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Phenytoin sodium 300 MG Extended Release Oral Capsule — RxCUI 855873

Name: Phenytoin sodium 300 MG Extended Release Oral Capsule (RxCUI 855873)
Creator: Brian Staiger, PharmD

RxNorm drug concept · Semantic clinical drug

RxCUI 855873 Semantic clinical drug · SCD ● Current RxNorm concept 4 FDA products 12 package NDCs Snapshot Jul 14, 2026

This page is curated, coded, and maintained by Dr. Brian Staiger, PharmD

Compiled from public NLM RxNorm and FDA (openFDA NDC directory) data sources. Editorial policy

What you’re looking at: the standardized identity of one medicine, as the U.S. drug-data system sees it. Below — every FDA-listed product, package code, price benchmark, and billing code that maps to it.

🗂️ Key Facts

RxCUI855873

Official namePhenytoin sodium 300 MG Extended Release Oral Capsule

Concept typeSemantic clinical drug (SCD)

RxNorm statusCurrent RxNorm concept

Also known asDPH sodium 300 MG Extended Release Oral Capsule

FDA products mapped4

Package NDCs mapped12

Reported Medicaid activity (SDUD)3,611 prescriptions · 19 state & territory Medicaid programs · latest period Q4 2025

RxNorm release07/06/2026

Snapshot dataJul 14, 2026

📖 Skip the Codes — Read It in Plain English.

Our pharmacist-built guide to Phenytoin Injection: what it is, how it’s used, side effects, and interactions.

📗 Our plain-language guide HelloPharmacist

The injection form is used when you need fast seizure control or when swallowing a pill isn't possible right now — for example, during a seizure emergency or around the time of bra...
Why am I getting phenytoin as an injection instead of a pill?
The infusion has to go in slowly — that's actually one of the most important things about this medicine. Going too fast can cause your blood pressure to drop dangerously or trigger...
Is it safe to give this drug quickly through the IV?

📖 Read our full Phenytoin Injection guide →

🕸️ Concept Web — How Phenytoin sodium 300 MG Extended Release Oral Ca... Connects

One RxCUI never lives alone. Follow the path from the raw ingredient down to the exact strength-and-form concepts FDA products carry — every stop is a real RxNorm concept with its own identifier. Hover or focus any chip for what it means.

This page's concept Phenytoin sodium 300 MG Extended Release Oral Capsule RxCUI 855873 Semantic clinical drug · SCD

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

Ingredients 2

The active substance itself — no strength, form, or brand attached yet.
- Phenytoin 8183 IN
- Phenytoin sodium 71227 PIN
Brand names 1

The same medicine's trade names. A brand name alone says nothing about strength or form.
- Phenytek 352891 BN
Dose forms 13

The ingredient poured into a form — tablet, solution, cream — still without one fixed strength.
- Phenytoin Extended Release Oral Capsule 373435 SCDF
- Phenytoin sodium Extended Release Oral Capsule 2647611 SCDFP
- Phenytoin Oral Product 1158167 SCDG
- Phenytoin Pill 1158169 SCDG
- Phenytoin sodium Oral Product 2662720 SCDGP
- Phenytoin sodium Pill 2663508 SCDGP
- Phenytoin Extended Release Oral Capsule [Phenytek] 366944 SBDF
- Phenytoin sodium Extended Release Oral Capsule [Phenytek] 2655861 SBDFP
- +5 more in this family
Clinical & branded drugs 3

Ingredient + strength + dose form. These are the concepts real FDA products actually carry.
- Phenytoin sodium 300 MG 855872 SCDC
- Phenytoin sodium 300 MG Extended Release Oral Capsule [Phenytek] 855875 SBD
- Phenytoin sodium 300 MG [Phenytek] 855874 SBDC

Showing up to 8 concepts per family — 14 of 19 stored related concepts drawn.

These are official RxNorm vocabulary relationships — how concepts name and organize the same medicine. They do not establish therapeutic equivalence or substitutability: two concepts appearing in one web is never a statement that products can be swapped.

🔀 Generic ⇄ Brand Crosswalk

The same medicine has an unbranded (generic) identity and one or more brand-name identities — each with its own RxCUI. This is a naming relationship in RxNorm, not a statement that any two products are substitutable.

