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Live data · NADAC + Part D CY24 · reviewed daily

Zanamivir (RELENZA)

Neuraminidase Inhibitor class · 0 generic manufacturers · 0 ANDAs filed at FDA.

First FDA approval1999-09-22
Generic availableNo (brand-only)
Shortage statusNone
340B exposureunknown
Last updated
NADAC: weekly (every Wed)Part D Formulary: quarterlyPart D Spend: annual (CY24)Orange Book: weeklyShortages: daily
At a glance · the numbers a plan sponsor wants on screen one

$24,175 in CY2024 Part D spend377 claims · 242 beneficiaries · 329 plans surveyed

Lowest NADAC
/unit
0 NDCs benchmarked, lowest of all strengths.
Average NADAC
Across all dosage forms in distribution.
Highest NADAC
Range is tight.
Plans with PA
0 / 329
Zero PA friction — switching is purely formulary.

Questions a plan sponsor actually asks.

FAQPage schema11 entries indexed · 4 visible
What is Zanamivir used for?

Zanamivir is a Neuraminidase Inhibitor medication tracked in Medicare Part D.

Is there a generic for Zanamivir?

No. Zanamivir is brand-only with no generic equivalents currently in market.

How much does my plan pay for Zanamivir?

NADAC pricing data not currently available for this drug.

Is Zanamivir on the FDA shortage list?

No. Zanamivir is not currently on the FDA Drug Shortage Database.

7 additional drug-specific questions are indexed in the page's FAQPage schema for search engines and LLM crawlers, beyond what renders visually above. View page source for the complete JSON-LD.

Same class. Different math.

Neuraminidase Inhibitor1 alternative in D1
01
Peramivir
Brand: Rapivab
Lowest NADAC
0Generic mfrs
CY24 Part D spend
Compare →

Sources · every number above traces back.

Last refresh30 May 2026

Drug identity, dosage forms, brand names: openFDA NDC Directory · First approval, ANDA history: FDA Orange Book (1 approvals on file) · NADAC unit costs: CMS NADAC weekly file · Formulary tier and PA placement: CMS Part D Formulary file (329 plans) · Annualized spend, claims, beneficiaries: CMS Part D Spending Dashboard (CY2024) · Shortage status: FDA Drug Shortage Database · 340B exposure: HRSA OPAIS. Methodology and reproducibility notes on /methodology.