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Data updated: Mar 10, 2026

PLEGRIDY

PEGINTERFERON BETA-1A
Neurology Approved 2014-08-15

PLEGRIDY is an interferon beta indicated for the treatment of relapsing forms of multiple sclerosis (MS) in adult patients. The therapy is specifically approved for individuals with clinically isolated syndrome, relapsing-remitting disease, and active secondary progressive disease. It serves as a therapeutic option for managing these various manifestations of relapsing MS within the adult population.

Source: FDA Label • Biogen • Interferon beta

How PLEGRIDY Works

PLEGRIDY is classified as an interferon beta. The specific mechanism by which the drug exerts its therapeutic effects in patients with multiple sclerosis is currently unknown. Consequently, the precise biological targets and the exact pathways through which the medication produces its clinical effect have not been established.

Source: FDA Label
3
Indications
--
Phase 3 Trials
11
Years on Market

Details

Status
Prescription
First Approved
2014-08-15
Routes
INJECTION
Dosage Forms
INJECTABLE

Companies

Active Ingredient: PEGINTERFERON BETA-1A

PLEGRIDY Approval History

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What PLEGRIDY Treats

4 indications

PLEGRIDY is approved for 4 conditions since its original approval in 2014. These indications span multiple therapeutic areas including oncology, immunology, and more.

  • Multiple Sclerosis
  • Clinically Isolated Syndrome
  • Relapsing-Remitting Disease
  • Secondary Progressive Disease
Source: FDA Label

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Active Pipeline

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Ongoing clinical trials by development phase

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Key Completed Trials

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Completed studies with published results, ranked by significance

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Trial Timeline

Full development history with FDA approval milestones

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Understanding FDA Approval Types
Count Type What it means
- ORIG Original approval - drug first enters market
- SUPPL - Efficacy New indication (new disease/condition approved)
- SUPPL - Labeling Label text changes (warnings, dosing updates)
- SUPPL - Manufacturing Production changes (new facility)
- SUPPL - Chemistry Formulation changes (new dosage strength)

Green lines in the timeline show ORIG and Efficacy approvals - the clinically meaningful milestones.

PLEGRIDY FDA Label Details

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Indications & Usage

FDA Label (PDF)

PLEGRIDY is indicated for the treatment of relapsing forms of multiple sclerosis (MS), to include clinically isolated syndrome, relapsing-remitting disease, and active secondary progressive disease, in adults. PLEGRIDY is an interferon beta indicated for the treatment of relapsing forms of multiple sclerosis (MS), to include clinically isolated syndrome, relapsing-remitting disease, and active secondary progressive disease, in adults

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Data Sources

Data sourced from official FDA and NIH databases. Click links to verify on original sources.