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Zilganersen · Zanvastro, ION373

Oligonucleotide (Antisense oligonucleotide) · Gene silencing: GFAP · developed by Ionis Pharms

Approved FDA, Sep 2026
IONS Developer
1 Registered trials

What is Zilganersen?

Zilganersen is an antisense oligonucleotide administered by intrathecal injection. It is being studied in Alexander Disease, a rare neurological disorder.

Summary written with AI from the sources listed at the end of this page.

At a glance

Also known as
Zanvastro, ION373
Drug type
Oligonucleotide (Antisense oligonucleotide)
Targets
GFAP
Mechanism
Gene silencing: GFAP
Therapy area
Neurology
Developer
Ionis Pharms Inc (IONS)
FDA status
Approved as Zanvastro (September 3, 2026), NDA220210
UNII
AXQ9493NT2

🧪 Clinical trials

TrialPhaseConditionStatusSponsor
NCT04849741 Phase 3 Alexander Disease Active not recruiting IONS

Trials of the companies BioRadar tracks, from ClinicalTrials.gov, most advanced phase first.

Conditions studied

Alexander Disease

More from Ionis Pharms

Sources

Updated Oct 3, 2026. Something wrong or missing? Report it on the IONS page.

Follow IONS, the company behind Zilganersen

See IONS's upcoming FDA decisions, trial readouts, cash runway and dilution risk, updated every day from SEC, FDA and ClinicalTrials.gov filings.

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Data: FDA (Drugs@FDA, Purple Book, DailyMed), NIH (NCI Thesaurus, GSRS, RxNorm), ClinicalTrials.gov • Informational purposes only, not medical or investment advice. • All drugs A–Z

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