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Live data · NADAC + Part D CY24 · reviewed daily

Silodosin (RAPAFLO)

alpha-Adrenergic Blocker class · 10 generic manufacturers · 20 ANDAs filed at FDA.

First FDA approval2009-03-23
Generic availableYes · 10 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

$39.6M in CY2024 Part D spend459K claims · 154K beneficiaries · 329 plans surveyed

Lowest NADAC
$0.272/unit
20 NDCs benchmarked, lowest of all strengths.
Average NADAC
$0.302
Across all dosage forms in distribution.
Highest NADAC
$0.318
Range is tight.
Plans with PA
0 / 329
Zero PA friction — switching is purely formulary.

Questions a plan sponsor actually asks.

FAQPage schema12 entries indexed · 4 visible
What is Silodosin used for?

Silodosin is a alpha-Adrenergic Blocker medication tracked in Medicare Part D.

Is there a generic for Silodosin?

Yes. 20 ANDAs filed at FDA, 10 generic manufacturers currently shipping.

How much does my plan pay for Silodosin?

Across 329 Part D plans, Silodosin averages $0.302/unit (NADAC). Lowest available: $0.272/unit. Highest in distribution: $0.318/unit.

Is Silodosin on the FDA shortage list?

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

8 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.

alpha-Adrenergic Blocker5 alternatives in D1
01
Alfuzosin
Brand: Uroxatral
$0.111Lowest NADAC
4Generic mfrs
$39.8MCY24 Part D spend
Compare →
02
Carvedilol
Brand: Coreg
$0.017Lowest NADAC
12Generic mfrs
$265.2MCY24 Part D spend
Compare →
03
Doxazosin
Brand: Cardura
$0.069Lowest NADAC
9Generic mfrs
$54.9MCY24 Part D spend
Compare →
04
Prazosin
alpha-Adrenergic Blocker
$0.085Lowest NADAC
9Generic mfrs
$37.6MCY24 Part D spend
Compare →
05
Terazosin
Brand: TEZRULY
$0.109Lowest NADAC
5Generic mfrs
$42.2MCY24 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 (10 approvals on file) · NADAC unit costs: CMS NADAC weekly file (20 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.