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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
966241 Levothyroxine sodium 0.2 MG Oral Tablet [Unithroid] SBD Branded drug 12 12 View →
966243 Levothyroxine sodium 0.3 MG Oral Tablet [Unithroid] SBD Branded drug 12 12 View →
966244 Levothyroxine sodium 0.05 MG Oral Tablet [Unithroid] SBD Branded drug 12 12 View →
966246 Levothyroxine sodium 0.175 MG Oral Tablet [Unithroid] SBD Branded drug 12 12 View →
966286 Levothyroxine sodium 0.075 MG Oral Tablet [Unithroid] SBD Branded drug 12 12 View →
966436 Levothyroxine sodium 0.137 MG Oral Tablet [Unithroid] SBD Branded drug 12 12 View →
996558 1 ML somatropin 12 MG/ML Cartridge SCD Clinical drug 12 12 View →
996559 1 ML somatropin 12 MG/ML Cartridge [Genotropin] SBD Branded drug 12 12 View →
104208 2 ML digoxin 0.25 MG/ML Injection SCD Clinical drug 12 11 View →
2602363 20 ML pemetrexed 25 MG/ML Injection SCD Clinical drug 12 11 View →
2602365 40 ML pemetrexed 25 MG/ML Injection SCD Clinical drug 12 11 View →
2602366 4 ML pemetrexed 25 MG/ML Injection SCD Clinical drug 12 11 View →
995607 Ethambutol hydrochloride 400 MG Oral Tablet SCD Clinical drug 12 10 View →
284548 Ziprasidone 40 MG Oral Capsule [Geodon] SBD Branded drug 12 9 View →
284549 Ziprasidone 60 MG Oral Capsule [Geodon] SBD Branded drug 12 9 View →
284550 Ziprasidone 80 MG Oral Capsule [Geodon] SBD Branded drug 12 9 View →
285127 Ziprasidone 20 MG Oral Capsule [Geodon] SBD Branded drug 12 9 View →
352228 Ziprasidone 20 MG Injection [Geodon] SBD Branded drug 12 9 View →
485471 Hydrochlorothiazide 25 MG / irbesartan 300 MG Oral Tablet SCD Clinical drug 11 40 View →
197853 Ketoconazole 200 MG Oral Tablet SCD Clinical drug 11 34 View →
861822 Metformin hydrochloride 850 MG / pioglitazone 15 MG Oral Tablet SCD Clinical drug 11 34 View →
1020026 Cetirizine hydrochloride 10 MG Oral Tablet [Zyrtec] SBD Branded drug 11 32 View →
199310 Azathioprine 25 MG Oral Tablet SCD Clinical drug 11 31 View →
349253 Bosentan 62.5 MG Oral Tablet SCD Clinical drug 11 31 View →
656659 Bosentan 125 MG Oral Tablet SCD Clinical drug 11 31 View →
861434 Clobetasol propionate 0.0005 MG/MG Topical Gel SCD Clinical drug 11 31 View →
198238 Sulindac 150 MG Oral Tablet SCD Clinical drug 11 30 View →
1099681 Valproic acid 250 MG Oral Capsule SCD Clinical drug 11 28 View →
311204 Itraconazole 100 MG Oral Capsule SCD Clinical drug 11 27 View →
864675 Atovaquone 250 MG / proguanil hydrochloride 100 MG Oral Tablet SCD Clinical drug 11 26 View →
997422 Fexofenadine hydrochloride 180 MG Oral Tablet [Allegra] SBD Branded drug 11 26 View →
1043690 Hydrocortisone acetate 10 MG/ML Topical Cream SCD Clinical drug 11 25 View →
1092378 Acetaminophen 500 MG / diphenhydramine hydrochloride 25 MG Oral Tablet [Tylenol PM] SBD Branded drug 11 25 View →
1232088 Rivaroxaban 20 MG Oral Tablet [Xarelto] SBD Branded drug 11 25 View →
1049072 Petrolatum 0.76 MG/MG Topical Ointment SCD Clinical drug 11 24 View →
1293430 Menthol 145 MG/ML / methyl salicylate 300 MG/ML Topical Oil SCD Clinical drug 11 24 View →
1293435 Menthol 145 MG/ML / methyl salicylate 300 MG/ML Topical Oil [Eagle Brand Medicated Oil] SBD Branded drug 11 24 View →
197575 Desoximetasone 0.0025 MG/MG Topical Ointment SCD Clinical drug 11 24 View →
415975 Menthol 0.05 MG/MG Topical Gel SCD Clinical drug 11 24 View →
197554 Danazol 100 MG Oral Capsule SCD Clinical drug 11 23 View →
197555 Danazol 200 MG Oral Capsule SCD Clinical drug 11 23 View →
198224 Hydrochlorothiazide 25 MG / spironolactone 25 MG Oral Tablet SCD Clinical drug 11 23 View →
1100650 Carboxymethylcellulose sodium 5 MG/ML / glycerin 9 MG/ML Ophthalmic Solution SCD Clinical drug 11 22 View →
1797059 Zinc oxide 0.4 MG/MG Paste [Desitin] SBD Branded drug 11 22 View →
198232 Sulfasalazine 500 MG Oral Tablet SCD Clinical drug 11 22 View →
2572292 0.4 ML cyclosporine 0.5 MG/ML Ophthalmic Suspension SCD Clinical drug 11 22 View →
418475 Clotrimazole 0.01 MG/MG Topical Ointment SCD Clinical drug 11 22 View →
966157 Levothyroxine sodium 0.025 MG Oral Tablet [Levoxyl] SBD Branded drug 11 22 View →
966164 Levothyroxine sodium 0.05 MG Oral Tablet [Levoxyl] SBD Branded drug 11 22 View →
966170 Levothyroxine sodium 0.075 MG Oral Tablet [Levoxyl] SBD Branded drug 11 22 View →
966175 Levothyroxine sodium 0.088 MG Oral Tablet [Levoxyl] SBD Branded drug 11 22 View →
966184 Levothyroxine sodium 0.112 MG Oral Tablet [Levoxyl] SBD Branded drug 11 22 View →
966190 Levothyroxine sodium 0.125 MG Oral Tablet [Levoxyl] SBD Branded drug 11 22 View →
966194 Levothyroxine sodium 0.137 MG Oral Tablet [Levoxyl] SBD Branded drug 11 22 View →
966200 Levothyroxine sodium 0.15 MG Oral Tablet [Levoxyl] SBD Branded drug 11 22 View →
966204 Levothyroxine sodium 0.175 MG Oral Tablet [Levoxyl] SBD Branded drug 11 22 View →
966211 Levothyroxine sodium 0.2 MG Oral Tablet [Levoxyl] SBD Branded drug 11 22 View →
966283 Levothyroxine sodium 0.1 MG Oral Tablet [Levoxyl] SBD Branded drug 11 22 View →
994435 Aspirin 845 MG / caffeine 65 MG Oral Powder SCD Clinical drug 11 22 View →
1663745 Adapalene 0.003 MG/MG / benzoyl peroxide 0.025 MG/MG Topical Gel SCD Clinical drug 11 21 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.