$735,222 in CY2024 Part D spend53K claims · 20K beneficiaries · 329 plans surveyed
Questions a plan sponsor actually asks.
What is Isoniazid used for?
Isoniazid is a Antimycobacterial medication tracked in Medicare Part D.
Is there a generic for Isoniazid?
Yes. 7 ANDAs filed at FDA, 5 generic manufacturers currently shipping.
How much does my plan pay for Isoniazid?
Across 329 Part D plans, Isoniazid averages $2.89/unit (NADAC). Lowest available: $1.65/unit. Highest in distribution: $3.23/unit.
Is Isoniazid on the FDA shortage list?
Isoniazid has been discontinued by its manufacturer(s).
5 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.
Sources · every number above traces back.
Drug identity, dosage forms, brand names: openFDA NDC Directory · First approval, ANDA history: FDA Orange Book (7 approvals on file) · NADAC unit costs: CMS NADAC weekly file (14 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.