Last Updated: June 9, 2026

Salix Pharms Company Profile


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Summary for Salix Pharms
International Patents:199
US Patents:27
Tradenames:9
Ingredients:8
NDAs:9

Drugs and US Patents for Salix Pharms

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Exclusivity Expiration
Salix Pharms XIFAXAN rifaximin TABLET;ORAL 021361-002 Mar 24, 2010 AB RX Yes Yes 8,969,398 ⤷  Start Trial ⤷  Start Trial
Salix Pharms XIFAXAN rifaximin TABLET;ORAL 021361-002 Mar 24, 2010 AB RX Yes Yes 9,271,968 ⤷  Start Trial Y ⤷  Start Trial
Salix Pharms XIFAXAN rifaximin TABLET;ORAL 021361-002 Mar 24, 2010 AB RX Yes Yes 8,829,017 ⤷  Start Trial ⤷  Start Trial
Salix Pharms RELISTOR methylnaltrexone bromide SOLUTION;SUBCUTANEOUS 021964-002 Sep 27, 2010 RX Yes Yes 9,180,125 ⤷  Start Trial Y ⤷  Start Trial
Salix Pharms METOZOLV ODT metoclopramide hydrochloride TABLET, ORALLY DISINTEGRATING;ORAL 022246-002 Sep 4, 2009 DISCN Yes No ⤷  Start Trial ⤷  Start Trial
Salix Pharms RELISTOR methylnaltrexone bromide SOLUTION;SUBCUTANEOUS 021964-001 Apr 24, 2008 RX Yes Yes 9,180,125 ⤷  Start Trial Y ⤷  Start Trial
Salix Pharms XIFAXAN rifaximin TABLET;ORAL 021361-002 Mar 24, 2010 AB RX Yes Yes 9,421,195 ⤷  Start Trial ⤷  Start Trial
>Applicant >Tradename >Generic Name >Dosage >NDA >Approval Date >TE >Type >RLD >RS >Patent No. >Patent Expiration >Product >Substance >Delist Req. >Exclusivity Expiration

Expired US Patents for Salix Pharms

Applicant Tradename Generic Name Dosage NDA Approval Date Patent No. Patent Expiration
Salix Pharms METOZOLV ODT metoclopramide hydrochloride TABLET, ORALLY DISINTEGRATING;ORAL 022246-001 Sep 4, 2009 6,413,549 ⤷  Start Trial
Salix Pharms XIFAXAN rifaximin TABLET;ORAL 021361-002 Mar 24, 2010 8,835,452 ⤷  Start Trial
Salix Pharms RELISTOR methylnaltrexone bromide SOLUTION;SUBCUTANEOUS 021964-003 Sep 27, 2010 10,376,584 ⤷  Start Trial
Salix Pharms XIFAXAN rifaximin TABLET;ORAL 021361-001 May 25, 2004 8,158,781 ⤷  Start Trial
Salix Pharms RELISTOR methylnaltrexone bromide SOLUTION;SUBCUTANEOUS 021964-003 Sep 27, 2010 8,552,025 ⤷  Start Trial
Salix Pharms VISICOL sodium phosphate, dibasic, anhydrous; sodium phosphate, monobasic, monohydrate TABLET;ORAL 021097-001 Sep 21, 2000 5,616,346 ⤷  Start Trial
Salix Pharms XIFAXAN rifaximin TABLET;ORAL 021361-001 May 25, 2004 8,835,452 ⤷  Start Trial
>Applicant >Tradename >Generic Name >Dosage >NDA >Approval Date >Patent No. >Patent Expiration
Paragraph IV (Patent) Challenges for SALIX PHARMS drugs
Drugname Dosage Strength Tradename Submissiondate
➤ Subscribe For Oral Solution 100 g, 7.5 g, 2.691 g, 1.015 g, 5.9 g and 4.7 g per pouch ➤ Subscribe 2007-11-27
➤ Subscribe Injection 8 mg/0.4 mL ➤ Subscribe 2015-09-08
➤ Subscribe Orally Disintegrating Tablets 5 mg and 10 mg ➤ Subscribe 2010-08-24
➤ Subscribe Tablets 550 mg ➤ Subscribe 2015-12-18
➤ Subscribe Injection 12 mg/0.6 mL ➤ Subscribe 2015-07-22
➤ Subscribe Tablets 150 mg ➤ Subscribe 2016-09-06
➤ Subscribe Tablets 1.102 g and 0.398 g ➤ Subscribe 2008-04-09
➤ Subscribe Tablets 200 mg ➤ Subscribe 2019-01-28

International Patents for Salix Pharms Drugs

Country Patent Number Estimated Expiration
Mexico 2012002895 ⤷  Start Trial
South Korea 20170036116 ⤷  Start Trial
Russian Federation 2571268 ⤷  Start Trial
World Intellectual Property Organization (WIPO) 2011153327 ⤷  Start Trial
Russian Federation 2571268 ⤷  Start Trial
Japan 2015129144 ⤷  Start Trial
European Patent Office 2308476 ⤷  Start Trial
>Country >Patent Number >Estimated Expiration

