Introducing AVLAYAH™

The first FDA-approved enzyme replacement therapy (ERT) to cross the blood-brain barrier to reach the brain in addition to the body

AVLAYAH is approved for the treatment of neurologic symptoms in pediatric patients weighing at least 5 kg with Hunter syndrome prior to advanced neurologic disease. This approval is based on a reduction of heparan sulfate (HS) in the cerebrospinal fluid (CSF) surrounding the brain and spinal cord. Studies are ongoing to confirm how well it works in improving clinical symptoms.

AVLAYAH is not recommended for use in combination with other enzyme replacement therapies for the treatment of Hunter syndrome.

FDA=US Food and Drug Administration.

How does AVLAYAH work?

Watch the mechanism of action (MOA) video

AVLAYAH was studied across a broad group of pediatric patients with Hunter syndrome

The Phase 1/2 study was a multi-center, multi-cohort, open-label trial in 47 individuals with MPS II.

Study participant characteristics:

  • Both severe/neuronopathic (n=44) and attenuated/non-neuronopathic (n=3) MPS II individuals
  • Treatment status: ~2/3 (n=32) had prior ERT treatment and ~1/3 (n=15) had no prior treatment
    • Of those previously treated with ERT: 2 had also received gene therapy and 2 had previously received hematopoietic stem cell transplant (HSCT)

Individuals in the study were followed for a median of 2 years, with some for up to 4 years

Treatment with AVLAYAH resulted in normalization of CSF HS

Normal was defined as biomarker levels seen in individuals of similar age without MPS II

Learn more about biomarkers

Brain

CNS (brain) results

CSF HS

93%

(41/44) of individuals achieved normalization of CSF HS* by Week 24.

  • At Week 49, this proportion was 98% (n=42/43)
At study start, 0% (0/47) of individuals had normal levels of CSF HS.

*CSF HS is the primary GAG that accumulates in the brain of individuals with MPS II.

Data Limitations
Data at Week 49 should be interpreted with caution and considered exploratory. The relationship between CSF HS and clinical response has not been established.

*CSF HS is the primary GAG that accumulates in the brain of individuals with MPS II.

On average, AVLAYAH resulted in 91% reduction of CSF HS levels by Week 24

In addition, AVLAYAH normalized urine GAG levels

Body Icon

Peripheral (body) results

AVLAYAH is approved for the treatment of neurologic symptoms in pediatric patients weighing at least 5 kg with Hunter syndrome prior to advanced neurologic disease. This approval is based on a reduction of heparan sulfate (HS) in the cerebrospinal fluid (CSF) surrounding the brain and spinal cord. Studies are ongoing to confirm how well it works in improving clinical symptoms.

uGAG

68%

(26/38) of individuals achieved normalization of uGAG by Week 24.

  • At Week 49, 90% of individuals (n=34/38) had normal uGAG levels
At study start, 4% (2/47) of individuals had normal uGAG levels.
Data Limitations
Data at Week 49 should be interpreted with caution and considered exploratory. The relationship between changes in total uGAG levels to clinical response has not been established.

Clinical results, including CNS and peripheral outcomes, are being assessed in the ongoing Phase 2/3 study

CNS=central nervous system;
CSF HS=cerebrospinal fluid heparan sulfate;
GAG=glycosaminoglycans;
MPS II=mucopolysaccharidosis II;
uGAG=urine glycosaminoglycan.

The safety of AVLAYAH was evaluated over a median of 2 years, with up to 4 years of follow-up

Serious side effects may occur with AVLAYAH, including hypersensitivity (allergic) reactions such as anaphylaxis, which can be life-threatening; infusion-associated reactions (IARs); anemia; and membranous nephropathy (kidney disorder that affects the filters that help remove wastes and fluids from the kidney).

In 47 patients treated with AVLAYAH:

IARs
  • The most common side effect with AVLAYAH was IARs, occurring in 87% of patients
  • 6% of IARs were severe
  • IARs declined in frequency with continued use of AVLAYAH
  • IARs may still occur despite extended duration of AVLAYAH treatment
Anemia
  • Anemia was reported in 51% of patients treated with AVLAYAH
  • 4% of patients (n=2) experienced severe anemia (defined as hemoglobin <8.0 g/dL)
  • Overall, the incidence and severity of anemia decreased over time
  • At baseline, 19% of patients had pre-existing anemia*
  • Incidence of anemia post initiating AVLAYAH was higher in patients with baseline anemia compared to those without baseline anemia
  • Hemoglobin lab parameters should be assessed prior to initiating AVLAYAH, 3 months after initiation, and periodically thereafter as clinically indicated

*Hemoglobin range: 8.0 g/dL to <lower limit of normal.

