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Live data · NADAC + Part D CY24 · reviewed daily

Dichlorphenamide (Keveyis)

Carbonic Anhydrase Inhibitor class · 2 generic manufacturers · 2 ANDAs filed at FDA.

First FDA approval2021-12-13
Generic availableYes · 2 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

$37.3M in CY2024 Part D spend1K claims · 230 beneficiaries · 329 plans surveyed

Lowest NADAC
/unit
0 NDCs benchmarked, lowest of all strengths.
Average NADAC
Across all dosage forms in distribution.
Highest NADAC
Range is tight.
Plans with PA
44 / 329
Limited PA friction.

Questions a plan sponsor actually asks.

FAQPage schema11 entries indexed · 4 visible
What is Dichlorphenamide used for?

Dichlorphenamide is a Carbonic Anhydrase Inhibitor medication tracked in Medicare Part D.

Is there a generic for Dichlorphenamide?

Yes. 2 ANDAs filed at FDA, 2 generic manufacturers currently shipping.

How much does my plan pay for Dichlorphenamide?

NADAC pricing data not currently available for this drug.

Is Dichlorphenamide on the FDA shortage list?

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

7 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.

Carbonic Anhydrase Inhibitor6 alternatives in D1
01
Acetazolamide
Brand: Acetazolamide
$0.100Lowest NADAC
26Generic mfrs
$22.7MCY24 Part D spend
Compare →
02
Acetazolamide Extended-Release
Carbonic Anhydrase Inhibitor
$0.290Lowest NADAC
0Generic mfrs
CY24 Part D spend
Compare →
03
Brinzolamide
Brand: Azopt
$10.16Lowest NADAC
2Generic mfrs
$75.2MCY24 Part D spend
Compare →
04
Brinzolamide and Brimonidine
Brand: SIMBRINZA
$26.07Lowest NADAC
0Generic mfrs
CY24 Part D spend
Compare →
05
Dorzolamide
Brand: Dorzolamide Hydrochloride
$0.897Lowest NADAC
9Generic mfrs
$32.3MCY24 Part D spend
Compare →
06
Dorzolamide and Timolol
Brand: COSOPT
$0.943Lowest NADAC
0Generic mfrs
CY24 Part D spend
Compare →

Sources · every number above traces back.

Last refresh30 May 2026

Drug identity, dosage forms, brand names: openFDA NDC Directory · First approval, ANDA history: FDA Orange Book (3 approvals on file) · NADAC unit costs: CMS NADAC weekly file · 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.