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Live data · NADAC + Part D CY24 · reviewed daily

Phentermine and Topiramate Extended-Release

First FDA approval2025-06-01
Generic availableNo (brand-only)
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
Lowest NADAC
$2.85/unit
4 NDCs benchmarked, lowest of all strengths.
Average NADAC
$3.26
Across all dosage forms in distribution.
Highest NADAC
$3.73
Range is tight.
Plans with PA
0 / 329
Zero PA friction — switching is purely formulary.

Questions a plan sponsor actually asks.

FAQPage schema5 entries indexed · 4 visible
What is Phentermine and Topiramate Extended-Release used for?

Phentermine and Topiramate Extended-Release is a this drug class medication tracked in Medicare Part D.

Sources: CMS Part D Spending CY24 · CMS NADAC weekly · FDA Orange Book
Is there a generic for Phentermine and Topiramate Extended-Release?

No. Phentermine and Topiramate Extended-Release is brand-only with no generic equivalents currently in market.

Sources: CMS Part D Spending CY24 · CMS NADAC weekly · FDA Orange Book
How much does my plan pay for Phentermine and Topiramate Extended-Release?

Across 329 Part D plans, Phentermine and Topiramate Extended-Release averages $3.26/unit (NADAC). Lowest available: $2.85/unit. Highest in distribution: $3.73/unit.

Sources: CMS Part D Spending CY24 · CMS NADAC weekly · FDA Orange Book
Is Phentermine and Topiramate Extended-Release on the FDA shortage list?

No. Phentermine and Topiramate Extended-Release is not currently on the FDA Drug Shortage Database.

Sources: CMS Part D Spending CY24 · CMS NADAC weekly · FDA Orange Book

1 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.

Related questions.

Q&A librarySourced · reviewed quarterly
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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 · NADAC unit costs: CMS NADAC weekly file (4 NDCs benchmarked) · Formulary tier and PA placement: CMS Part D Formulary file (329 plans) · Annualized spend, claims, beneficiaries: CMS Part D Spending Dashboard · Shortage status: FDA Drug Shortage Database · 340B exposure: HRSA OPAIS. Methodology and reproducibility notes on /methodology.