunetuzumab is anantibody, protein binding studies were not conducted.
BiotransformationThe metabolic pathway of mosunetuzumab has not been directly studied. Like other proteintherapeutics, mosunetuzumab is expected to be degraded into small peptides and amino acids viacatabolic pathways.
EliminationBased on a population pharmacokinetic analysis, when administered intravenously, the estimatedmean CLss and baseline clearance (CLbase) were 1.08 L/day and 0.584 L/day, respectively. Theterminal half-life for mosunetuzumab subcutaneous was 16.8 days at steady state based on populationpharmacokinetic PK model estimates.
ElderlyAge did not have an effect on the pharmacokinetics of mosunetuzumab based on a populationpharmacokinetic analysis with patients aged 18 - 88 years (n=228). No effect age related effect onsubcutaneous absorption of mosunetuzumab was observed for patients in this age groups.
BodyweightLike other therapeutic proteins, bodyweight was positively associated with mosunetuzumab estimatedclearance and volume of distribution. However, based on exposure-response analysis and clinicalexposure margins, considering the exposures in patients at either “low” (<50 kg) or “high” (≥112 kg)weight, no dose adjustment is required due to patient bodyweight.
GenderBased upon population pharmacokinetic analysis, steady-state clearance of mosunetuzumab ismarginally lower in females (~13%) compared to males. No dose adjustment is required due to gender,based on exposure-response analysis.
RaceRace (Asian vs. non-Asian) was not identified as a covariate influencing mosunetuzumabpharmacokinetics.
Renal impairmentNo dedicated studies have been conducted to determine the effect of renal impairment on thepharmacokinetics of mosunetuzumab. The renal elimination of intact mosunetuzumab, an IgGmonoclonal antibody, is expected to be low and of minor importance.
The population pharmacokinetic PK analysis of mosunetuzumab subcutaneous administration showedthat creatinine clearance (CrCl) does not affect pharmacokinetics of mosunetuzumab.
Pharmacokinetics of mosunetuzumab in patients with mild (CrCl 60 to 89 mL/min, n=92) or moderate(CrCl 30 to 59 mL/min, n=41) renal impairment were similar to those in patients with normal renalfunction (CrCl ≥ 90 mL/min, n=88). Pharmacokinetic data in patients with severe renal impairment(CrCl 15 to 29 mL/min) is limited (n=1), therefore no dose recommendations can be made. Lunsumiosubcutaneous injection was not studied in patients with end-stage renal disease and/or who are ondialysis.
Hepatic impairmentNo specific studies have been conducted to determine the effect of hepatic impairment on thepharmacokinetics of mosunetuzumab. IgGs are mainly eliminated via intracellular catabolism andhepatic impairment is not expected to influence clearance of mosunetuzumab.
The population PK analysis of mosunetuzumab showed that hepatic impairment does not affectpharmacokinetics of mosunetuzumab. Pharmacokinetics of mosunetuzumab in patients with mildhepatic impairment (total bilirubin > ULN to 1× x ULN or AST > ULN, n=35) were similar to those inpatients with normal hepatic function (n=191). The number of patients with moderate (totalbilirubin > 1.5-3 x ULN, any AST, n=1) or severe (total bilirubin >3-10 x ULN, any AST, n=2)hepatic impairment is limited.
Paediatric populationNo studies have been conducted to investigate the pharmacokinetics of mosunetuzumab in thepaediatric population (< 18 years old).
Key nonclinical findings with mosunetuzumab identified in single- and repeat-dose toxicity studies upto 26-weeks in duration included transient post-dose CRS primarily limited to the first dose,vascular/perivascular inflammatory cell infiltrates that were primarily in the CNS and infrequently inother organs that were likely secondary to cytokine release and immune cell activation, and increasedsusceptibility to infection following chronic dosing due to sustained B-cell depletion.
All of the findings were considered pharmacologically-mediated effects and reversible. Across studiesthere was a single incidence of convulsion in one animal at Cmax and AUC exposures (time-averagedover 7 days) of 3.3- and 1.8- fold higher, respectively, than those in patients receiving Lunsumio at therecommended dose and schedule in Study GO29781.
