$24.2M in CY2024 Part D spend95K claims · 33K beneficiaries · 329 plans surveyed
Questions a plan sponsor actually asks.
What is Chlorzoxazone used for?
Chlorzoxazone is a Muscle Relaxant medication tracked in Medicare Part D.
Is there a generic for Chlorzoxazone?
Yes. 28 ANDAs filed at FDA, 11 generic manufacturers currently shipping.
How much does my plan pay for Chlorzoxazone?
Across 329 Part D plans, Chlorzoxazone averages $0.851/unit (NADAC). Lowest available: $0.215/unit. Highest in distribution: $2.60/unit.
Is Chlorzoxazone on the FDA shortage list?
No. Chlorzoxazone is not currently on the FDA Drug Shortage Database.
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.
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 (10 approvals on file) · NADAC unit costs: CMS NADAC weekly file (19 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.