Clinical Background
Blinotumomab
Acute lymphoblastic leukemia (ALL), also known as acute lymphocytic leukemia, is an aggressive, rapidly progressive blood cancer characterized by uncontrolled proliferation of abnormal, immature B- or T-lymphocytes leading to infiltration of bone marrow and other lymphoid organs.1 In 2021, there were an estimated 115,294 people in the United States living with ALL, and based on 2017-2021 data, the rate of new cases of ALL was 1.8 per 100,000 people per year;2 B-cell ALL (B-ALL) accounts for the majority of ALL cases (88% of cases in children and 75% of cases in adults).3,4 In addition to classification by the type of precursor cell, ALL is also characterized by cell surface protein expression (e.g., CD19 positive) and the presence or absence of genetic mutations (e.g., Philadelphia chromosome positive or negative), both of which play a role in risk stratification and treatment planning.1,3,5-7
The typical treatment for ALL involves a multi-phasic course (i.e., induction, consolidation, maintenance) of chemotherapy with or without the addition of other targeted drugs (e.g., immunotherapy) dependent upon the presence or absence of particular molecular biomarkers.3,8 Cure and survival rates for ALL have improved significantly over the past several decades, with a 5-year survival rate of 90% in newly diagnosed patients < 15 years of age; however, long-term survival rates are notably lower in adolescents, adults, and in relapsed disease.1,3,5,9,10 The aim of this summary of evidence is to examine the clinical literature supporting an indication expansion of blinatumomab for the treatment of CD19-positive, Philadelphia chromosome-negative, B-ALL during the consolidation phase of multiphase therapy in adults and pediatric patients one month or older.
Foslevodopa/Foscarbidopa
The Movement Disorder Society defines parkinsonism as bradykinesia, in combination with either rest tremor, rigidity, or both.11 The most common form of parkinsonism is Parkinson’s disease (PD), a slowly progressive neurodegenerative disease of adult-onset, caused by the loss of dopaminergic neurons in the substantia nigra.12-14 In addition to motor symptoms, non-motor features, such as cognitive decline, sleep disturbances, autonomic dysfunction, pain, and/or mood changes, are also present in many individuals with PD.11,14 Idiopathic Parkinson’s disease is heterogeneous in presentation and progression, and while the exact cause is unknown, it is thought to be multifactorial, and involve a combination of genetic susceptibility and environmental factors.14-20
The incidence of PD increases with age, with a notable rise after 65 years of age.17,21 In the Medicare population, age-standardized PD incidence has been estimated to be 212 per 100,000 person-years with an incidence rate of nearly 90,000 per year.21 Additionally, the prevalence rate of PD has increased more rapidly than other neurologic conditions.17,22 Based on a study conducted in 2017, an estimated 1 million people in the United States live with a diagnosis of PD, with 90% of this population being eligible for Medicare.23 The prevalence of PD in the United States is projected to increase to over 1.2 million individuals by 2030.24
There is no cure for Parkinson’s disease; however, pharmacologic treatments (e.g., oral levodopa/carbidopa, dopamine agonists, amantadine) and rehabilitation therapies (i.e., physical, occupational, speech), are available to help manage symptoms and improve quality of life (QoL).14 While levodopa is the most effective drug for the management of motor symptoms related to PD, the half-life of the drug is short, resulting in fluctuations in blood levels and, over time as PD advances, motor symptom control.25,26 Motor fluctuations are characterized by patients alternating between “on” states, when symptoms are well controlled, and “off” states, when tremor and/or rigidity reappear; the timing of these states may become unpredictable as PD advances.14,25 Motor complications are noted in up to 50% of patients within 2-5 years of dopaminergic therapy, and in 80-100% of patients after 10 years.25 Newer delivery systems and formulations of levodopa have been developed to help manage motor fluctuations in advancing PD not adequately controlled with dosage and timing adjustments of oral medications or due to adverse treatment effects, such as dyskinesia (i.e., involuntary movements).27 The aim of this summary of evidence is to determine if a novel, nonsurgical, prodrug combination of foslevodopa and foscarbidopa delivered via continuous, 24-hour subcutaneous infusion by a portable external infusion pump improves motor fluctuations that have been inadequately managed with oral therapy in Medicare beneficiaries with a diagnosis of PD.
