Live data · NADAC + Part D CY24 · reviewed daily

Ammonium

First FDA approval2003-04-10
Generic availableYes · 4 mfrs
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
Lowest NADAC
$0.057/unit
8 NDCs benchmarked, lowest of all strengths.
Average NADAC
$0.067
Across all dosage forms in distribution.
Highest NADAC
$0.073
Range is tight.
Plans with PA
2 / 329
Limited PA friction.

Questions a plan sponsor actually asks.

FAQPage schema6 entries indexed · 4 visible
What is Ammonium used for?

Ammonium is tracked in Medicare Part D. Specific indication information is not available in our current dataset.

Sources: CMS Part D Spending CY24 · CMS NADAC weekly · FDA Orange Book
Is there a generic for Ammonium?

Yes. 6 ANDAs filed at FDA, 4 generic manufacturers currently shipping.

Sources: CMS Part D Spending CY24 · CMS NADAC weekly · FDA Orange Book
How much does my plan pay for Ammonium?

Across 329 Part D plans, Ammonium averages $0.067/unit (NADAC). Lowest available: $0.057/unit. Highest in distribution: $0.073/unit.

Sources: CMS Part D Spending CY24 · CMS NADAC weekly · FDA Orange Book
Is Ammonium on the FDA shortage list?

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

Sources: CMS Part D Spending CY24 · CMS NADAC weekly · FDA Orange Book

2 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.

Related questions.

Q&A librarySourced · reviewed quarterly
pricingWhat is NADAC?pricingIs NADAC the same as my PBM cost?pricingWhat is spread pricing?pricingWhat is a NADAC pass-through PBM contract?pricingWhat's the difference between AWP, MAC, and NADAC?pricingWhat is a dispensing fee in a PBM contract?
Browse all canonical questions →

Sources · every number above traces back.

Last refresh15 Oct 2026

Drug identity, dosage forms, brand names: openFDA NDC Directory · First approval, ANDA history: FDA Orange Book (6 approvals on file) · NADAC unit costs: CMS NADAC weekly file (8 NDCs benchmarked) · Formulary tier and PA placement: CMS Part D Formulary file (329 plans) · Annualized spend, claims, beneficiaries: CMS Part D Spending Dashboard · Shortage status: FDA Drug Shortage Database · 340B exposure: HRSA OPAIS. Methodology and reproducibility notes on /methodology.