Talvey (talquetamab-tgvs)

Antineoplastic - Immunotherapy, T-cell Engager Subcutaneous Vial (Ml)

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Last reviewed · Source: First Databank (FDB) drug data

Overview

Talquetamab-tgvs, a humanized IgG4 bispecific G protein-coupled receptor class C group 5 member D (GPRC5D)-directed CD3 T-cell engager, is an antineoplastic agent.

Talquetamab-tgvs is a humanized IgG4 bispecific T-cell engaging antibody that binds to the CD3 receptor and G protein-coupled receptor class C group 5 member D (GPRC5D). The CD3 receptor is expressed on the surface of T-cells, and GPRC5D is expressed on the surface of multiple myeloma cells and benign plasma cells, in addition to healthy tissues such as epithelial cells in keratinized tissues of the skin and tongue.

In vitro data indicate that talquetamab-tgvs activates T-cells to cause the release of proinflammatory cytokines, leading to the lysis of multiple myeloma cells. Serum concentrations of cytokines (IL-6, IL-10, TNF-alpha, and IFN-gamma) and IL-2R were measured before and after administration of each step-up dose of talquetamab-tgvs, the first 3 treatment doses at 0.4 mg/kg once weekly, and the first 2 treatment doses at 0.8 mg/kg every two weeks. Increased concentrations of IL-6, IL-10, and IL-2R were observed during this period.

Anti-tumor activity was observed with talquetamab-tgvs in mouse models of multiple myeloma.

The peak plasma concentration and AUC of talquetamab-tgvs increase proportionally over the subcutaneous dosage range of 0.005--0.8 mg/kg weekly (0.01--2 times the recommended 0.4 mg/kg weekly treatment dose) and 0.8--1.2 mg/kg every 2 weeks (1--1.5 times the recommended 0.8 mg/kg every 2 weeks treatment dose). For both the weekly and biweekly (every 2 weeks) treatment regimens, 90% of steady-state exposure was achieved 16 weeks following the first treatment dose. Higher talquetamab-tgvs exposures (AUC and peak plasma concentrations) are associated with higher incidence of some adverse effects (e.g., oral toxicity, nail toxicity, and skin reactions); the exposure-response relationships for the effectiveness and the time course of pharmacodynamic response of talquetamab-tgvs have not been fully characterized.

Following subcutaneous administration, the geometric mean bioavailability of talquetamab-tgvs is 59%. The median time to the peak plasma concentration of talquetamab-tgvs following the first and the 17th treatment dose (0.4 mg/kg once weekly) was 3.7 and 2.5 days, respectively. The median time to the peak plasma concentration of talquetamab-tgvs following the first and the 9th treatment dose (0.8 mg/kg every 2 weeks) was 3.4 and 3.6 days, respectively.

Talquetamab-tgvs is expected to undergo metabolism via catabolic pathways into small peptides. The clearance of talquetamab-tgvs decreases over time, with a mean maximal reduction of 40% from the first treatment dose to 16 weeks after the first treatment dose. The mean elimination half-life of talquetamab-tgvs is 8.4 days after the first treatment dose and 12.2 days at 16 weeks after the first treatment dose.

The volume of distribution and clearance of talquetamab-tgvs increased with increasing bodyweight (40-143 kg). No clinically important differences in the pharmacokinetics of talquetamab-tgvs have been identified based on age (33--86 years), sex, race (white, Black, or African American), or ethnicity (not Hispanic/Latino or Hispanic/Latino).

USES: This medication is used to treat a certain type of cancer (multiple myeloma). Talquetamab works by slowing or stopping the growth of cancer cells.

Generic name: talquetamab-tgvs
Drug class: Antineoplastic - Immunotherapy, T-cell Engager
Therapeutic class: Antineoplastics

Reference product & biosimilars

No reference, biosimilar or interchangeable associated with this drug.

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Indications

The following indications are listed for Talvey:

  • Multiple Myeloma

Also known as: Plasma Cell Myeloma.

Dosing

Dosage delays of talquetamab-tgvs may be necessary for the management of toxicities.