Product Description
Blinatumomab
Blinatumomab (Blincyto®, Amgen Inc., Thousand Oaks, CA) is a bi-specific antibody targeted immunotherapy that was previously approved by the Food & Drug Administration (FDA) for the treatment of adults and pediatric patients with: (1) relapsed or refractory CD19-positive B-ALL, or (2) CD19-positive B-ALL in first or second complete remission with minimal residual disease (MRD) greater than or equal to 0.1%. In 2024, the FDA approved a third indication for blinatumomab for the treatment of CD19-positive Philadelphia chromosome-negative B-ALL during the consolidation phase of multiphase therapy in adults and pediatric patients one month or older.28
Foslevodopa/Foscarbidopa
Foslevodopa/foscarbidopa (VYALEV™, Abbvie, Inc., North Chicago, IL) is a subcutaneous, individually titratable, 24-hour continuous infusion of levodopa-based therapy delivered via an external infusion pump (VYAFUSER™, Abbvie, Inc., North Chicago, IL). Foslevodopa/foscarbidopa is FDA approved for the treatment of motor fluctuations in patients with advanced Parkinson's disease. The prodrugs foslevodopa and foscarbidopa are converted to the active forms of levodopa/carbidopa after infusion.29
Food & Drug Administrations (FDA) Approval
Blinatumomab
Blinatumomab first received accelerated FDA approval in December 2014 for the treatment of Philadelphia chromosome-negative relapsed or refractory B-cell precursor ALL and received regular approval for this indication in July 2017.30,31 In March 2018, the FDA granted blinatumomab accelerated approval to treat adults and children with B-cell precursor acute lymphoblastic leukemia (ALL) who are in remission but still have MRD; full approval for this indication was received in June 2023.32,33 Most recently, on June 14, 2024, the FDA approved blinatumomab for adult and pediatric patients one month and older with CD19-positive Philadelphia chromosome-negative B-cell precursor acute lymphoblastic leukemia (Philadelphia-negative BCP ALL) in the consolidation phase of multiphase chemotherapy.34
Foslevodopa/Foscarbidopa
On October 16, 2024, the FDA approved (NDA 216962) foscarbidopa/foslevodopa injection for subcutaneous use for the treatment of motor fluctuations in adults with advanced Parkinson’s disease.35
Evidence Questions
The development of an assessment in support of Medicare coverage decisions is based on the same general question for almost all requests: “Is the evidence sufficient to conclude that the application of the technology under study will improve final health outcomes for Medicare patients?”
The formulation of specific questions for the assessment recognizes that the effect of an intervention can depend substantially on how it is delivered, to whom it is applied, the alternatives with which it is being compared, and the setting where it is used. In order to appraise the net health outcomes of blinatumomab and foslevodopa/foscarbidopa, the DME MACs sought to address the following questions:
Blinatumomab
- In Medicare Beneficiaries with CD19-positive Philadelphia-chromosome negative B-Cell precursor Acute Lymphoblastic Leukemia undergoing the consolidation phase of multiphase chemotherapy, is treatment with blinatumomab compared to SOC (i.e., chemotherapy alone) associated with improved clinical outcomes (i.e., disease-free survival, overall survival, minimal residual disease status)?
- In Medicare Beneficiaries with CD19-positive Philadelphia-chromosome negative B-Cell precursor Acute Lymphoblastic Leukemia undergoing the consolidation phase of multiphase chemotherapy, is treatment with blinatumomab compared to SOC (i.e., chemotherapy alone) associated with a similar rate and/or severity of treatment-emergent adverse events?