The most common side effects (≥20%) were IAR, upper respiratory infection, ear infection, fever, anemia, cough, vomiting, diarrhea, rash, COVID-19, runny or congested nose, fall, headache, skin injuries, and hives.

AVLAYAH is administered as an IV infusion once every week

AVLAYAH should be administered by a healthcare provider knowledgeable in the management of hypersensitivity reactions, including anaphylaxis

Hospital Icon
AVLAYAH is initially given in a clinic or hospital setting to ensure the close monitoring and management of any adverse reactions.
Dosage Icon
AVLAYAH is a once-weekly intravenous (IV) infusion with weight-based dosing.
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Treatment will be initiated following a dose-escalation regimen to reduce the risk of IARs.
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The infusion itself takes about 4 hours, though timing may vary based on the individual and could be longer. Additional time will be needed for check-in, preparation, monitoring, and follow-up care.
3 Hours Clock
Once the individual has reached and tolerated the maintenance dose, the infusion time may be reduced to a minimum of 3 hours.
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Home infusion under the supervision of a healthcare provider may be considered for individuals who have reached and tolerated the maintenance dose for AVLAYAH. The decision to have individuals move to home infusion should be made after evaluation and recommendation by a physician.

Denali Patient Services is here to support you

Patient Service
We know every patient’s journey is unique. Denali Patient Services offers personalized support services to patients, caregivers, and providers navigating therapy with AVLAYAH.

Our Denali CARE Team is here to help

Once enrolled in Denali Patient Services, patients will be connected with a dedicated Denali CARE Partner who will support them with information about coverage, affordability, and logistics. Denali CARE Partners can also provide one-on-one support and check-ins on request, share educational resources, and address patient and caregiver questions about program services and access.

Our Denali CARE Team is here to help with*:

Insurance Icon
Insurance Coverage
Treatment Coordination
Treatment Coordination
Information and Resources
Information and Resources
Money Icon
Financial Assistance
  • Copay Program

    With the Denali Patient Services Copay Program, eligible patients with commercial insurance may pay as little as $0† for AVLAYAH. Please see Program Terms and Conditions for more information, and visit www.avlayah.com/copay to enroll.

  • Independent Copay Assistance Foundations

    Denali CARE Partners can provide information about independent charitable organizations that may offer financial support.

Members of the Denali CARE team.
*
Denali CARE Partners do not provide medical advice and are not a substitute for professional care. All decisions regarding medical care and treatment should be made between patients and their healthcare providers.
There is an annual cap on the amount of assistance that patients can receive over a one-year period. Federal and state laws and other factors may prevent or otherwise restrict eligibility. People covered by Medicare, Medicaid, the VA/DoD, or any other federal or state government plans are not eligible to enroll. Enrollment does not guarantee approval or payment of benefits. Denali Patient Services reserves the right to change this offer, eligibility, and terms of use at any time without notice. Visit avlayah.com/copay for full Terms and Conditions.
Independent copay assistance foundations have their own rules for eligibility. Denali is not affiliated with these organizations and does not influence their decision-making or criteria. Availability may vary, and applying does not guarantee support. This information is provided as a resource only and does not represent an endorsement or preference for any particular foundation. The foundations referenced may not be the only ones that could potentially provide support.

To contact the Denali CARE Team for support, questions, or information about treatment with AVLAYAH:

1-844-DNLI365 (844-365-4365) Monday-Friday 8:30 am – 8:00 pm ET

Just want to receive news and updates on AVLAYAH?