Refer to Table 3 for recommendations on the management of CRS with talquetamab-tgvs. Identify CRS based on clinical presentation. Evaluate and treat other causes of fever, hypoxia, and hypotension. If there is suspicion for CRS, withhold talquetamab-tgvs until resolution of CRS or permanently discontinue the drug based on the severity of the reaction. Manage in accordance with the recommendations in Table 3, and consider further management per current clinical practice guidelines. Administer supportive therapy for CRS, which may include intensive care for severe or life-threatening CRS. Consider laboratory testing to monitor for disseminated intravascular coagulation and hematologic parameters, in addition to pulmonary, cardiac, renal, and hepatic function.

Table 3. Recommendations for Management of CRS

Grade Presenting Symptoms Recommendations Grade 1 Temperature >=38degreesC Withhold (fever may not always be talquetamab-tgvs until present concurrently CRS resolves Give with hypotension or pretreatment medications hypoxia since it may be prior to the next dose masked by interventions of talquetamab-tgvs such as antipyretics or anticytokine therapy (e.g., corticosteroids)) Grade 2 Temperature >=38degreesC Withhold (fever may not always be talquetamab-tgvs until present concurrently CRS resolves Give with hypotension or pretreatment medications hypoxia since it may be prior to the next dose masked by interventions of talquetamab-tgvs such as antipyretics or Hospitalize patients for anticytokine therapy 48 hours following the (e.g., next dose of corticosteroids)), in talquetamab-tgvs addition to either: Grade 3 Temperature >=38degreesC Duration <48 hours: (fever may not always be Recurrent CRS or present concurrently duration >=48 hours: with hypotension or hypoxia since it may be masked by interventions such as antipyretics or anticytokine therapy (e.g., corticosteroids)), in addition to either: Grade 4 Temperature >=38degreesC Permanently discontinue (fever may not always be talquetamab-tgvs Provide present concurrently supportive therapy (may with hypotension or include intensive care) hypoxia since it may be masked by interventions such as antipyretics or anticytokine therapy (e.g., corticosteroids)), in addition to either:

See Table 7 and Table 8 for recommendations on restarting talquetamab-tgvs after dosage delays due to adverse reactions.

Refer to Tables 4 and 5 for recommendations on the management of ICANS and neurologic toxicity (excluding ICANS) with talquetamab-tgvs, respectively. At the first sign of neurologic toxicity (including ICANS), withhold talquetamab-tgvs and consider neurologic evaluation. Rule out other causes of neurologic symptoms. Provide supportive therapy (including intensive care if needed) for severe and life-threatening neurologic toxicities, including ICANS. Manage ICANS and neurologic toxicity in accordance with recommendations in Table 4 and Table 5, and consider further management per current practice guidelines.

Table 4. Recommendations for Management of ICANS

Grade Presenting Symptoms Recommendations Grade 1 Immune Effector-Cell Withold talquetamab-tgvs Encephalopathy (ICE) until ICANS resolves Assessment score 7--9, Monitor neurologic OR Depressed level of symptoms; consider consciousness (not consultation with attributable to other neurologist/other causes): spontaneous specialists for further awakening evaluation and management Consider administration of seizure prophylaxis medications that are nonsedating (e.g. , levetiracetam) Grade 2 ICE score 3--6, OR Withold talquetamab-tgvs Depressed level of until ICANS resolves consciousness (not Give dexamethasone (or attributable to other equivalent) 10 mg IV causes): awakens to every 6 hours until voice resolution to grade 1 or lower, then taper Monitor neurologic symptoms; consider consultation with neurologist/other specialists for further eval uation and management Consider administration of seizure prophylaxis medications that are nonsedating (e.g., levetiracetam) Hospitalize patients for 48 hours following the next dose of talquetamab-tgvs Grade 3 ICE score 0--2 (if ICE score of 0, but arousable (e.g., awake with global aphasia)) and able to perform assessment, OR Depressed level of consciousness (not attributable to other causes): awakens only to tactile stimulus, OR Presence of seizure (not attri butable to other First occurrence of causes), either clinical grade 3 ICANS: seizure, focal or Recurrent grade 3 ICANS: generalized, that resolves quickly or nonconvulsive seizures detectable on EEG that resolve with intervention, OR Increased intracranial pressure (not attributable to other causes): focal/localiz ed edema on neuroimaging Grade 4 ICE score 0 (unarousable and unable to perform assessment), OR Depressed level of consciousness (not attributable to other causes): either unarousable or requiring vigorous/repetitive tactile stimuli to arouse, or coma/stupor, OR Presence of seizures (not attributable to other Permanently discontinue causes), either: talquetamab-tgvs Give life-threatening, dexamethasone (or prolonged seizure equivalent) 10 mg IV (lasting >5 minutes) or every 6 hours until repetitive resolution to grade 1 clinical/electrical or lower, then taper; seizures without return alternately, may give to baseline between methylprednisolone 1000 seizures), OR Motor mg IV daily for 2 or findings (not more days Monitor attributable to other neurologic symptoms causes): deep focal motor weakness such as ; consider consultation hemiparesis or with neurologist/other paraparesis, OR specialists for further Increased intracranial evaluation and pressure/cerebral edema management Consider (not attributable to administration of other causes) with signs seizure prophylaxis and symptoms such as: medications that are nonsedating (e.g., levetiracetam) Provide supportive therapy (including intensive care if needed)

