AVLAYAH vs ELAPRASE

Independent side-by-side comparison.

Rated against independent regulatory sources·Last updated August 18, 2026·How we rate

Possible drug interaction. AVLAYAH and ELAPRASE are different prescription medicines. Combining or switching between them can cause interactions — talk to a pharmacist or prescriber before making changes. This page is not medical advice.

Attribute	AVLAYAH	ELAPRASE
Rating	New	New
Pharmacy pays	—	—
Type	RX	RX
Active ingredient	TIVIDENOFUSP ALFA-EKNM	IDURSULFASE
Manufacturer	Denali Therapeutics Inc.	Shire
Dosage forms	Injectable	Solution
Drug class	—	—
Boxed warning	Boxed warning	Boxed warning
Treats	Mucopolysaccharidosis II	Mucopolysaccharidosis II

avlayah elaprase

Rating

New

Pharmacy pays

—

Type

Active ingredient

TIVIDENOFUSP ALFA-EKNM

IDURSULFASE

Manufacturer

Denali Therapeutics Inc.

Shire

Dosage forms

Injectable

Solution

Drug class

—

Boxed warning

Treats

Mucopolysaccharidosis II

Frequently asked questions

What is the difference between Avlayah and Elaprase?

Avlayah contains Tividenofusp Alfa-Eknm, while Elaprase contains Idursulfase — they have different active ingredients.

Ratings are based on FDA regulatory (recall-safety) data. This comparison is for general reference only — not medical advice. Always consult a licensed professional before choosing or switching a medication.