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Managing Infusion Pain in Children With Neuroblastoma
INDICATION DANYELZA is indicated, in combination with granulocyte-macrophage colony-stimulating factor (GM-CSF), for the treatment of pediatric patients 1 year of age and older and adult patients with relapsed or refractory high-risk neuroblastoma in the bone or bone marrow who have demonstrated a partiaI response, minor response, or stable disease to prior therapy.
This indication is approved under accelerated approval based on overalI response rate and duration of response. Continued approval for this indication may be contingent upon verification and description of clinical benefit in a confirmatory trial(s).

Managing Infusion-Related Pain in Anti-GD2 Therapy: Evidence-Based Approaches

​Managing neuroblastoma pain in children receiving anti-GD2 therapy is a defining clinical challenge across the treatment cycle. Pain reflects antibody engagement with GD2 on peripheral nerve tissue and occurs frequently across studies. Institutional protocols address the expected pattern through premedication, scheduled analgesia, and coordinated infusion monitoring at the treating center.

Evidence-based pain management supports patient tolerance, cycle throughput, and family experience across the recommended treatment course. Each element of the protocol targets a specific mechanism observed in the DANYELZA clinical program. Understanding both the mechanism and the protocol design supports reliable delivery across pediatric oncology institutions.

What Are the Approaches to Managing Neuroblastoma Pain in Children on Anti-GD2 Therapy?

Managing neuroblastoma pain in children on anti-GD2 therapy relies on a coordinated, multimodal protocol of scheduled premedication and analgesia. Opioids precede each infusion within a defined window, and ketamine is added alongside opioids for pain not fully controlled by opioid analgesia alone. A 12-day gabapentin course spans Day -4 through Day 7 to round out the multimodal approach. Institutional nursing monitors patients throughout each infusion and observation period to support dose adjustment as needed.

Why Anti-GD2 Therapy Causes Infusion Pain in Children With Neuroblastoma

Pain during anti-GD2 infusion reflects antibody engagement with GD2 on peripheral nerve tissue across the infusion window. Consequently, the pain profile is expected rather than incidental across the treated population. Moreover, GD2 is a disialoganglioside overexpressed on neuroblastoma cells and also present on central and peripheral nerves.

The distribution across tumor and nerve tissue explains the pain profile characteristic of anti-GD2 therapy. Specifically, any-grade pain occurred in 94 to 100 percent of patients across the studies supporting DANYELZA approval. In addition, Grade 3 pain occurred in 72 percent of patients in the Study 201 population.

Notably, most Grade 3 pain in the Study 201 pre-specified interim analysis resolved within five hours of onset. Managing neuroblastoma pain in children on anti-GD2 therapy therefore requires anticipation rather than reaction across each cycle. As a result, premedication and analgesia protocols address the expected mechanism at the point of infusion.

The mechanism informs both premedication design and nursing monitoring across the infusion window. Ultimately, understanding the neural GD2 connection shapes how teams communicate expectations with patients and families across the treated population.

Premedication Strategies for Managing Infusion Pain in Children With Neuroblastoma

Premedication for managing neuroblastoma pain in children on anti-GD2 therapy relies on a coordinated protocol of scheduled agents. Specifically, each element addresses a specific aspect of the expected pain mechanism during antibody engagement. Institutional protocols align timing across pharmacy, nursing, and physician teams for reliable execution across cycles.

Notably, timing across the pre-infusion window matters as much as agent selection for consistent tolerance across cycles. Furthermore, coordination between pharmacy, nursing, and physician teams supports reliable execution at the treating institution. Institutional protocols capture the full premedication sequence for repeatable delivery across the treated population.

Nursing Monitoring and Pain Response During Anti-GD2 Therapy

Nursing monitoring during anti-GD2 therapy anchors pain response across each infusion and observation period at the treating center. Specifically, staff trained in GD2-directed antibody delivery observe patients throughout the infusion and for at least two hours after. Consequently, continuous assessment supports timely dose adjustment of analgesia and identification of Grade 3 pain episodes.

Pain response protocols include additional opioid dosing, infusion rate adjustment, and infusion interruption when indicated. Moreover, institutional standing orders enable rapid response without waiting for physician re-authorization at each event. As a result, the approach reduces time to symptom control across the treated population.

Documentation of pain scores, interventions, and resolution supports individual patient management and institutional protocol refinement across cycles. Furthermore, consistent records feed cycle-to-cycle care planning and support family communication across the treatment course.

