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RxCUI Directory

An RxCUI is the U.S. National Library of Medicine’s universal ID for one drug concept — an ingredient, a brand name, or a specific strength-and-form combination. Every concept page here connects that identifier to its FDA-listed products, package NDCs, NADAC pricing, and HCPCS billing codes, so other pages on this site can link a code straight to its meaning.

This page is curated, coded, and maintained by

Compiled from the public NLM RxNorm vocabulary and the FDA openFDA NDC directory. Editorial policy

One page for every drug concept in current FDA listings. Most are clinical drugs (TTY SCD: ingredient + strength + dose form, like ibuprofen 200 MG oral tablet) and branded drugs (SBD: the same drug under its brand name), plus multi-drug packs. The clinical drug is the anchor level where products, package NDCs, pricing, and billing line up.

Key Stats

16,643
Drug concepts
83,174
FDA products mapped
368,539
Package NDCs
Jul 14, 2026
Source data

Our RxCUI Database: Every Drug Concept Behind Current FDA Listings

What an RxCUI is, what a TTY is, and how to read every code in this directory — a two-minute primer. New to RxCUIs? Start here

Two things run this whole directory: the RxCUI and its TTY. An RxCUI is just a number — one number for one exact drug concept in RxNorm (the U.S. National Library of Medicine’s standard drug vocabulary). But the numbers all look alike: 5640, 198440, 310965 — nothing in the digits tells you what any of them is.

That is the job of the TTY (term type).

The TTY is the label that says whether an RxCUI is a bare ingredient, a brand name, or an exact ingredient + strength + form. Same-looking numbers, completely different meanings — the TTY is the key. So the habit for every RxCUI is simple: read the number, then read the TTY.

Same Medicine, Several RxCUIs — the TTY Tells Them Apart

Ibuprofen isn’t one code. Each layer of it is its own RxCUI, and only the TTY says which layer you’re looking at:

5640TTY INibuprofen — the bare ingredient
310965TTY SCDibuprofen 200 MG oral tablet — one exact clinical drug
153010TTY BN“Advil” — the brand name is its own RxCUI, tagged BN
153008TTY SBDibuprofen 200 MG Oral Tablet [Advil] — the same clinical drug under its brand — is yet another, tagged SBD
The concept types (TTYs) you’ll see in this directory

Every browse row below shows its TTY — click any code to jump to its definition here.

The Active Ingredient

IN · PIN · MIN — the substance itself, before strength or form.
IN
Ingredient

The active drug substance itself — no strength, form, or brand attached. Example: ibuprofen.

PIN
Precise ingredient

A specific form of an ingredient, such as a particular salt. Example: ibuprofen lysine.

MIN
Ingredient combination

Two or more active ingredients named together. Example: amlodipine / valsartan.

Generic (Clinical) Drugs

SCD and friends — ingredient + strength + dose form, unbranded.
SCD
Clinical drug

Ingredient + strength + dose form, unbranded. Example: ibuprofen 200 MG oral tablet.

SCDC
Clinical drug component

An ingredient at a specific strength, before a dose form is added.

SCDF
Clinical dose form

An ingredient in a dose form, without a specific strength.

SCDG
Clinical drug group

A grouping of related clinical drugs.

Brand-Name Drugs

BN · SBD and friends — trade names and branded drugs.
BN
Brand name

A trade name for a drug. Example: Advil.

SBD
Branded drug

Brand + ingredient + strength + form. Example: ibuprofen 200 MG oral tablet [Advil].

SBDF
Branded dose form

A brand in a dose form, without a specific strength.

SBDG
Branded drug group

A grouping of related branded drugs.

Multi-Drug Packs

GPCK · BPCK — sets of drugs packaged and sold together.
GPCK
Generic pack

A set of generic drugs packaged together, such as a dose-taper pack.

BPCK
Branded pack

A branded multi-drug pack.

Dose-Form Vocabulary

DF · DFG — tablets, solutions, and their broader families.
DF
Dose form

A form a medicine takes — tablet, solution, injection, and so on.

DFG
Dose-form group

A broader family of related dose forms.

🕸️ Reading a Concept Web

This is the interactive map you’ll find on every concept page — here shown for ibuprofen. One RxCUI never lives alone: follow the path from the raw ingredient down to the exact strength-and-form concepts FDA products carry. Hover or focus any chip for what it means.
The example concept Ibuprofen RxCUI 5640

Every web starts here: one RxCUI, one fixed meaning in the RxNorm vocabulary.

  1. Brand names (BN) 1

    BN, a brand name: the trade name alone — no strength, no form.

    • Advil 153010
  2. Dose form (DF) 1

    DF, a dose form: the bare form these come in — Oral Tablet is one concept shared by every oral-tablet drug, not unique to ibuprofen.