Downloadable Resources

For Patients & Caregivers +
AVLAYAH Patient Brochure (English)
AVLAYAH Patient Brochure (English)
Download resource
AVLAYAH Patient Brochure (Español)
AVLAYAH Patient Brochure (Español)
Download resource
Infusion Experience Flashcard (English)
Infusion Experience Flashcard (English)
Download resource
Infusion Experience Flashcard (Español)
Infusion Experience Flashcard (Español)
Download resource
For Healthcare Professionals +
AVLAYAH Overview Brochure
AVLAYAH Overview Brochure
Download resource
AVLAYAH Dosing Guide
AVLAYAH Dosing Guide
Download resource
Access Resources +
Sample Letter of Medical Necessity
Sample Letter of Medical Necessity
Download resource
Sample Exception Letter
Sample Exception Letter
Download resource
Sample Appeal Letter
Sample Appeal Letter
Download resource
AVLAYAH Start Form (English)
AVLAYAH Start Form (English)
Download resource
AVLAYAH Start Form (Español)
AVLAYAH Start Form (Español)
Download resource
Billing & Coding Guide
Billing & Coding Guide
Download resource
Denali Patient Services Brochure
Denali Patient Services Brochure
Download resource
Prior Authorization Checklist
Prior Authorization Checklist
Download resource
Distribution & Handling Flashcard
Distribution & Handling Flashcard
Download resource
Patient Start Form (English)
Patient Start Form (English)
Download resource
Patient Start Form (Español)
Patient Start Form (Español)
Download resource

Healthcare professionals webinar

AVLAYAH launch webinar, presented by Dr. Joseph Muenzer

Sign up for AVLAYAH news and updates

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Measurable signs of disease activity called biomarkers were used to assess how well AVLAYAH works

Understanding biomarkers

Icon Body

Body biomarkers
  • Complex molecules called glycosaminoglycans (GAGs) accumulate in the body and brain of individuals with Hunter syndrome. Continued GAG buildup leads to symptoms arising and worsening over time
  • Urine GAG (uGAG) is a measure of GAG levels in the urine that is helpful in tracking how Hunter syndrome affects the body
  • In Hunter syndrome, the two types of GAGs that accumulate are heparan sulfate (HS) and dermatan sulfate (DS). HS is the primary GAG that accumulates in the brain, as well as in the liver and kidneys. DS is the GAG that accumulates in the periphery in tissues such as cardiac and respiratory tissues. uGAG levels include HS and DS, among other GAG types

Icon Brain

Brain biomarkers
  • Cerebrospinal fluid heparan sulfate (CSF HS): A biomarker of GAG buildup in the brain, based on levels of HS measured in the fluid around the brain and spinal cord

Copay Program Terms and Conditions

It is important that every patient read and understand the full Denali Patient Services Copay Program Terms and Conditions. The summary provided here is not a substitute for reviewing the complete Terms and Conditions in their entirety. By enrolling, patients acknowledge and agree to the Terms and Conditions and the Denali Privacy Policy, available at: https://www.denalitherapeutics.com/privacy-policy/.

Enrollment does not guarantee approval or payment of benefits. Denali reserves the right to rescind, revoke, terminate, or change this offer, eligibility, and these Terms and Conditions at any time without notice.

As further described below, in general:

I. ELIGIBILITY

*Eligibility Criteria: Subject to program limitations and terms and conditions the Denali Patient Services Copay Program is open to patients who have been prescribed AVLAYAH and who have commercial or private insurance that covers AVLAYAH, including state and federal plans commonly referred to as “healthcare exchanges plans.” This program helps eligible patients cover out-of-pocket costs related to AVLAYAH, up to program limits. There is no income requirement to participate in this program. Eligibility is dependent on product indication and patient must have a valid prescription for an FDA approved indication.

Patients under 18 years of age must have a parent, legal guardian, or other legally authorized representative to enroll and accept these Terms and Conditions on the patient’s behalf.

This offer is not valid if the entire cost of your AVLAYAH prescription is eligible to be reimbursed by your commercial plan or other private health or pharmacy benefit programs, or if your insurer or plan prohibits use of manufacturer copay assistance.

This offer is not valid for patients whose coverage for AVLAYAH is paid for in whole or in part by Medicare, Medicaid, or any other federal or state healthcare program. It is not valid for cash-paying patients or where prohibited, taxed, or restricted by law. A patient is considered cash-paying when the patient has no insurance coverage for AVLAYAH or where the patient’s insurance provides little or no meaningful coverage for AVLAYAH. Such patients may be considered ineligible because such coverage does not provide a material level of financial assistance for the cost of a AVLAYAH prescription. This offer is only valid in the United States and Puerto Rico at eligible pharmacies and sites of care.

This offer is not valid in combination with any other coupon, discount, prescription savings card, rebate, free trial, patient assistance program, or any other similar offer, including those from third parties or entities that assist insurers or health plans in managing costs.

II. PROGRAM BENEFITS

Denali may modify the benefit amount, in its sole discretion, to satisfy the out-of-pocket cost sharing requirement, including in circumstances where a plan or plan agent (including, but not limited to, a pharmacy benefit manager (PBM)) conditions waiver of some or all out-of-pocket cost sharing on enrollment in or use of this Program.