Managing neuroblastoma pain in children through active nursing monitoring reflects the operational reality of DANYELZA delivery. Ultimately, institutional readiness for pain response remains central to safe outpatient administration across US treating centers.

Institutional Protocols for Neuroblastoma Pain Management in Children

Institutional protocols for pediatric neuroblastoma pain management combine scheduled premedication, standing analgesia orders, and coordinated monitoring. Specifically, programs delivering DANYELZA operationalize each element across pharmacy, nursing, and physician workflows at the treating center. Managing neuroblastoma pain in children, therefore, requires each protocol layer working together across the infusion cycle.

Opioid and Ketamine Analgesia Timing and Selection

Opioid analgesia is administered 60 to 45 minutes before each DANYELZA infusion to address expected pain during antibody engagement. Ketamine is given alongside opioids in the same pre-infusion window for pain not fully controlled by opioid analgesia alone. Furthermore, institutional selection accounts for patient age, prior opioid exposure, and expected infusion duration across the cycle. Consequently, standing orders support consistent timing across staff shifts at the treating center.

Gabapentin Course Coordination Across Cycles

A 12-day gabapentin course spans Day -4 through Day 7 of each cycle to support neuropathic pain control. Specifically, institutional protocols align the gabapentin start with GM-CSF initiation for streamlined patient education across the family. As a result, family adherence support anchors consistent delivery across the multi-day cycle rhythm.

IV Corticosteroid Administration at Cycle Start

IV corticosteroids precede the first infusion of each cycle to reduce reaction severity across the treated population. Notably, timing sits within the broader premedication window alongside antihistamine and antiemetic coverage. Moreover, institutional pharmacy workflows support reliable preparation across the cycle rhythm.

Acetaminophen and Adjunct Premedication

Acetaminophen is included in the pre-infusion premedication window alongside antihistamine, H2 antagonist, and antiemetic agents. Specifically, the combination addresses the overlapping pain and infusion-related reaction profiles observed across the treated population. Consequently, standing premedication orders support consistent execution across staff and shifts.

Nursing Observation and Response Windows

Nursing observation continues throughout each infusion and for at least two hours after each dose across the outpatient setting. Furthermore, standing orders enable additional analgesic dosing and adjustment of infusion rates without waiting for physician re-authorization. Ultimately, consistent response protocols support safe discharge across the outpatient administration setting today.

Partner With SERB to Support Your Pediatric Neuroblastoma Pain Management Program

Managing neuroblastoma pain in children on anti-GD2 therapy reflects a coordinated protocol built around the mechanism of infusion pain. Specifically, premedication, standing analgesia orders, and nursing monitoring together enable consistent pain response across cycles. Each protocol element supports patient tolerance and cycle throughput at the treating institution.

Institutional readiness for pain management supports both safe outpatient administration and family experience across the treatment course. Furthermore, consistent protocols reduce time to symptom control across the treated population. Reach out to SERB for clinical resources that support your pediatric neuroblastoma pain management program.

Sources

  1. DANYELZA (naxitamab-gqgk) Prescribing Information. Y-mAbs Therapeutics, Inc.; 2024.

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CR=complete response; MIBG=meta-iodobenzylguanidine.

References: 1. Park JR, Bagatell R, Cohn SL, et al. J Clin Oncol. 2017;35(22):2580-2587. 2. DuBois SG, Kalika Y, Lukens JN, et al. J Pediatr Hematol Oncol. 1999;21(3):181-189.
3. Garaventa A, Poetschger U,Valteau-Couanet D, et al. J Clin Oncol. 2021;39(23):2552-2563. 4. Pinto N, Naranjo A, Hibbitts E, et al. Eur J Cancer. 2019;112:66-79. 5. Yanik GA, Parisi MT, Naranjo A, et al. J Nucl Med. 2018;59:502-508. 6. Yanik GA, Parisi MT, Shulkin BL, et al. J Nucl Med. 2013;54(4):541-548. 7. Streby KA, Parisi MT, Shulkin BL, et al. Pediatr Blood Cancer. 2023;70(8):e30418.

References: 1. DANYELZA® [package insert]. New York, NY: Y-mAbs Therapeutics, Inc.; 2024. 2. Data on file. Y-mAbs Therapeutics, Inc.

