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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
1114485 24 HR pramipexole dihydrochloride 3.75 MG Extended Release Oral Tablet SCD Clinical drug 28 35 View →
1868486 50 ML sodium bicarbonate 84 MG/ML Injection SCD Clinical drug 28 34 View →
242297 Ethinyl estradiol 0.02 MG / levonorgestrel 0.1 MG Oral Tablet SCD Clinical drug 28 34 View →
1049900 Diphenhydramine hydrochloride 12.5 MG Chewable Tablet SCD Clinical drug 28 31 View →
830872 12 HR diltiazem hydrochloride 120 MG Extended Release Oral Capsule SCD Clinical drug 28 31 View →
1010600 Buprenorphine 2 MG / naloxone 0.5 MG Sublingual Film SCD Clinical drug 28 30 View →
1010604 Buprenorphine 8 MG / naloxone 2 MG Sublingual Film SCD Clinical drug 28 29 View →
1600695 Amphetamine sulfate 10 MG Oral Tablet SCD Clinical drug 28 28 View →
1740894 Mitomycin 5 MG Injection SCD Clinical drug 28 28 View →
725021 24 HR rivastigmine 0.192 MG/HR Transdermal System SCD Clinical drug 28 28 View →
309004 Carbon dioxide 99 % Gas for Inhalation SCD Clinical drug 27 144 View →
861753 Glyburide 5 MG / metformin hydrochloride 500 MG Oral Tablet SCD Clinical drug 27 109 View →
849728 Naproxen sodium 220 MG Oral Tablet [Aleve] SBD Branded drug 27 106 View →
1190572 Atropine sulfate 0.025 MG / diphenoxylate hydrochloride 2.5 MG Oral Tablet SCD Clinical drug 27 83 View →
197737 Glyburide 1.25 MG Oral Tablet SCD Clinical drug 27 82 View →
315107 24 HR glipizide 10 MG Extended Release Oral Tablet SCD Clinical drug 27 63 View →
1151101 Water 983 MG/ML Ophthalmic Irrigation Solution SCD Clinical drug 27 61 View →
205315 Topiramate 25 MG Oral Capsule SCD Clinical drug 27 61 View →
833713 24 HR tramadol hydrochloride 300 MG Extended Release Oral Tablet SCD Clinical drug 27 61 View →
313990 Fluoxetine 10 MG Oral Tablet SCD Clinical drug 27 60 View →
197557 Dapsone 100 MG Oral Tablet SCD Clinical drug 27 59 View →
197558 Dapsone 25 MG Oral Tablet SCD Clinical drug 27 59 View →
1923047 Levothyroxine sodium 0.175 MG Oral Capsule SCD Clinical drug 27 57 View →
1923050 Levothyroxine sodium 0.2 MG Oral Capsule SCD Clinical drug 27 57 View →
905451 Levothyroxine sodium 0.112 MG Oral Capsule SCD Clinical drug 27 57 View →
905455 Levothyroxine sodium 0.137 MG Oral Capsule SCD Clinical drug 27 57 View →
905458 Levothyroxine sodium 0.075 MG Oral Capsule SCD Clinical drug 27 57 View →
905462 Levothyroxine sodium 0.088 MG Oral Capsule SCD Clinical drug 27 57 View →
966404 Levothyroxine sodium 0.1 MG Oral Capsule SCD Clinical drug 27 57 View →
966405 Levothyroxine sodium 0.125 MG Oral Capsule SCD Clinical drug 27 57 View →
966406 Levothyroxine sodium 0.025 MG Oral Capsule SCD Clinical drug 27 57 View →
966407 Levothyroxine sodium 0.05 MG Oral Capsule SCD Clinical drug 27 57 View →
966412 Levothyroxine sodium 0.013 MG Oral Capsule SCD Clinical drug 27 57 View →
966413 Levothyroxine sodium 0.15 MG Oral Capsule SCD Clinical drug 27 57 View →
198911 Zinc oxide 0.2 MG/MG Topical Ointment SCD Clinical drug 27 52 View →
1807888 Modified 24 HR metformin hydrochloride 1000 MG Extended Release Oral Tablet SCD Clinical drug 27 51 View →
314241 Theophylline 450 MG Extended Release Oral Tablet SCD Clinical drug 27 50 View →
861156 12 HR propafenone hydrochloride 225 MG Extended Release Oral Capsule SCD Clinical drug 27 50 View →
861164 12 HR propafenone hydrochloride 325 MG Extended Release Oral Capsule SCD Clinical drug 27 50 View →
861171 12 HR propafenone hydrochloride 425 MG Extended Release Oral Capsule SCD Clinical drug 27 50 View →
283316 Hydrochlorothiazide 12.5 MG / telmisartan 40 MG Oral Tablet SCD Clinical drug 27 45 View →
283317 Hydrochlorothiazide 12.5 MG / telmisartan 80 MG Oral Tablet SCD Clinical drug 27 45 View →
477130 Hydrochlorothiazide 25 MG / telmisartan 80 MG Oral Tablet SCD Clinical drug 27 45 View →
197839 Isosorbide dinitrate 30 MG Oral Tablet SCD Clinical drug 27 44 View →
1359022 Ethinyl estradiol 0.03 MG / norethindrone acetate 1.5 MG Oral Tablet SCD Clinical drug 27 42 View →
311286 Levalbuterol 0.21 MG/ML Inhalation Solution SCD Clinical drug 27 39 View →
311702 Midazolam 5 MG/ML Injectable Solution SCD Clinical drug 27 39 View →
197535 Clozapine 100 MG Oral Tablet SCD Clinical drug 27 38 View →
308760 Bismuth subsalicylate 262 MG Oral Tablet SCD Clinical drug 27 36 View →
809974 20 ML lacosamide 10 MG/ML Injection SCD Clinical drug 27 36 View →
1115329 Dextromethorphan hydrobromide 1.5 MG/ML / doxylamine succinate 0.625 MG/ML Oral Solution SCD Clinical drug 27 30 View →
1116294 1 ML ephedrine sulfate 50 MG/ML Injection SCD Clinical drug 27 30 View →
199211 Cisatracurium 2 MG/ML Injectable Solution SCD Clinical drug 27 30 View →
205104 Salicylic acid 20 MG/ML Medicated Shampoo SCD Clinical drug 27 30 View →
242969 4 ML norepinephrine 1 MG/ML Injection SCD Clinical drug 27 30 View →
830865 12 HR diltiazem hydrochloride 60 MG Extended Release Oral Capsule SCD Clinical drug 27 30 View →
830869 12 HR diltiazem hydrochloride 90 MG Extended Release Oral Capsule SCD Clinical drug 27 30 View →
1660014 1 ML epinephrine 1 MG/ML Injection SCD Clinical drug 27 29 View →
1727569 4 ML bumetanide 0.25 MG/ML Injection SCD Clinical drug 27 29 View →
2604561 Acetaminophen 21.7 MG/ML / dextromethorphan hydrobromide 0.667 MG/ML Oral Solution SCD Clinical drug 27 29 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.