Generic (Clinical) Concepts

Phenytoin sodium 300 MG SCDC · 855872
Phenytoin Extended Release Oral Capsule SCDF · 373435
Phenytoin sodium Extended Release Oral Capsule SCDFP · 2647611
Phenytoin Oral Product SCDG · 1158167
Phenytoin Pill SCDG · 1158169
Phenytoin sodium Oral Product SCDGP · 2662720
Phenytoin sodium Pill SCDGP · 2663508

Brand-Name Concepts

Phenytoin sodium 300 MG Extended Release Oral Capsule [Phenytek] SBD · 855875
Phenytoin sodium 300 MG [Phenytek] SBDC · 855874
Phenytoin Extended Release Oral Capsule [Phenytek] SBDF · 366944
Phenytoin sodium Extended Release Oral Capsule [Phenytek] SBDFP · 2655861
Phenytek Oral Product SBDG · 1180000
Phenytek Pill SBDG · 1180001
Phenytek BN · 352891

📦 FDA Products & Package NDCs

4 products · 12 package NDCs

12 package NDCs map to RxCUI 855873 in the current snapshot — up to 50 per page. Each linked NDC opens its full package page.

Package NDC	Package	Brand / generic name	Labeler	Marketing start
00378-2670-01	100 CAPSULE, EXTENDED RELEASE in 1 BOTTLE (0378-2670-01)	Phenytek	Mylan Pharmaceuticals Inc.	2001-12-10
00378-2670-93	30 CAPSULE, EXTENDED RELEASE in 1 BOTTLE (0378-2670-93)	Phenytek	Mylan Pharmaceuticals Inc.	2001-12-10
00378-3750-01	100 CAPSULE, EXTENDED RELEASE in 1 BOTTLE (0378-3750-01)	Phenytek	Mylan Pharmaceuticals Inc.	2001-12-10
00378-3750-93	30 CAPSULE, EXTENDED RELEASE in 1 BOTTLE (0378-3750-93)	Phenytek	Mylan Pharmaceuticals Inc.	2001-12-10
62756-0299-08	100 CAPSULE, EXTENDED RELEASE in 1 BOTTLE (62756-299-08)	phenytoin sodium	Sun Pharmaceutical Industries, Inc.	2008-06-30
62756-0299-13	500 CAPSULE, EXTENDED RELEASE in 1 BOTTLE (62756-299-13)	phenytoin sodium	Sun Pharmaceutical Industries, Inc.	2008-06-30
62756-0299-83	30 CAPSULE, EXTENDED RELEASE in 1 BOTTLE (62756-299-83)	phenytoin sodium	Sun Pharmaceutical Industries, Inc.	2008-06-30
62756-0299-88	100 CAPSULE, EXTENDED RELEASE in 1 BOTTLE (62756-299-88)	phenytoin sodium	Sun Pharmaceutical Industries, Inc.	2008-06-30
62756-0432-08	100 CAPSULE, EXTENDED RELEASE in 1 BOTTLE (62756-432-08)	phenytoin sodium	Sun Pharmaceutical Industries, Inc.	2008-06-30
62756-0432-13	500 CAPSULE, EXTENDED RELEASE in 1 BOTTLE (62756-432-13)	phenytoin sodium	Sun Pharmaceutical Industries, Inc.	2008-06-30
62756-0432-83	30 CAPSULE, EXTENDED RELEASE in 1 BOTTLE (62756-432-83)	phenytoin sodium	Sun Pharmaceutical Industries, Inc.	2008-06-30
62756-0432-88	100 CAPSULE, EXTENDED RELEASE in 1 BOTTLE (62756-432-88)	phenytoin sodium	Sun Pharmaceutical Industries, Inc.	2008-06-30

Observed labelers: Sun Pharmaceutical Industries, Inc. (8) · Mylan Pharmaceuticals Inc. (4) — this is the FDA-listed mapping footprint, not sales, inventory, availability, or market share.

🗃️ Sources & Limits

Atlas generation902fddb9-e9c1-4004-bf4c-dba4d51037c7

openFDA export observedJul 14, 2026

RxNorm release07/06/2026

Methodology2026-07-full-catalog-v1

A shared RxCUI does not prove interchangeability. Products mapped to the same concept are not thereby equivalent or substitutable — equivalence is a separate, product-level determination.
Listing here does not establish approval or coverage. Appearing in this snapshot is a data observation, not an FDA approval status or a payer coverage decision.
Missing data never means zero. A silent dataset (no price, no billing code, no utilization) means no observation — not that the real-world value is zero.
Counts describe the mapping footprint. Product, package, and labeler counts are the FDA-listed mapping footprint in this snapshot — not sales, inventory, availability, or market share.

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.

Machine-readable JSON

Reference information about drug-concept identifiers and public regulatory data — not medical advice. Talk to your pharmacist or prescriber about your own medication.