    • Oral Tablet 317541
  3. Clinical drugs (SCD) 4

    SCD, a clinical drug: ingredient + strength + dose form. The concept FDA product data attaches to most precisely.

    • Ibuprofen 200 MG Oral Tablet 310965
    • Ibuprofen 400 MG Oral Tablet 197805
    • Ibuprofen 600 MG Oral Tablet 197806
    • Ibuprofen 800 MG Oral Tablet 197807
  4. Branded drugs (SBD) 4

    SBD, a branded drug: that exact clinical drug under a brand name.

    • Ibuprofen 200 MG Oral Tablet [Advil] 153008
    • Ibuprofen 200 MG Oral Tablet [Genpril] 206886
    • Ibuprofen 600 MG Oral Tablet [Ibu] 206913
    • Ibuprofen 800 MG Oral Tablet [Ibu] 206917

A trimmed illustration for teaching. Every chip here is a real, verified RxNorm concept with its RxCUI printed. A real concept page draws the live web for its own RxCUI, one chip per stored related concept.
These are official RxNorm vocabulary relationships: how concepts name and organize the same drug. They do not establish therapeutic equivalence or substitutability. Two concepts appearing in one web is never a statement that products can be swapped.

Browse Concepts — 16,643 concepts in the current snapshot

TTY

Ordered by how many FDA products carry each concept. Clinical drugs (SCD: one exact ingredient + strength + dose form, such as ibuprofen 200 MG oral tablet) and branded drugs (SBD: the same drug under its brand name) lead the list, because those are the concepts FDA product listings name. The TTY column shows each row’s type — click any code to see what it means.