Foslevodopa/Foscarbidopa
- In Medicare Beneficiaries with Parkinson’s Disease symptoms not adequately controlled by oral medication, is treatment with subcutaneous foslevodopa/foscarbidopa compared to either SOC (i.e., oral levodopa/carbidopa) or other baseline therapies [e.g., dopamine agonists, monoamine oxidase B (MAO-B) inhibitors] associated with improved clinical outcomes [e.g., motor control (improvement in number of “on” time hours, reduction in number of “off” time hours), QoL]?
- In Medicare Beneficiaries with Parkinson’s Disease symptoms not adequately controlled by oral medication, is treatment with subcutaneous foslevodopa/foscarbidopa compared to SOC (i.e., oral levodopa/carbidopa) or other baseline therapies (e.g., dopamine agonists, MAO-B inhibitors) associated with a similar rate and/or severity of treatment emergent adverse events (e.g., dyskinesia)?
Literature Analysis
Clinical Literature Analysis
Blinatumomab
A multicenter, phase 3 randomized controlled trial (RCT) by Hogan, et al.,36 including 255 pediatric and adult patients (1 to 30 years of age) with low-risk first-relapse Philadelphia-chromosome negative B-ALL, analyzed the effect of consolidation treatment with blinatumomab and chemotherapy (n = 127; median age: 11; 59.8% male) compared to chemotherapy alone (n = 128; median age: 10; 59.4% male) after reinduction on disease free survival (DFS; defined as the time from randomization to relapse, second malignancy, or death), overall survival (OS) and adverse events (AEs). The overall 4-year DFS rate was 55.2% ± 3.6%; there was no statistically significant difference in the overall 4-year DFS rate between the blinatumomab (61.2% ± 5.0%) and the chemotherapy groups [49.5% ± 5.2%; p = 0.089; HR (95% CI): 0.76 (0.51-1.14)]. The OS rate for the cohort was 84.9% ± 2.7%, and there was no statistically significant difference in OS between the blinatumomab (90.4% ± 3.0%) and chemotherapy groups [79.6% ± 4.3%; p = 0.11; HR (95% CI): 0.65 (0.32-1.30)]. Adverse events occurred in 105 patients (89%; 103 ≥ Grade 3) in the chemotherapy group and 117 participants (97%; 104 ≥ Grade 3) in the blinatumomab group. The limitations of this study include the unclear blinding of participants/assessors and the potential for indirectness of the results in relation to the typical Medicare beneficiary (due to the primarily pediatric patient population).
A multicenter, phase 3 RCT by Brown, et al,.37 including 208 pediatric and adult patients (1 to 30 years) with high- or intermediate-risk first-relapse Philadelphia-chromosome negative B-ALL, analyzed the effect of consolidation treatment with blinatumomab and chemotherapy (n = 105; median age: 9; 57% male; 65.7% high-risk) compared to chemotherapy alone (n = 103; median age: 9; 54% male; 67% high-risk) after reinduction on DFS [defined as the time from randomization to late treatment failure (≥ 5% marrow blasts after first course of randomized therapy), relapse, second malignancy, or death], OS, minimal residual disease (MRD) status, and the rate/severity of AEs. Randomization was terminated early at the recommendation of the data and safety monitoring committee due to the loss of clinical equipoise between the randomized treatments; thus, of 214 patients randomized (out of a planned enrollment of 220 patients), 6 patients were excluded due to enrollment after the interim analysis cutoff date. The DFS rate was 54.4% for the blinatumomab group compared to 39% for the chemotherapy group, which was not statistically significant, but favored blinatumomab [p = 0.03; significance set at p = 0.025; HR: 0.70 (95% CI: 0.47-1.03)]. There was a statistically significant difference in the 2-year OS rate in the blinatumomab group (71.3%) compared to the chemotherapy group (58.4%), in favor of blinatumomab [p = 0.02; HR: 0.62 (95% CI: 0.39-0.98)]. A total of 81.4% of AEs in the blinatumomab group and 92.8% in the chemotherapy group were Grade 3 or above; the most common Grade 3 or above AE was cytopenia for the blinatumomab group and cytopenia, febrile neutropenia, increased alanine aminotransferase, mucositis, and sepsis for the chemotherapy group. The study was limited by the recommended early termination of randomization which led to the primary endpoint being underpowered, the unclear blinding of participants/assessors, and the potential for indirectness of the results in relation to the typical Medicare beneficiary (due to the primarily pediatric patient population).