References: 1. Data on file. Y-mAbs Therapeutics, Inc. 2. DANYELZA® [package insert]. New York, NY: Y-mAbs Therapeutics, Inc.; 2024.

Reference: 1. Data on file. Y-mAbs Therapeutics, Inc.

References: 1. DANYELZA® [package insert]. New York, NY: Y-mAbs Therapeutics, Inc.; 2024. 2. Data on file. Y-mAbs Therapeutics, Inc. 3. NIH US National Library of Medicine. https://clinicaltrials.gov/ct2/ show/NCT01419834?term=NCT01419834&draw=2&rank=1. Accessed April 22, 2024.

References: 1. DANYELZA® [package insert]. New York, NY: Y-mAbs Therapeutics, Inc.; 2024. 2. Data on file. Y-mAbs Therapeutics, Inc.

References: 1. Yanik GA, Parisi MT, Shulkin BL, et al. J Nucl Med. 2013;54(4):541-548. 2. Yanik GA, Parisi MT, Naranjo A, et al. J Nucl Med. 2018;59:502-508. 3. Streby KA, Parisi MT, Shulkin BL, et al. Pediatr Blood Cancer. 2023;e30418. https://doi.org/10.1002/pbc.30418. 4. DANYELZA® [package insert]. New York, NY: Y-mAbs Therapeutics, Inc; 2024.

References: 1. DANYELZA® [package insert]. New York, NY: Y-mAbs Therapeutics, Inc.; 2024. 2. Lisby S, Liebenberg N, Bukrinski J, et al. Presented at the SIOP virtual congress. Abstract #945. October 16, 2020. 3. Cheung N-KV, Guo H, Hu J, et al. Oncoimmunology. 2012;1(4):477-486.

References: 1. Data on file. Y-mAbs Therapeutics, Inc. 2. DANYELZA® [package insert]. New York, NY: Y-mAbs Therapeutics, Inc.; 2024.

References: 1. DANYELZA® [package insert]. New York, NY: Y-mAbs Therapeutics, Inc.; 2024. 2. Data on file. Y-mAbs Therapeutics, Inc.

References: 1. DANYELZA® [package insert]. New York, NY: Y-mAbs Therapeutics, Inc.; 2024. 2. Data on file. Y-mAbs Therapeutics, Inc.

IMPORTANT SAFETY INFORMATION and INDICATION

WARNING: SERIOUS INFUSION-RELATED REACTIONS and NEUROTOXICITY

Serious Infusion-Related Reactions

  • DANYELZA can cause serious infusion reactions, including cardiac arrest, anaphylaxis, hypotension, bronchospasm, and stridor. lnfusion reactions of any Grade occurred in 94-100% of patients. Severe infusion reactions occurred in 32-68% and serious infusion reactions occurred in 4-18% of patients in DANYELZA clinical studies.
  • Premedicate prior to each DANYELZA infusion as recommended and monitor patients for at least 2 hours following completion of each infusion. Reduce the rate, interrupt infusion, or permanently discontinue DANYELZA based on severity.
  • Neurotoxicity

  • DANYELZA can cause severe neurotoxicity, including severe neuropathic pain, transverse myelitis and reversible posterior leukoencephalopathy syndrome (RPLS). Pain of any Grade occurred in 94-100% of patients in DANYELZA clinical studies.
  • Premedicate to treat neuropathic pain as recommended. Permanently discontinue DANYELZA based on the adverse reaction and severity.
CONTRAINDICATION

DANYELZA is contraindicated in patients with a history of severe hypersensitivity reaction to naxitamab-gqgk. Reactions have included anaphylaxis.

WARNINGS AND PRECAUTIONS
Serious Infusion-Related Reactions

DANYELZA can cause serious infusion reactions requiring urgent intervention including fluid resuscitation, administration of bronchodilators and corticosteroids, intensive care unit admission, infusion rate reduction or interruption of DANYELZA infusion. Infusion-related reactions included hypotension, bronchospasm, hypoxia, and stridor.

Serious infusion-related reactions occurred in 4% of patients in Study 201 and in 18% of patients in Study 12-230. Infusion-related reactions of any Grade occurred in 100% of patients in Study 201 and 94% of patients in Study 12-230. Hypotension of any grade occurred in 100% of patients in Study 201 and 89% of patients in Study 12-230.