Management is determined by the most severe event, not attributable to any other cause.

If arousable and able to perform the ICE Assessment, assess: orientation (oriented to year, month, city, hospital = 4 points); naming (name 3 objects (e.g., point to clock, pen, button) = 3 points); following commands (e.g., &quot;show me 2 fingers&quot; or &quot;close your eyes and stick out your tongue&quot; = 1 point); writing (ability to write a standard sentence = 1 point); and attention (counting backwards from 100 by 10 = 1 point). If the patient is unarousable and is unable to perform the ICE assessment (Grade 4 ICANS) = 0 points.

Table 5. Recommendations for Management of Neurologic Toxicity, Excluding ICANS

Severity of Neurologic Toxicity Recommendations (excluding ICANS) Grade 1 Withhold talquetamab-tgvs until neurologic symptoms resolve or stabilize Grade 2 or grade 3 (first Withhold talquetamab-tgvs until occurrence) neurologic symptoms improve to grade 1 or lower Provide supportive therapy Grade 3 (recurrent) or grade 4 Permanently discontinue talquetamab-tgvs Provide supportive therapy (including intensive care if needed)

Refer to Table 6 for dosage modification recommendations for other adverse reactions that may occur, including oral toxicity and weight loss, infections, cytopenias, skin reactions, and other non-hematologic adverse reactions.

Table 6. Dosage Modification Recommendations for Other Adverse Reactions

Adverse Reaction Severity Recommendations Oral toxicity and weight Grade 1--2 Provide supportive care, loss and consider withholding talquetamab-tgvs if not responsive to supportive care Oral toxicity and weight Grade 3 Withhold loss talquetamab-tgvs until resolution to grade 1 or better, and provide supportive care Oral toxicity and weight Grade 4 Permanently discontinue loss talquetamab-tgvs Infections All grades Withhold talquetamab-tgvs during the step-up dosing schedule until the infection resolves Infections Grade 3 Withhold talquetamab-tgvs during the treatment phase until the infection improves to grade 1 or better within 28 days Infections Grade 4 Consider permanently discontinuing talquetamab-tgvs If talquetamab-tgvs is not permanently discontinued, withhold subsequent talquetamab-tgvs treatment doses (i.e., doses given after step-up dosing schedule) until infection improves to grade 1 or better Cytopenias Absolute neutrophil Withhold acount (ANC) <500/mm3 talquetamab-tgvs until ANC >=500/mm3 Cytopenias Febrile neutropenia Withhold talquetamab-tgvs until ANC >=1000/mm3 and fever resolves Cytopenias Hemoglobin <8 g/dL Withhold talquetamab-tgvs until hemoglobin >=8 g/dL Cytopenias Platelets <25,000/mm3or Withhold platelets talquetamab-tgvs until 25,000--50,000/mm3 with platelets recover to bleeding >=25,000/mm3 and no evidence of bleeding Skin reactions Grade 3--4 Withhold talquetamab-tgvs until adverse reaction improves to grade 1 or baseline Other nonhematologic Grade 3 Withhold adverse reactions talquetamab-tgvs until adverse reaction improves to grade 1 or baseline Other nonhematologic Grade 4 Consider permanently adverse reactions discontinuing talquetamab-tgvs If talquetamab-tgvs is not permanently discontinued, withhold subsequent talquetamab-tgvs treatment doses (i.e., doses given after step-up dosing schedule) until adverse reaction improves to grade 1 or l ower

For grade 3--4 infection, if talquetamab-tgvs is withheld for >28 days, restart the step-up dosing schedule when infection improves to grade 1 or better.