A multicenter, phase 3 RCT by Locatelli, et al.,38 including 108 pediatric patients (age > 28 days and < 18 years) with high-risk, first-relapse Philadelphia-chromosome negative B-ALL, analyzed the effect of consolidation treatment with blinatumomab and chemotherapy (n = 54; median age: 6; 55.6 % male) compared to chemotherapy alone (n = 54; median age: 5; 40.7% male) after reinduction on event-free survival (defined as relapse, death, second malignancy, or failure to achieve complete remission), OS, MRD remission (defined as < 0.001 blast cells within 29 days of treatment initiation), and AEs. Enrollment was terminated early based on a pre-specified stopping rule after a planned interim analysis at 50% of the event-free survival events found benefit of blinatumomab; all patients enrolled at the time of enrollment termination were included in the analysis (108 out of the planned enrollment of 202 patients). Event-free survival was significantly longer with blinatumomab compared to chemotherapy alone [HR: 0.33 (95% CI: 0.18-0.61); p < 0.001] with a 24-month event-free survival rate of 66.2% (95% CI: 50.1%-78.2%) for the blinatumomab group and 27.1% (95% CI: 13.2%-43.0%) for the chemotherapy group. The median OS was 19.5 months; there were fewer deaths in the blinatumomab group (n = 8) than in the chemotherapy alone group [n = 16; HR: 0.43 (95% CI: 0.18-1.01)]. MRD remission was achieved by more patients in the blinatumomab group with an absolute percent difference of 35.6% (95% CI: 15.6%-52.5%) between the treatment groups. The cumulative incidence rate of relapse at 24 months was lower in the blinatumomab group compared to the chemotherapy alone group [24.9% (95% CI: 13.2%-38.5%) versus 70.8% (95% CI: 50.7%-83.9%), respectively; HR: 0.24 (95% CI: 0.13-0.46)]. Serious AE occurrence rates were similar in the treatment groups (blinatumomab: 24.1%; chemotherapy: 23.1%). This study was limited by the evaluation of a single course of blinatumomab during consolidation therapy, the unclear blinding of participants/assessors, and the potential for indirectness of the results in relation to the typical Medicare beneficiary (due to the primarily pediatric patient population).
An international, phase 3 RCT by Litzow, et al.,39 including 224 adult patients (30 to 70 years of age) with Philadelphia-chromosome negative B-ALL who were MRD negative after induction and intensification chemotherapy, analyzed the effect of blinatumomab plus chemotherapy (4 rounds of chemotherapy with 2 rounds of blinatumomab before and after; n = 112; median age: 51.5; 51% female) compared to standard chemotherapy alone (4 rounds of chemotherapy; n = 112; median age: 50; 50% female) in the consolidation phase of therapy on OS, relapse-free survival and AEs. After a median 43-month follow-up period, the data and safety monitoring committee recommended that the third efficacy interim analysis data be released, which comprised 60% of the planned overall survival events. The 3-year OS was 85% for the blinatumomab group compared to 68% for the chemotherapy group [HR: 0.41 (95% CI: 0.23-0.73); p = 0.002, which crossed the p = 0.007 efficacy stopping point]. The 3-year relapse-free survival was 80% in the blinatumomab group and 64% in the chemotherapy group [HR: 0.53 (95% CI: 0.32-0.87)]. In a multivariate analysis, both the results for 3-year relapse-free survival (HR: 0.57; 95% CI: 0.33-0.98) and overall survival (HR: 0.44; 95% CI: 0.23-0.81) favored blinatumomab compared to chemotherapy. Patients treated with blinatumomab had significantly more ≥ Grade 3 neurologic or psychiatric adverse events compared to patients in the chemotherapy only group (23% vs 5%; p < 0.001), but other treatment-related nonhematologic adverse events of ≥ Grade 3 occurred in similar numbers (p = 0.87). This study was limited by the unclear blinding of participants/assessors.
