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Data / Drug companies / Influenza A M2 Protein Inhibitor

Influenza A M2 Protein Inhibitor drugs: 4 drugs from 39 companies in the FDA NDC directory

Updated November 6, 2026. Source: US Food and Drug Administration, National Drug Code Directory (openFDA).

Influenza A M2 Protein Inhibitor is an FDA established pharmacologic class. The FDA National Drug Code Directory lists 62 products in this class from 39 companies, covering 4 drugs by generic name. The main marketing category is generic drugs (ANDA), and the newest product started marketing on June 17, 2026.

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  • 39Companies
  • 62Products
  • 4Drugs by generic name

Drugs in the Influenza A M2 Protein Inhibitor class

Ranked by number of companies that list the drug.

DrugProducts hereCompanies listing it
Amantadine hydrochloride4432
Amantadine1410
Amantadine hcl31
Rimantadine hydrochloride11

Companies with the most products in this class

CompanyProductsMain dosage formsMain marketing categoryNewest product started
Bryant Ranch Prepack6capsuleGeneric drugs (ANDA)May 21, 2020
Chartwell RX, LLC3solution; capsuleGeneric drugs (ANDA)June 12, 2017
Coupler LLC3tablet; capsuleGeneric drugs (ANDA)March 13, 2025
Direct_Rx3capsule; tabletGeneric drugs (ANDA)January 15, 2026
Adamas Pharma, LLC2capsule, coated pelletsNew drug applications (NDA)August 24, 2017
Alembic Pharmaceuticals Inc.2tablet; capsuleGeneric drugs (ANDA)October 20, 2020
Alembic Pharmaceuticals Limited2capsule; tabletGeneric drugs (ANDA)October 20, 2020
American Health Packaging2solution; capsuleGeneric drugs (ANDA)February 26, 2024
AvPAK2solution; capsule, liquid filledGeneric drugs (ANDA)January 19, 2026
Marlex Pharmaceuticals, Inc.2capsule, gelatin coated; tabletGeneric drugs (ANDA)March 1, 2020
NCS HealthCare of Ky, LLC DBA Vangard Labs2tablet; capsuleGeneric drugs (ANDA)October 20, 2020
Proficient Rx LP2capsuleGeneric drugs (ANDA)August 4, 2016
Proficient Rx LP2capsule; tabletGeneric drugs (ANDA)October 20, 2020
Strides Pharma Inc.2capsule; tabletGeneric drugs (ANDA)August 4, 2017
Supernus Pharmaceuticals, Inc.2capsule, coated pelletsNew drug applications (NDA)August 24, 2017
Upsher-Smith Laboratories, LLC2tablet; capsule, gelatin coatedGeneric drugs (ANDA)December 15, 2011
A-S Medication Solutions1capsuleGeneric drugs (ANDA)February 18, 1987
Advagen Pharma Ltd1capsuleGeneric drugs (ANDA)May 21, 2020
Amneal Pharmaceuticals of New York LLC1tablet, film coatedGeneric drugs (ANDA)November 16, 2021
Atlantic Biologicals Corp.1solutionGeneric drugs (ANDA)July 17, 1995
AvKARE1capsuleGeneric drugs (ANDA)June 17, 2026
AvKARE1capsule, liquid filledGeneric drugs (ANDA)August 7, 2013
Bajaj Medical, LLC1solutionGeneric drugs (ANDA)July 31, 2025
Bionpharma Inc.1capsule, liquid filledGeneric drugs (ANDA)August 15, 2016
Bryant Ranch Prepack1capsuleGeneric drugs (ANDA)June 12, 2017
Cardinal Health 107, LLC1solutionGeneric drugs (ANDA)July 17, 1995
Chartwell Governmental & Specialty RX, LLC.1solutionGeneric drugs (ANDA)June 28, 1993
Epic Pharma, LLC1capsuleGeneric drugs (ANDA)June 17, 2021
Heritage Pharmaceuticals Inc. D/B/A Avet Pharmaceuticals Inc.1capsuleGeneric drugs (ANDA)June 12, 2017
Major Pharmaceuticals1capsuleGeneric drugs (ANDA)June 12, 2017
Pai Holdings, LLC DBA Pai Pharma1solutionGeneric drugs (ANDA)July 17, 1995
Patrin Pharma, Inc.1solutionGeneric drugs (ANDA)August 11, 2023
Rising Pharma Holdings, Inc.1capsuleGeneric drugs (ANDA)September 5, 2022
St. Mary's Medical Park Pharmacy1capsuleGeneric drugs (ANDA)May 21, 2020
Strides Pharma Science Limited1capsule, liquid filledGeneric drugs (ANDA)December 1, 2022
Xttrium Laboratories, Inc.1solutionGeneric drugs (ANDA)November 5, 2024
Zhejiang Jutai Pharamceutical Co., Ltd1tabletGeneric drugs (ANDA)September 26, 2024
Zydus Lifesciences Limited1capsuleGeneric drugs (ANDA)August 4, 2016
Zydus Pharmaceuticals USA Inc.1capsuleGeneric drugs (ANDA)August 4, 2016

Dosage forms

Dosage formProductsShare
Capsule2946.8%
Solution1117.7%
Tablet1117.7%
Capsule, coated pellets46.5%
Capsule, liquid filled46.5%
Capsule, gelatin coated23.2%
Tablet, film coated11.6%

CC0 1.0 public domain dedication (openFDA). Counts are products in the FDA National Drug Code Directory on November 6, 2026: 138,262 products in commercial distribution, meaning without a marketing end date in the past. A company is a labeler code; one company can hold several codes, and the directory carries no address. Inclusion in the directory is not FDA approval, and the marketing category says under which kind of application or rule a product is sold. This page uses openFDA data and is not endorsed or certified by FDA. Free to reuse with credit to SpecStream under CC BY 4.0. Spot a wrong value? Write to [email protected] with the link to this page.