Dosage delays of talquetamab-tgvs may be necessary for the management of toxicities. If there is a delay in dosage, restart talquetamab-tgvs and resume weekly dosing based on recommendations in Table 7 or biweekly (every 2 weeks) dosing based on recommendations in Table 8. If talquetamab-tgvs dosage is delayed for >28 days because of an adverse reaction, evaluate the benefits and risks of restarting treatment. Administer pretreatment medications prior to restarting talquetamab-tgvs and monitor patients following administration of talquetamab-tgvs.

Table 7. Recommmendations for Restarting Talquetamab-tgvs after Dosage Delay Based on Weekly Dosing Schedule

Last Dose Administered Time Elapsed Since Recommendation Administration of Last Dose 0.01 mg/kg >7 days Restart step-up dosing schedule at step-up dose 1 (0.01 mg/kg) 0.06 mg/kg 8--28 days Repeat step-up dose 2 (0.06 mg/kg) and continue step-up dosing schedule 0.06 mg/kg >28 days Restart step-up dosing schedule at step-up dose 1 (0.01 mg/kg) 0.4 mg/kg 8--28 days Continue dosing schedule at treatment dosage (0.4 mg/kg) 0.4 mg/kg 29--56 days Restart step-up dosing schedule at step-up dose 2 (0.06 mg/kg) 0.4 mg/kg >56 days Consider permanently discontinuing talquetamab-tgvs If the decision is made to restart talquetamab-tgvs, start the step-up dosing schedule at step-up dose 1 (0.01 mg/kg)

Administer premedications before restarting talquetamab-tgvs. Once talquetamab-tgvs is restarted, resume weekly dosing schedule accordingly.

Table 8. Recommmendations for Restarting Talquetamab-tgvs after Dosage Delay Based on Biweekly (Every 2 Weeks) Dosing Schedule

Last Dose Administered Time Elapsed Since Recommendation Administration of Last Dose 0.01 mg/kg >7 days Restart step-up dosing schedule at step-up dose 1 (0.01 mg/kg) 0.06 mg/kg 8--28 days Repeat step-up dose 2 (0.06 mg/kg), and continue step-up dosing schedule 0.06 mg/kg >28 days Restart step-up dosing schedule at step-up dose 1 (0.01 mg/kg) 0.4 mg/kg 8--28 days Repeat step-up dose 3 (0.4 mg/kg), and continue step-up dosing schedule 0.4 mg/kg 29--56 days Restart step-up dosing schedule at step-up dose 2 (0.06 mg/kg) 0.4 mg/kg >56 days Consider permanently discontinuing talquetamab-tgvs If the decision is made to restart talquetamab-tgvs, start the step-up dosing schedule at step-up dose 1 (0.01 mg/kg) 0.8 mg/kg 15--28 days Continue dosing schedule at treatment dosage (0.8 mg/kg) 0.8 mg/kg 29--56 days Restart step-up dosing schedule at step-up dose 3 (0.4 mg/kg) 0.8 mg/kg >56 days Consider permanently discontinuing talquetamab-tgvs If the decision is made to restart talquetamab-tgvs, start the step-up dosing schedule at step-up dose 1 (0.01 mg/kg)

Administer premedications before restarting talquetamab-tgvs. Once talquetamab-tgvs is restarted, resume biweekly dosing schedule accordingly.

Drug interactions

There is no enhanced messaging for this drug.

Contraindications

*None.

Adverse reactions

The most common adverse effects (incidence >=20%) of talquetamab-tgvs in clinical studies were pyrexia, CRS, dysgeusia, nail disorder, musculoskeletal pain, skin disorder, rash, fatigue, decreased weight, dry mouth, xerosis, dysphagia, upper respiratory tract infection, diarrhea, hypotension, and headache.

Precautions

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ICD codes

CodeTypeDescription
Multiple myeloma
C90.0ICD10CMMultiple myeloma
C90.00ICD10CMMultiple myeloma not having achieved remission
C90.02ICD10CMMultiple myeloma in relapse

ICD code information from First Databank (FDB).

Formulary status

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Last reviewed · Source: First Databank (FDB) drug data