Foslevodopa/Foscarbidopa
Outcome Measures
Objective
Parkinson’s KinetiGraph or Personal KinetiGraph (PKG): A wrist-worn device which takes accelerometry readings every 2 minutes for 6-10 days; these readings are converted into median bradykinesia and dyskinesia scores by an algorithm, which are then reported as a median and interquartile range (IQR), due to their non-normal distribution.40,41 Lower scores indicate better motor symptoms, with some research suggesting that bradykinesia and dyskinesia can be considered adequately treated with scores of < 25 and < 9, respectively.40,42 A PKG was used by Soileau 2022.43
Subjective (Patient-reported)
EuroQol 5-Dimension Questionnaire (EQ-5D-5L): Consists of a visual analogue scale (VAS) for health and 5 descriptive statistics on mobility, self-care, usual activities, pain/discomfort, and anxiety/depression which are rated from 1 “no problems” to 5 “extreme problems.”44 Data can be presented as descriptive, (i.e., the number of participants reporting each level), as the standard VAS, or as a summary index, which applies a formula to apply a weight to each of the descriptive values (0 = worst health and 1 = perfect health). Soileau 202243 reported the summary index while Aldred 202345 reported both the VAS and the summary index.
Movement Disorder Society-Unified PD Rating Scale (MDS-UPDRS): Consists of 4 sections which assess non-motor experiences of daily living (Part I), motor experiences of daily living (Part II), a motor examination (Part III), and motor complication (Part IV). Part I and Part II are reported by the patient, and use a rating scale of “0” no problems present to “4” severe problems are present.46 Part I includes assessment of cognitive impairment, mood, hallucinations/psychosis, sleep, bowel/urinary problems, and fatigue while Part II assesses activities of daily living (i.e., speech, eating, dressing, tremor, walking, hygiene). Parts III and IV are assessed by the investigator and use a rating scale of “0” no problems/asymptomatic to “4” a severe presentation of the symptom. Part III includes an overall movement examination, including speech, gait, hands, posture, tremor, etc. Part IV is an assessment of the impact and amount of time a patient experiences dyskinesias, motor fluctuations, and dystonia. Soileau 202243 utilized Part II while Aldred 202345 utilized Parts I-IV.