RxCUI Official name TTY Concept type Products Packages
198250 Tetracycline hydrochloride 250 MG Oral Capsule SCD Clinical drug 15 32 View →
668956 Arformoterol 0.0075 MG/ML Inhalation Solution SCD Clinical drug 15 31 View →
199150 Acarbose 100 MG Oral Tablet SCD Clinical drug 15 30 View →
2056462 Levothyroxine sodium 0.025 MG/ML Oral Solution SCD Clinical drug 15 30 View →
2056466 Levothyroxine sodium 0.025 MG/ML Oral Solution [Tirosint] SBD Branded drug 15 30 View →
2056468 Levothyroxine sodium 0.05 MG/ML Oral Solution SCD Clinical drug 15 30 View →
2056470 Levothyroxine sodium 0.05 MG/ML Oral Solution [Tirosint] SBD Branded drug 15 30 View →
2056472 Levothyroxine sodium 0.075 MG/ML Oral Solution SCD Clinical drug 15 30 View →
2056474 Levothyroxine sodium 0.075 MG/ML Oral Solution [Tirosint] SBD Branded drug 15 30 View →
2056476 Levothyroxine sodium 0.088 MG/ML Oral Solution SCD Clinical drug 15 30 View →
2056478 Levothyroxine sodium 0.088 MG/ML Oral Solution [Tirosint] SBD Branded drug 15 30 View →
2056480 Levothyroxine sodium 0.1 MG/ML Oral Solution SCD Clinical drug 15 30 View →
2056482 Levothyroxine sodium 0.1 MG/ML Oral Solution [Tirosint] SBD Branded drug 15 30 View →
2056484 Levothyroxine sodium 0.112 MG/ML Oral Solution SCD Clinical drug 15 30 View →
2056486 Levothyroxine sodium 0.112 MG/ML Oral Solution [Tirosint] SBD Branded drug 15 30 View →
2056488 Levothyroxine sodium 0.125 MG/ML Oral Solution SCD Clinical drug 15 30 View →
2056490 Levothyroxine sodium 0.125 MG/ML Oral Solution [Tirosint] SBD Branded drug 15 30 View →
2056492 Levothyroxine sodium 0.013 MG/ML Oral Solution SCD Clinical drug 15 30 View →
2056494 Levothyroxine sodium 0.013 MG/ML Oral Solution [Tirosint] SBD Branded drug 15 30 View →
2056496 Levothyroxine sodium 0.137 MG/ML Oral Solution SCD Clinical drug 15 30 View →
2056498 Levothyroxine sodium 0.137 MG/ML Oral Solution [Tirosint] SBD Branded drug 15 30 View →
2056500 Levothyroxine sodium 0.15 MG/ML Oral Solution SCD Clinical drug 15 30 View →
2056502 Levothyroxine sodium 0.15 MG/ML Oral Solution [Tirosint] SBD Branded drug 15 30 View →
2056504 Levothyroxine sodium 0.175 MG/ML Oral Solution SCD Clinical drug 15 30 View →
2056506 Levothyroxine sodium 0.175 MG/ML Oral Solution [Tirosint] SBD Branded drug 15 30 View →
2056508 Levothyroxine sodium 0.2 MG/ML Oral Solution SCD Clinical drug 15 30 View →
2056510 Levothyroxine sodium 0.2 MG/ML Oral Solution [Tirosint] SBD Branded drug 15 30 View →
2566608 Levothyroxine sodium 0.0625 MG/ML Oral Solution SCD Clinical drug 15 30 View →
2566610 Levothyroxine sodium 0.0625 MG/ML Oral Solution [Tirosint] SBD Branded drug 15 30 View →
2566613 Levothyroxine sodium 0.0375 MG/ML Oral Solution SCD Clinical drug 15 30 View →
2566615 Levothyroxine sodium 0.0375 MG/ML Oral Solution [Tirosint] SBD Branded drug 15 30 View →
2566617 Levothyroxine sodium 0.044 MG/ML Oral Solution SCD Clinical drug 15 30 View →
2566619 Levothyroxine sodium 0.044 MG/ML Oral Solution [Tirosint] SBD Branded drug 15 30 View →
2634743 Once-Daily gabapentin 900 MG Oral Tablet SCD Clinical drug 15 29 View →
2634747 Once-Daily gabapentin 450 MG Oral Tablet SCD Clinical drug 15 29 View →
2634751 Once-Daily gabapentin 750 MG Oral Tablet SCD Clinical drug 15 29 View →
562524 12 HR acetazolamide 500 MG Extended Release Oral Capsule SCD Clinical drug 15 29 View →
1246319 Formoterol fumarate 0.01 MG/ML Inhalation Solution SCD Clinical drug 15 28 View →
849827 Hyponatremia tolvaptan 15 MG Oral Tablet SCD Clinical drug 15 28 View →
849833 Hyponatremia tolvaptan 30 MG Oral Tablet SCD Clinical drug 15 28 View →
312085 Ondansetron 0.8 MG/ML Oral Solution SCD Clinical drug 15 27 View →
313566 Valganciclovir 450 MG Oral Tablet SCD Clinical drug 15 26 View →
897122 3 ML liraglutide 6 MG/ML Pen Injector SCD Clinical drug 15 26 View →
1000992 Oxymetazoline hydrochloride 0.5 MG/ML Nasal Spray [Afrin] SBD Branded drug 15 25 View →
1358617 Methylprednisolone acetate 80 MG/ML Injectable Suspension SCD Clinical drug 15 25 View →
486515 Sodium chloride 0.154 MEQ/ML Irrigation Solution SCD Clinical drug 15 25 View →
884308 Nystatin 100 UNT/MG Topical Ointment SCD Clinical drug 15 25 View →
1099687 Valproic acid 50 MG/ML Oral Solution SCD Clinical drug 15 24 View →
1592279 Pirfenidone 267 MG Oral Capsule SCD Clinical drug 15 24 View →
1736919 1 ML paricalcitol 0.005 MG/ML Injection SCD Clinical drug 15 24 View →
1736931 1 ML paricalcitol 0.002 MG/ML Injection SCD Clinical drug 15 24 View →
200321 Paricalcitol 0.005 MG/ML Injectable Solution SCD Clinical drug 15 24 View →
702316 Aspirin 500 MG / caffeine 32.5 MG Oral Tablet SCD Clinical drug 15 24 View →
828555 Acetaminophen 32 MG/ML Oral Suspension [Tylenol] SBD Branded drug 15 23 View →
1359028 {21 (ethinyl estradiol 0.03 MG / norethindrone acetate 1.5 MG Oral Tablet) } Pack GPCK Generic pack 15 22 View →
151029 Mometasone furoate 0.001 MG/MG Topical Ointment SCD Clinical drug 15 22 View →
1797865 Mometasone furoate 0.05 MG/ACTUAT Metered Dose Nasal Spray SCD Clinical drug 15 22 View →
197407 Betamethasone 1 MG/ML Topical Cream SCD Clinical drug 15 22 View →
310248 Etoposide 20 MG/ML Injectable Solution SCD Clinical drug 15 22 View →
824295 Rufinamide 200 MG Oral Tablet SCD Clinical drug 15 22 View →

Pages exist only for concepts observed on real FDA product listings.

Where does this data come from?
Concept identity, names, and relationships come from the NLM RxNorm vocabulary; product and package mappings from the FDA openFDA NDC Directory. Each directory generation is validated and published as one immutable snapshot. This product uses publicly available data from the U.S. National Library of Medicine (NLM), National Institutes of Health, Department of Health and Human Services; NLM is not responsible for the product and does not endorse or recommend this or any other product.