$45.5M in CY2024 Part D spend19K claims · 4K beneficiaries · 329 plans surveyed
Questions a plan sponsor actually asks.
What is Zileuton used for?
Zileuton is a 5-Lipoxygenase Inhibitor medication tracked in Medicare Part D.
Is there a generic for Zileuton?
Yes. 4 ANDAs filed at FDA, 4 generic manufacturers currently shipping.
How much does my plan pay for Zileuton?
Across 329 Part D plans, Zileuton averages $2.24/unit (NADAC). Lowest available: $2.24/unit. Highest in distribution: $2.24/unit.
Is Zileuton on the FDA shortage list?
Zileuton has been discontinued by its manufacturer(s).
6 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.
Sources · every number above traces back.
Drug identity, dosage forms, brand names: openFDA NDC Directory · First approval, ANDA history: FDA Orange Book (4 approvals on file) · NADAC unit costs: CMS NADAC weekly file (4 NDCs benchmarked) · 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.