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Thyroid (USP) 15 MG Oral Tablet [Niva Thyroid] — RxCUI 2642818

Name: Thyroid (USP) 15 MG Oral Tablet [Niva Thyroid] (RxCUI 2642818)
Creator: Brian Staiger, PharmD

RxNorm drug concept · Semantic branded drug

RxCUI 2642818 Semantic branded drug · SBD ● Current RxNorm concept 8 FDA products 8 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

RxCUI2642818

Official nameThyroid (USP) 15 MG Oral Tablet [Niva Thyroid]

Concept typeSemantic branded drug (SBD)

RxNorm statusCurrent RxNorm concept

Also known asNiva Thyroid 1/4 grain Oral Tablet; Niva Thyroid 15 MG (1/4 grain) Oral Tablet; Niva Thyroid (levothyroxine sodium 9.5 MCG / liothyronine sodium 2.25 MCG) Oral Tablet

FDA products mapped8

Package NDCs mapped8

Reported Medicaid activity (SDUD)2,235 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 Thyroid: what it is, how it’s used, side effects, and interactions.

📗 Our plain-language guide HelloPharmacist

Great question. Desiccated thyroid — the active ingredient in products like Amerithroid and Thyroid Tablets — is made from dried pig (porcine) thyroid glands. It naturally contains...
What exactly is desiccated thyroid, and is it different from the synthetic thyroid hormone my friend takes?
It does matter a bit. Fasting actually increases the absorption of thyroid hormones, so many people take their tablet first thing in the morning, about 30–60 minutes before eating....
Can I take my thyroid tablet with breakfast, or does it matter?

📖 Read our full Thyroid guide →

🕸️ Concept Web — How Thyroid (USP) 15 MG Oral Tablet [Niva Thyroid] 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 Thyroid (USP) 15 MG Oral Tablet [Niva Thyroid] RxCUI 2642818 Semantic branded drug · SBD

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

Ingredients 1

The active substance itself — no strength, form, or brand attached yet.
- Thyroid (USP) 10572 IN
Brand names 1

The same medicine's trade names. A brand name alone says nothing about strength or form.
- Niva Thyroid 2642811 BN
Dose forms 9

The ingredient poured into a form — tablet, solution, cream — still without one fixed strength.
- Thyroid (USP) Oral Tablet 374122 SCDF
- Thyroid (USP) Oral Product 1162082 SCDG
- Thyroid (USP) Pill 1162083 SCDG
- Thyroid (USP) Oral Tablet [Niva Thyroid] 2642815 SBDF
- Niva Thyroid Oral Product 2642813 SBDG
- Niva Thyroid Pill 2642814 SBDG
- Oral Tablet 317541 DF
- Oral Product 1151131 DFG
- +1 more in this family
Clinical & branded drugs 3

Ingredient + strength + dose form. These are the concepts real FDA products actually carry.
- Thyroid (USP) 15 MG Oral Tablet 314267 SCD
- Thyroid (USP) 15 MG 316823 SCDC
- Thyroid (USP) 15 MG [Niva Thyroid] 2642817 SBDC

Showing up to 8 concepts per family — 13 of 14 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

Thyroid (USP) 15 MG Oral Tablet SCD · 314267
Thyroid (USP) 15 MG SCDC · 316823
Thyroid (USP) Oral Tablet SCDF · 374122
Thyroid (USP) Oral Product SCDG · 1162082
Thyroid (USP) Pill SCDG · 1162083

Brand-Name Concepts

Thyroid (USP) 15 MG [Niva Thyroid] SBDC · 2642817
Thyroid (USP) Oral Tablet [Niva Thyroid] SBDF · 2642815
Niva Thyroid Oral Product SBDG · 2642813
Niva Thyroid Pill SBDG · 2642814
Niva Thyroid BN · 2642811

📦 FDA Products & Package NDCs

8 products · 8 package NDCs

8 package NDCs map to RxCUI 2642818 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
75834-0310-01	100 TABLET in 1 BOTTLE (75834-310-01)	Niva Thyroid	Nivagen Pharmaceuticals, Inc.	2023-07-24
75834-0311-01	100 TABLET in 1 BOTTLE (75834-311-01)	Niva Thyroid	Nivagen Pharmaceuticals, Inc.	2023-07-24
75834-0312-01	100 TABLET in 1 BOTTLE (75834-312-01)	Niva Thyroid	Nivagen Pharmaceuticals, Inc.	2023-07-24
75834-0313-01	100 TABLET in 1 BOTTLE (75834-313-01)	Niva Thyroid	Nivagen Pharmaceuticals, Inc.	2023-07-24
75834-0314-01	100 TABLET in 1 BOTTLE (75834-314-01)	Niva Thyroid	Nivagen Pharmaceuticals, Inc.	2023-07-24
75834-0315-01	100 TABLET in 1 BOTTLE (75834-315-01)	Niva Thyroid	Nivagen Pharmaceuticals, Inc.	2023-07-24
75834-0316-01	100 TABLET in 1 BOTTLE (75834-316-01)	Niva Thyroid	Nivagen Pharmaceuticals, Inc.	2023-07-24
75834-0317-01	100 TABLET in 1 BOTTLE (75834-317-01)	Niva Thyroid	Nivagen Pharmaceuticals, Inc.	2023-07-24

Observed labelers: Nivagen Pharmaceuticals, Inc. (8) — 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.