Impairment of fertilityAn assessment of the male and female reproductive organs was included in a 26-week chronic toxicitystudy in sexually mature cynomolgus monkeys administered by intravenous infusion. Mosunetuzumabhad no effect on either male or female reproductive organs at exposures (AUC) similar to exposure(AUC) in patients receiving the recommended dose.
Reproductive toxicityNo developmental toxicity studies in animals have been conducted with mosunetuzumab. Based onlow placental transfer of antibodies during the first trimester, the mechanism of action and availabledata of mosunetuzumab, and the data on the anti-CD20 antibody class, the risk for teratogenicity islow. Studies with mosunetuzumab in non-pregnant animals have demonstrated that prolonged B-celldepletion can lead to increased risk of opportunistic infection, which may cause foetal loss. Transient
CRS associated with Lunsumio administration may also be harmful to pregnancy.
L-histidine
L-methionine
Acetic acid (pH adjustment)
Sucrose
Polysorbate 20 (E 432)
Water for injections
No incompatibilities between Lunsumio Subcutaneous formulation and polypropylene orpolycarbonate syringe material or stainless- steel transfer and injection needles and polyethylene Luercone stoppers have been observed.
Unopened vial3 years
Prepared Syringe
Once transferred from the vial to the syringe, Lunsumio solution for injection should be injectedimmediately because the medicine does not contain any antimicrobial-preservative. If not usedimmediately, in-use storage times and conditions are the responsibility of the user and would normallynot be longer than 24 hours at 2-8°C, unless preparation has taken place in controlled and validatedaseptic conditions.
If Lunsumio solution for injection is transferred from the vial to the syringe in a controlled andvalidated aseptic conditions, the medicine in the capped syringe can be stored in the refrigerator at 2°Cto 8°C for up to 28 days protected from light and/or at 9°C to 30°C for up to 24 hours at ambient light.
Store in a refrigerator (2°C - 8°C).
Do not freeze.
Keep the vial in the outer carton in order to protect from light.
For storage conditions, see section 6.3.
5 mg solution for injection
Type I glass-vial with a fluororesin-laminated rubber stopper and an aluminium seal with a plasticbrown flip-off cap containing 5 mg of solution for injection.
Pack of one vial.
45 mg solution for injection
Type I glass-vial with a fluororesin-laminated rubber stopper and an aluminium seal with a plasticlavender flip-off cap containing 45 mg of solution for injection.
Pack of one vial.
General precaution
To prevent medication errors, check the vial labels to ensure that the drug being prepared andadministered is Lunsumio for subcutaneous injection and not Lunsumio for intravenous infusion.
Lunsumio contains no preservative and is intended for single-dose only. Proper aseptic techniquethroughout the handling of this medicinal product should be followed. Do not shake.
Lunsumio subcutaneous injection should be inspected visually to ensure there is no particulate matteror discolouration prior to administration. The vial should be discarded if particulate matter is present.
Each Lunsumio vial is ready-to-use for one subcutaneous injection and should not be diluted. The
Lunsumio subcutaneous injection solution should be withdrawn using an appropriately sized transfernee (18G to 21G recommended). The transfer needle should be removed and an appropriately sizedinjection needle (25G to 30G recommended should be attached). The smallest syringe that canaccurately deliver the injection volume should be used.
The peel-off label from the leaflet should be applied to the syringe.
DisposalThe release of pharmaceuticals into the environment should be minimised. Medicinal products shouldnot be disposed of via wastewater and disposal through household waste should be avoided.
The following points should be strictly adhered to regarding the use and disposal of syringes and othermedicinal sharps:● Needles and syringes should never be reused.
● Place all used needles and syringes into a sharps container (puncture-proof disposablecontainer).
Any unused medicinal product or waste material should be disposed of in accordance with localrequirements
Detailed information on this medicinal product is available on the website of the European Medicines
Agency https://www.ema.europa.eu.