DrugDashboards

Chlorzoxazone

Chlorzoxazone · CHLORZOXAZONE 375 mg/1 · Tablet · Oral · Endo USA, Inc.

NDC 00254-2053-01 · 100 TABLET in 1 BOTTLE · ANDA · View full market →

The short version

18 companies supply this market — deep enough that no single failure threatens the supply. The price is up 13% over the past year, to $0.6665 per unit. Put together: this looks like a healthy supply — the boring kind, which is exactly what you want.

The numbers behind every sentence are on this page below — and the Watch button emails you when any of them move.

One drug, every price

The same NDC has different prices depending on who is paying. Units differ between rungs — compare within a rung over time, not rung against rung, unless the units match.

ⓘ How this was built
Data sources
  • CMS NADAC (pharmacy acquisition, weekly)
  • CMS Part B ASP quarterly payment limits
  • CMS Maximum Fair Prices (IRA negotiated, NDC-level)
  • Medicare Part D Spending by Drug (data.cms.gov, name-matched)
  • VA FSS / Big4 federal contract prices (va.gov, twice monthly)
  • ACA Federal Upper Limits + weighted AMP (data.medicaid.gov, monthly)
  • California SB-17 WAC filings (list price, per package)
Method

Each rung is the newest figure for this NDC from one federal price system, shown with its own unit. Part D is matched by drug name because CMS publishes no NDCs there; it is gross spending, before confidential rebates.

Pipeline and calculations built by Claude (Fable 5) from the public datasets above. Educational only — verify against primary sources before acting.

  • Pharmacies pay (NADAC)$0.6665per EAinvoice-surveyed acquisition cost · Aug 19, 2026
  • Part D plans paid (avg)$2.17per dosage unitgross, before rebates — matched by drug name · 2024
  • Medicaid generic ceiling (FUL)$0.6665per TABweighted avg manufacturer price $0.1983 · Aug 1, 2026100% of what pharmacies pay — higher than 10% of drugs with this benchmark

Medicare Part D

No Medicare Part D plan in CMS's quarterly files lists this product. That usually means it is discontinued, a repackager's listing, or a product no plan has added to its formulary.

How Part D pricing works →

NADAC price per unit

$0$1.00$2.00$3.00Apr 2024Sep 2026$0.6665
17 price points · per EA · dashed = manufacturer avg (WAMP)Source: CMS NADAC

Estimated fill cost

#30 count
$20.00
#90 count
$59.99

Estimates: latest NADAC unit price × quantity. Pharmacy acquisition cost only — excludes dispensing fees, markup, and insurance terms.

Medicaid spend (2025)

$51,781
338 prescriptions paid by Medicaid nationally · all Medicaid spend →

Supply fragility

0● Low risk

Nothing here is signaling trouble: several manufacturers, no current shortage, no recent serious recalls, stable pricing. In drug supply, boring is the good outcome.

The score counts pressure that is already visible — fewer makers, shortages, recalls, falling prices. 0 means none of it; 100 means all of it at once. Recomputed daily · as of Sep 3, 2026

90-day shortage risk (model v2)

0.1%chance of a new FDA shortage posting for chlorzoxazone (oral solid) in the next 90 days

sole-source market

For scale: the typical drug’s chance is about 0.1% — this one is in ordinary territory.

Backtested statistical model over the whole market, not this package alone. Model details →

Regulatory

Application
ANDA212743
TE code
AB
Approval date
Nov 2, 2020
Patents / exclusivity
None on file

Shortage history

No FDA shortage reports for this drug or its presentations.

Recalls (this NDC)

No enforcement reports list this package NDC.

Manufacturers of Chlorzoxazone (Tablet)

LabelerStrengthFirst seenLast seen
A-S Medication SolutionsCHLORZOXAZONE 500 mg/1Jul 15, 2026Sep 3, 2026
Actavis Pharma, Inc.CHLORZOXAZONE 500 mg/1Jul 15, 2026Sep 3, 2026
Aurobindo Pharma LimitedCHLORZOXAZONE 750 mg/1Jul 15, 2026Sep 3, 2026
Aurobindo Pharma LimitedCHLORZOXAZONE 500 mg/1Jul 15, 2026Sep 3, 2026
Bryant Ranch PrepackCHLORZOXAZONE 500 mg/1Jul 15, 2026Sep 3, 2026
Proficient Rx LPCHLORZOXAZONE 500 mg/1Jul 15, 2026Sep 3, 2026
Advanced Rx of Tennessee, LLCCHLORZOXAZONE 750 mg/1Jul 15, 2026Sep 2, 2026
Advanced Rx of Tennessee, LLCCHLORZOXAZONE 375 mg/1Jul 15, 2026Sep 2, 2026
Advanced Rx of Tennessee, LLCCHLORZOXAZONE 500 mg/1Jul 15, 2026Sep 2, 2026
Advanced Rx Pharmacy of Tennessee, LLCCHLORZOXAZONE 500 mg/1Jul 15, 2026Sep 2, 2026
Camber Pharmaceuticals, Inc.CHLORZOXAZONE 250 mg/1Jul 15, 2026Sep 2, 2026
Cintex Services, LLCCHLORZOXAZONE 250 mg/1Jul 15, 2026Sep 2, 2026
Cintex Services, LLCCHLORZOXAZONE 500 mg/1Jul 15, 2026Sep 2, 2026
Endo USA, Inc.CHLORZOXAZONE 750 mg/1Jul 15, 2026Sep 2, 2026
Endo USA, Inc.CHLORZOXAZONE 375 mg/1Jul 15, 2026Sep 2, 2026
Happy Robin, LLCCHLORZOXAZONE 250 mg/1Jul 15, 2026Sep 2, 2026
Lifsa Drugs LLCCHLORZOXAZONE 250 mg/1Jul 15, 2026Sep 2, 2026
Mayne Pharma Commercial LLCCHLORZOXAZONE 500 mg/1Jul 15, 2026Sep 2, 2026
Novitium Pharma LLCCHLORZOXAZONE 500 mg/1Jul 15, 2026Sep 2, 2026
PD-Rx Pharmaceuticals, Inc.CHLORZOXAZONE 500 mg/1Jul 15, 2026Sep 2, 2026
Remedyrepack Inc.CHLORZOXAZONE 500 mg/1Jul 15, 2026Sep 2, 2026
Rising Pharma Holdings, Inc.CHLORZOXAZONE 500 mg/1Jul 15, 2026Sep 2, 2026
Rising Pharma Holdings, Inc.CHLORZOXAZONE 250 mg/1Jul 15, 2026Sep 2, 2026
Rising Pharma Holdings, Inc.CHLORZOXAZONE 750 mg/1Jul 15, 2026Sep 2, 2026
Rising Pharma Holdings, Inc.CHLORZOXAZONE 375 mg/1Jul 15, 2026Sep 2, 2026
SolubiomixCHLORZOXAZONE 250 mg/1Jul 15, 2026Sep 2, 2026
Aurobindo Pharma LimitedCHLORZOXAZONE 375 mg/1Jul 15, 2026Aug 28, 2026

Roster from daily NDC Directory diffs — first/last seen dates start July 2026.

Cite this page

DrugDashboards, "Chlorzoxazone — NDC 00254-2053-01," retrieved September 3, 2026, https://drugdashboards.com/drug/00254205301.

Free to cite with attribution — see how the data is put together.