“On”/”Off” time: A way to differentiate between periods of time where motor symptoms are improved after treatment with medication (“On” time) and periods where motor symptoms are not adequately controlled (“Off” time), either due to lack of effect of medication or wearing off of a dose of medication.25 Both Soileau 202243 and Aldred 202345 assessed “On”/”Off” time through a daily patient diary.47,48
Parkinson’s Disease Questionnaire (PDQ-39): A 39-item survey for quality of life which assesses domains of mobility, activities of daily living (ADLs), emotional well-being, stigma, cognition, communication, and bodily discomfort; the scores of each domain are converted into a score from “0” no problems to “100” the worst/maximum level of the problem and higher scores equal worse QoL.49,50 This questionnaire was used by Soileau 202243 and Aldred 2023.45
Parkinson’s Disease Sleep Scale-2 (PDSS-2): A 15-item survey which assesses sleep quality on a 5-point scale ranging from “Very often” to “Never”; a patient’s total score ranges from 0 to 60, and higher scores indicate worse sleep quality.51 This survey was used by Soileau 202243 and Aldred 2023.45
Literature Analysis
A 12-week, phase 3, double-blind, randomized controlled trial (RCT) by Soileau, et al.43 analyzed the effect of continuous subcutaneous infusion (CSCI) of foslevodopa/foscarbidopa with oral placebo compared to subcutaneous placebo with oral levodopa/carbidopa in patients with Parkinson's Disease whose motor fluctuations were inadequately controlled by their current therapy. A total of 145 patients were randomized and 141 patients were included in the full and safety analyses (CSCI group: n = 74, mean age 66.3 years; control group: n = 67, mean age 66.6 years). Both "on" time without troublesome dyskinesia and “off” time were significantly improved from baseline in the CSCI group compared to the oral treatment group [“on” time: difference (least squares means of odds ratio (SE); 95% CI): 1.75 hours (0.65; 0.46-3.05); p = 0.0083; “off” time: difference (SE; 95% CI): -1.79 hours (0.63; -3.03 to -0.54); p = 0.0054]. While the difference in the change from baseline in the MDS-UPDRS part II score between the two treatment groups did not reach significance, the results favored the CSCI group [difference (SE; 95% CI): -1.58 (1.05; 3.65 to 0.48); p = 0.13]. Additionally, morning akinesia was reported by a smaller proportion of patients in the CSCI group (17%) compared to the oral treatment group (63%), and "on" time without dyskinesia was increased by 25% in the CSCI group compared to 7% in the oral treatment group [difference (SE; 95% CI): 1.81 hours (0.68; 0.46-3.16)]. The remainder of secondary outcome measures were reported without significance calculations; however, most favored CSCI compared to oral treatment: PDSS-2 score [difference (SE; 95% CI): -5.40 (1.32; -8.03 to -2.78)], PDQ-39 score [difference (SE; 95% CI): -4.10 (2.04; -8.14 to 0.05)], EQ-5D-5L score [difference (SE; 95% CI): 0.049 (0.025; -0.001 to 0.100)], and median PKG dyskinesia score [difference (SE; 95% CI): -2.73 (1.96; -6.61 to 1.15). The CSCI treatment group experienced an increase in the median PKG bradykinesia score compared to the oral treatment group [difference (SE; 95% CI): 1.72 (0.72; 0.03-3.15)]. Adverse events (AE) were reported in 85% of CSCI patients compared to 63% of oral treatment patients; 52 AEs in the CSCI group were considered related to the study drug vs 15 events in the oral treatment group. Most AEs were mild to moderate in severity. The CSCI group, compared to the oral treatment group, had a higher incidence of infusion site adverse events (72% vs 12%), including erythema (27% vs 1%), pain (26% vs 1%), cellulitis (19% vs 0), and edema (12% vs 0); hallucinations or psychosis (15% vs 3%) were also reported more frequently in patients in the CSCI group compared to the oral treatment group. The AE profile was noted to be similar to known adverse effects of levodopa-containing medications, as well as other subcutaneously delivered medications. This study was limited by the shorter duration of follow-up and use of patient reported outcome measures (which can be subject to response and recall bias).