In Study 201, 68% of patients experienced Grade 3 or 4 infusion reactions; and in Study 12-230, 32% of patients experienced Grade 3 or 4 infusion reactions. Anaphylaxis occurred in 12% of patients and two patients (8%) permanently discontinued DANYELZA due to anaphylaxis in Study 201. One patient in Study 12-230 (1.4%) experienced a Grade 4 cardiac arrest 1.5 hours following completion of DANYELZA infusion.

In Study 201, infusion reactions generally occurred within 24 hours of completing a DANYELZA infusion, most often within 30 minutes of initiation. Infusion reactions were most frequent during the first infusion of DANYELZA in each cycle. Eighty percent of patients required reduction in infusion rate and 80% of patients had an infusion interrupted for at least one infusion-related reaction.

Caution is advised in patients with pre-existing cardiac disease, as this may exacerbate the risk of severe hypotension.

Premedicate with an antihistamine, acetaminophen, an H2 antagonist and corticosteroid as recommended. Monitor patients closely for signs and symptoms of infusion reactions during and for at least 2 hours following completion of each DANYELZA infusion in a setting where cardiopulmonary resuscitation medication and equipment are available.

Reduce the rate, interrupt infusion, or permanently discontinue DANYELZA based on severity and institute appropriate medical management as needed.

Neurotoxicity

DANYELZA can cause severe neurotoxicity, including severe neuropathic pain, transverse myelitis, and reversible posterior leukoencephalopathy syndrome.

Pain
Pain, including abdominal pain, bone pain, neck pain, and extremity pain, occurred in 100% of patients in Study 201 and 94% of patients in Study 12-230. Grade 3 pain occurred in 72% of patients in Study 201. One patient in Study 201 (4%) required interruption of an infusion due to pain. Pain typically began during the infusion of DANYELZA and lasted a median of less than one day in Study 201 (range less than one day and up to 62 days).

Premedicate with drugs that treat neuropathic pain (e.g., gabapentin) and oral opioids. Administer intravenous opioids as needed for breakthrough pain. Permanently discontinue DANYELZA based on severity.

Transverse Myelitis
Transverse myelitis has occurred with DANYELZA. Permanently discontinue DANYELZA in patients who develop transverse myelitis.

Reversible Posterior Leukoencephalopathy Syndrome (RPLS)
Reversible posterior leukoencephalopathy syndrome (RPLS) (also known as posterior reversible encephalopathy syndrome or PRES) occurred in 2 (2.8%) patients in Study 12-230. Events occurred 2 and 7 days following completion of the first cycle of DANYELZA. Monitor blood pressure during and following DANYELZA infusion and assess for neurologic symptoms. Permanently discontinue DANYELZA in case of symptomatic RPLS.

Peripheral Neuropathy
Peripheral neuropathy, including peripheral sensory neuropathy, peripheral motor neuropathy, paresthesia, and neuralgia, occurred in 32% of patients in Study 201 and in 25% of patients in Study 12-230. Most signs and symptoms of neuropathy began on the day of the infusion and neuropathy lasted a median of 5.5 days (range 0 to 22 days) in Study 201 and 0 days (range 0 to 22 days) in Study 12-230.

Permanently discontinue DANYELZA based on severity.

Neurological Disorders of the Eye
Neurological disorders of the eye including unequal pupils, blurred vision, accommodation disorder, mydriasis, visual impairment, and photophobia occurred in 24% of patients in Study 201 and 19% of patients in Study 12-230. Neurological disorders of the eye lasted a median of 17 days (range 0 to 84 days) in Study 201 with two patients (8%) experiencing an event that had not resolved at the time of data cutoff, and a median of 1 day (range less than one day to 21 days) in Study 12-230. Permanently discontinue DANYELZA based on severity.

Prolonged Urinary Retention
Urinary retention occurred in 1 (4%) patient in Study 201 and in 3 patients (4%) in Study 12-230. All events in both studies occurred on the day of an infusion of DANYELZA and lasted between 0 and 24 days. Permanently discontinue DANYELZA in patients with urinary retention that does not resolve following discontinuation of opioids.

Myocarditis

Myocarditis has occurred in adolescent patients receiving DANYELZA in clinical trials and expanded access programs. Myocarditis occurred within days of receiving DANYELZA requiring drug interruption. Monitor for signs and symptoms of myocarditis during treatment with DANYELZA. Withhold, reduce the dose, or permanently discontinue DANYELZA based on severity.