Some health plans may implement co-pay accumulator or co-pay maximizer programs. These programs are designed to adjust a patient’s out-of-pocket responsibility based on the availability of manufacturer co-pay assistance. In such cases, the Annual Program Maximum may vary over time to ensure that Program funds are applied for the patient’s benefit. Denali also reserves the right to reduce, modify, or discontinue assistance if the patient is enrolled in, or becomes subject to, a co-pay accumulator, co-pay maximizer, or similar program.

Health plans and pharmacy benefit managers (PBMs) are prohibited from enrolling or assisting in the enrollment of patients in the Denali Patient Services Copay Program. The patient or the patient’s legal representative must personally enroll to be eligible for Program benefits.

If at any time a patient begins receiving coverage for treatment under any federal, state, or government healthcare program (including but not limited to Medicare, Medicaid, TRICARE, Department of Defense, or Veteran Affairs programs), the patient will no longer be able to use the Denali Patient Services Copay Program and you must contact Denali Patient Services at 844-DNLI365 (844-365-4365) to stop your participation in this program.

Patients may not seek reimbursement for the value received from the Denali Patient Services Copay Program from any third-party payers, including a flexible spending account or healthcare savings account. Participating in this program means that you are ensuring you comply with any required disclosure regarding your participation in the Denali Patient Services Copay Program and of your insurance carrier or pharmacy benefit manager. Restrictions may apply. Offer subject to change or discontinuation without notice. This is not health insurance.

III. PROGRAM DETAILS

For all eligible patients the Denali Patient Services Copay Program offers:

Maximum Program Benefit, Benefits May Change, End or Vary Without Notice: The program provides up to a Maximum Program Benefit of support to reduce a patient’s out-of-pocket costs that Denali will provide per patient for each calendar year, which must be applied to the patient’s out-of-pocket costs (copay, deductible, or co-insurance and annual out-of-pocket maximum). Patient Program Benefit amounts are unilaterally determined by Denali in its sole discretion and will not exceed the Maximum Program Benefit.

Please ask your Denali Patient Services Representative to help you understand whether your insurance coverage is likely to result in your reaching the Maximum Program Benefit amount by calling 844-DNLI365 (844-365-4365).

Participating patients are solely responsible for updating Denali with changes to their insurance including, but not limited to, initiation of insurance provided by the government, the addition of any coverage terms that do not apply Denali Patient Services Copay Program benefits to reduce a patient’s out-of-pocket costs, such as accumulator adjustment benefit design or a copay maximization program. Participating patients are responsible for providing Denali with accurate information necessary to determine program eligibility. By accepting payments from Denali made on behalf of participating patients, Plans likewise are responsible for providing Denali with accurate information regarding patient eligibility.

By enrolling, patients also agree to: (a) notify the Program immediately if their insurance coverage changes, including enrollment in a government healthcare program or other plan design that may affect Denali Patient Services Copay Program benefits; (b) comply with all requirements of their health plan; and (c) not submit any claim for reimbursement of amounts covered by this Program to any third-party payer, whether public or private, including a Flexible Spending Account (FSA) or Health Savings Account (HSA).

Patients may use the Denali Patient Services Copay Program every time they receive dose of AVLAYAH, up to the Maximum Program Benefit. Benefits reset each calendar year.

IV. ADDITIONAL TERMS

Non-Transferable: The Program benefit is offered to, and intended for, the sole benefit of eligible patients. The Program is limited to one per patient and is not transferable. The Program may not be sold, purchased, traded, assigned, or otherwise transferred. No substitutions are permitted; the Program is valid only for the product indicated.

No Cash Value: This offer is not health insurance, has no cash value, and may not be redeemed for cash. Assistance provided under the Program may not exceed the patient’s out-of-pocket cost for AVLAYAH or the Maximum Program Benefit, whichever is less.

Misuse: Denali may deny or discontinue Program benefits if it determines a patient is ineligible or if it suspects fraud, misuse, or other violation of these Terms and Conditions.

Reduction data

Treatment with AVLAYAH resulted in reductions in total urine GAG, urine HS, and urine DS levels

Body biomarker
uGAG
At Week 24, total uGAGs* were reduced by

57%

Body biomarker
uHS
At Week 24, uHS was reduced by

86%

Body biomarker
uDS
At Week 24, uDS was reduced by

91%

Data Limitations
The relationship between changes in urine HS, urine DS, and total urine GAG levels to clinical response has not been established.