A non-randomized, open-label, phase 3 trial by Aldred, et al.45 assessed the safety and efficacy of 24-hour CSCI of foslevodopa/foscarbidopa over 12-months in patients with Parkinson's disease whose motor fluctuations were inadequately controlled by their current treatment regimen. A total of 244 patients were enrolled in this study [mean age: 63.9 (51.2% ≥ 65 years)]. For safety, 230/244 patients experienced at least one AE and 224 (91.8%) of these AEs were considered related to the study drug. Most AEs were mild or moderate in severity and resolved. The most common AEs were associated with the infusion site [erythema (n = 127; 52%), nodules (n = 70; 28.7%), cellulitis (n = 56; 23%), edema (n = 47; 19.3%), pain (n = 38; 15.6%), reaction (n = 30; 12.3%), and abscess (n = 27; 11.1%)], hallucination (n = 42; 17.2%), fall (n = 41; 16.8%), anxiety (n = 29; 11.9%), and dizziness (n = 25; 10.2%). The most common serious adverse events were infusion site cellulitis (n = 10; 4.1%), infusion site abscess (n = 8; 3.3%), and hallucination (n = 7; 2.9%). It was noted that the adverse event profile was similar to other subcutaneous therapies. For efficacy, there was a significant change from baseline, at 52 weeks, in normalized "off" time [mean (SD) change: -3.5 (3.1) hours; p ≤ 0.001; average reduction: 59%], normalized "on" without troublesome dyskinesia [includes both time without dyskinesia and with non-troublesome dyskinesia; mean (SD) change: 3.8 (3.3) hours; p ≤ 0.001; average increase: 41%], and normalized "on" time without dyskinesia [mean (SD) change: 3.9 (4.2) hours; p ≤ 0.001; average increase: 58%]. Morning akinesia was reported in 77.7% of patients at baseline, which decreased to 27.8% of patients at week 52. Finally, there was a significant improvement (all p ≤ 0.001) in the PDSS-2, PDQ-39, EQ-5D-5L (VAS and summary index), and the MDS-UPDRS part II and IV (but not part III, which includes bradykinesia and tremor) at week 52 compared to baseline. This study was limited by the lack of randomization, lack of an active comparator, lack of blinding, and loss of > 40% participants over the course of the 52-week study.
Evidence Based Guidelines
Blinatumomab
National Comprehensive Cancer Network® (NCCN ®) Clinical Practice Guidelines52,53
The NCCN Clinical Practice Guidelines include a category 2A recommendation for use of blinatumomab as a treatment option during the consolidation phase in adults and pediatric patients with CD19-positive Philadelphia chromosome-negative B-ALL. Category 2A is “based upon lower-level evidence, there is uniform NCCN consensus (≥ 85% support of the Panel) that the intervention is appropriate.” Per the NCCN Referencing Guidelines, “NCCN makes no warranties of any kind whatsoever regarding their content, use or application and disclaims any responsibility for their application or use in any way.”
Foslevodopa/Foscarbidopa
National Institute for Clinical Excellence (NICE). Foslevodopa–foscarbidopa for treating advanced Parkinson’s with motor symptoms: NICE guidance [ta934]. https://www.nice.org.uk/guidance/ta934. Updated November 29, 2023 (Accessed January 8, 2025)54
The NICE Guidelines include the following recommendations for foslevodopa/foscarbidopa (in relevant part):
1.1 Foslevodopa–foscarbidopa is recommended as an option for treating advanced levodopa-responsive Parkinson's in adults whose symptoms include severe motor fluctuations and hyperkinesia or dyskinesia, when available medicines are not working well enough, only if:
- they cannot have apomorphine or deep brain stimulation, or these treatments no longer control symptoms, and
- the company provides foslevodopa–foscarbidopa according to the commercial arrangement.
1.2 This recommendation is not intended to affect treatment with foslevodopa–foscarbidopa that was started in the [National Health Service] NHS before this guidance was published. People having treatment outside this recommendation may continue without change to the funding arrangements in place for them before this guidance was published, until they and their NHS clinician consider it appropriate to stop.
Professional Society Recommendations/Health Technology Assessments
Foslevodopa/Foscarbidopa
Foslevodopa-Foscarbidopa (Vyalev): CADTH Reimbursement Review. Ottawa (ON): Canadian Agency for Drugs and Technologies in Health; September 2023.55
The Canadian Agency for Drugs and Technologies in Health (CADTH) conducted a review and appraisal of sponsor-submitted evidence regarding the beneficial and harmful effects of the subcutaneous infusion of foslevodopa (240 mg/mL) and foscarbidopa (12 mg/mL) solution for the treatment of motor fluctuations in patients with advanced PD. The review focused on comparing foslevodopa/foscarbidopa to relevant comparators and identifying gaps in the current evidence. Clinical evidence reviewed included the pivotal phase III RCT (M15-736), the long-term extension study, one indirect treatment comparison, and two additional studies (M15-741 and M15-737).