Hypertension

Hypertension occurred in 44% of patients in Study 201 and 28% of patients in Study 12-230 who received DANYELZA. Grade 3 or 4 hypertension occurred in 4% of patients in Study 201 and 7% of patients in Study 12-230. Four patients (6%) in Study 12-230 permanently discontinued DANYELZA due to hypertension. In both studies, most events occurred on the day of DANYELZA infusion and occurred up to 9 days following an infusion of DANYELZA.

Do not initiate DANYELZA in patients with uncontrolled hypertension. Monitor blood pressure during infusion, and at least daily on Days 1 to 8 of each cycle of DANYELZA and evaluate for complications of hypertension including RPLS. Interrupt DANYELZA infusion and resume at a reduced rate, or permanently discontinue DANYELZA based on the severity.

Orthostatic Hypotension

Orthostatic hypotension has occurred in patients receiving DANYELZA in clinical trials and expanded access programs. Severe orthostatic hypotension, including cases requiring hospitalization, have occurred. Cases occurred within hours to 6 days of DANYELZA infusions in any cycle.

In patients with symptoms of orthostatic hypotension, monitor postural blood pressure prior to initiating treatment with DANYELZA and as clinically indicated with subsequent dosing. Withhold, reduce dose, or permanently discontinue DANYELZA based on severity.

Embryo-Fetal Toxicity

Based on its mechanism of action, DANYELZA may cause fetal harm when administered to a pregnant woman. Advise females of reproductive potential, including pregnant women, of the potential risk to a fetus. Advise females of reproductive potential to use effective contraceptive during treatment with DANYELZA and for two months after the last dose.

ADVERSE REACTIONS

The most common adverse reactions in Studies 201 and 12-230 (≥25% in either study) were infusion-related reaction, pain, tachycardia, vomiting, cough, nausea, diarrhea, decreased appetite, hypertension, fatigue, erythema multiforme, peripheral neuropathy, urticaria, pyrexia, headache, injection site reaction, edema, anxiety, localized edema and irritability. The most common Grade 3 or 4 laboratory abnormalities (≥5% in either study) were decreased lymphocytes, decreased neutrophils, decreased hemoglobin, decreased platelet count, decreased potassium, increased alanine aminotransferase, decreased glucose, decreased calcium, decreased albumin, decreased sodium and decreased phosphate.

INDICATION

DANYELZA is indicated, in combination with granulocyte-macrophage colony-stimulating factor (GM-CSF), for the treatment of pediatric patients 1 year of age and older and adult patients with relapsed or refractory high-risk neuroblastoma in the bone or bone marrow who have demonstrated a partial response, minor response, or stable disease to prior therapy.This indication is approved under accelerated approval based on overall response rate and duration of response. Continued approval for this indication may be contingent upon verification and description of clinical benefit in a confirmatory trial(s).

Please see full Prescribing Information and Patient Information for DANYELZA including Boxed Warning on serious infusion-related reactions and neurotoxicity.

References: 1. DANYELZA® [package insert]. New York, NY: Y-mAbs Therapeutics, Inc.; 2024.
2. Data on file. Y-mAbs Therapeutics, Inc.

References: 1. Data on file. Y-mAbs Therapeutics, Inc. 2. DANYELZA® [package insert]. New York, NY: Y-mAbs Therapeutics, Inc.; 2024. Available online at https://labeling.ymabs.com/danyelza. 3. Smith V, Foster J. High-risk neuroblastoma treatment review. Children (Basel). 2018;5(9):114. 4. Ahmed A, Zhang L, Reddivalla N, Hetherington M. Neuroblastoma in children: update on clinicopathologic and genetic prognostic factors. Pediatr Hematol Oncol. 2017;34(3):165-185. 5. London W, Castel V, Monclair T, et al. Clinical and biologic features predictive of survival after relapse of neuroblastoma: a report from International Neuroblastoma Risk Group project. J Clin Oncol. 2011;29(24):3286-3292.

References: 1. DANYELZA® [package insert]. New York, NY: Y-mAbs Therapeutics, Inc.; 2024. Available online at https://labeling.ymabs.com/danyelza. 2. National Cancer Institute. Published November 27, 2017. Accessed May 17, 2021. Common Terminology Criteria for Adverse Events (CTCAE) Version 5.0. https://ctep.cancer.gov/protocolDevelopment/electronic_applications/docs/CTCAE_v5_Quick_Reference_8.5x11.pdf

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