The review concluded that foslevodopa/foscarbidopa demonstrated a clinically meaningful improvement in “on” time without troublesome dyskinesia and “off” time compared with oral LD-CD therapy at 12 weeks in patients with advanced PD based on the pivotal M15-736 trial. Analyses of morning akinesia, HRQoL, bradykinesia, and sleep symptoms also favored foslevodopa/foscarbidopa, however these results were inconclusive due to failure of a prior outcome in the statistical testing hierarchy. Results did not show a difference in motor experiences of daily living. The pivotal study results were overall generalizable. The safety and effectiveness of foslevodopa-foscarbidopa relative to comparators other than oral LD-CD could not be determined based on the evidence submitted. There were no direct comparisons with levodopa/carbidopa intestinal gel (LCIG), and the indirect comparison was inconclusive. There were also no comparisons between foslevodopa/foscarbidopa and DBS. Overall, the safety profile of foslevodopa/foscarbidopa was similar to oral LD-CD therapy. Infusion-site reactions and infections were more frequent with foslevodopa/foscarbidopa but most were not serious. No new serious safety concerns were identified in the longer-term safety studies.
Reimbursement recommendations from CDATH are outlined below.
Foslevodopa-Foscarbidopa (Vyalev): CADTH Reimbursement Recommendation. Ottawa (ON): Canadian Agency for Drugs and Technologies in Health; July 2023.56
The Canadian Agency for Drugs and Technologies in Health (CADTH) makes the following reimbursement recommendations (in relevant part) for Vyalev:
“CADTH recommends that Vyalev should be reimbursed by public drug plans for the treatment of motor fluctuations in patients with advanced levodopa-responsive Parkinson disease (PD) who do not have satisfactory control of severe, debilitating motor fluctuations and hyperkinesia or dyskinesia despite optimized treatment with available combinations of medicinal products for PD if certain [reimbursement] conditions [specified below] are met.”
“Vyalev should only be covered to treat patients with advanced PD who have unpredictable changes in movement symptoms and severe limitations in being able to perform daily activities while receiving optimized oral therapy. Patients should have previously shown improvement in their symptoms when they received levodopa treatment and should not have severe psychosis or severe dementia. Patients or caregivers should be able to understand how to use the drug infusion system correctly.”
“Vyalev should only be reimbursed if prescribed by neurologists who are specialized in managing movement disorders or with expertise in managing advanced PD.”
Reimbursement Conditions for Initiation:
“1. In patients with advanced levodopa-responsive PD only if all of the following criteria are met:
1.1. have not been able to achieve satisfactory control of severe, debilitating motor fluctuations and hyperkinesia or dyskinesia despite optimized treatment with available combinations of PD treatments, including maximally tolerated doses of levodopa in combination with carbidopa, a COMT inhibitor, a dopamine agonist, a MAO-B inhibitor, and amantadine, if not contraindicated
1.2. have severe disability associated with at least 25% of the waking day in the off state and/or ongoing, bothersome levodopa-induced dyskinesias, despite having tried frequent dosing of levodopa (at least 5 doses per day)
1.3. have received an adequate trial of maximally tolerated doses of levodopa, with previously demonstrated clinical response
1.4. the patient does not have severe psychosis or severe dementia
1.5. patient or caregiver are able to demonstrate correct understanding and use of the delivery system.”
Reimbursement Conditions for Renewal:
2. “Eligibility for foslevodopa-foscarbidopa should be based on the criteria used by each of the public drug plans for the renewal of LCIG in patients with advanced PD.”
“The patient should continue to benefit from treatment for renewal of foslevodopa-foscarbidopa reimbursement. It is expected that clinicians will continue to monitor their patients and discontinue foslevodopa-foscarbidopa if the patient is no longer benefiting from treatment.”