Supplementary Protection Certificates for Salix Pharms Drugs

Patent Number Supplementary Protection Certificate SPC Country SPC Expiration SPC Description
1912999 2014/058 Ireland ⤷  Start Trial PRODUCT NAME: SIMEPREVIR, OR A SALT THEREOF, INCLUDING SIMEPREVIR SODIUM; REGISTRATION NO/DATE: EU/1/14/924/001-002 20140516
0733366 SPC/GB98/031 United Kingdom ⤷  Start Trial PRODUCT NAME: 2-BUTYL-4-CHLORO-1-((2'-(1H-TETRAZOL-5-YL) BIPHENYL-4-YL)-METHYL)-5-(HYDROXYMETHYL)IMIDAZOLE (LOSARTAN),OPTIONALLY IN THE FORM OF A PHARMACEUTICALLY ACCEPTABLE SALT, IN PARTICULAR A POTASSIUM SALT( LOSARTAN POTASSIUM) AND HYDROCHLOROTHIAZIDE,; REGISTERED: FR 338520.7 19950215; FR 558453.7 19950215; UK 00025/0338 19960412
1874117 SPC/GB14/041 United Kingdom ⤷  Start Trial PRODUCT NAME: DOLUTEGRAVIR OR A PHARMACEUTICALLY ACCEPTABLE SALT OR SOLVATE THEREOF, INCLUDING DOLUTEGRAVIR SODIUM; REGISTERED: UK EU/1/13/892/001-006 20140121
2203431 CR 2015 00014 Denmark ⤷  Start Trial PRODUCT NAME: DASABUVIR OR A SALT THEREOF, INCLUDING DASABUVIR SODIUM MONOHYDRATE; REG. NO/DATE: EU/1/14/983 20150119
0290047 SPC/GB97/078 United Kingdom ⤷  Start Trial PRODUCT NAME: MANGAFODIPIR AND PHARMACEUTICALLY ACCEPTABLE SALTS THEREOF, IN PARTICULAR MANGAFODIPIR TRISODIUM; REGISTERED: UK EU/1/97/040/001 19970522; UK EU/1/97/040/002 19970522
1507558 2012/018 Ireland ⤷  Start Trial PRODUCT NAME: ALISKIREN OR A PHARMACEUTICALLY ACCEPTABLE SALT THEREOF, AMLODIPINE OR A PHARMACEUTICALLY ACCEPTABLE SALT THEREOF AND HYDROCHLOROTHIAZIDE OR A PHARMACEUTICALLY ACCEPTABLE SALT THEREOF.; NAT REGISTRATION NO/DATE: EU/1/11/730/001-060 20111122; FIRST REGISTRATION NO/DATE: SWITZERLAND 6167801-6167805 20110705
2822954 SPC/GB18/031 United Kingdom ⤷  Start Trial PRODUCT NAME: BICTEGRAVIR OR A PHARMACEUTICALLY ACCEPTABLE SALT THEREOF, IN PARTICULAR BICTEGRAVIR SODIUM.; REGISTERED: UK EU/1/18/1289/001(NI) 20180625; UK EU/1/18/1289/002(NI) 20180625; UK PLGB 11972/0008 20180625
>Patent Number >Supplementary Protection Certificate >SPC Country >SPC Expiration >SPC Description
Similar Applicant Names
Applicants may be listed under multiple names.
Here is a list of applicants with similar names.

Salix Pharmaceuticals: Market Position, Strengths & Strategic Insights

Last updated: February 19, 2026

What is Salix Pharmaceuticals’ current market position?

Salix Pharmaceuticals operates primarily in the gastrointestinal (GI) disorder segment, specializing in prescription drugs for constipation, diarrhea, and other gut-related conditions. In 2022, Salix generated approximately $1.7 billion in net revenue, making it a leading player in the GI therapeutics market, which was valued at $17.5 billion globally in 2022 (Grand View Research, 2022). The company holds about 8-10% market share in the prescription GI drugs segment.

Salix’s growth stems from its focus on niche, high-margin products like Xifaxan (rifaximin), a treatment for irritable bowel syndrome with diarrhea (IBS-D) and traveler’s diarrhea. Xifaxan accounts for about 70% of total revenue. While dominated by several large pharmaceutical companies, its specialty positioning allows Salix to sustain a competitive edge in its core markets.

How does Salix’s portfolio compare to competitors?

Company Key Products Market Focus Estimated Revenue (2022) Market Share in GI Segment
Salix Pharmaceuticals Xifaxan, Relistor, Apriso Gastrointestinal, IBS, hepatic encephalopathy $1.7 billion 8-10%
Pfizer (merged with BioDelivery) Viberzi, Zenvia Functional bowel disorders, diarrhea $850 million 4-6%
Allergan (part of AbbVie) Linzess (under its broader portfolio) Chronic constipation, IBS-C $2.3 billion 13%
Ferring Pharmaceuticals Dimpax, Ferring GI products Gastroenterology $900 million 5-7%

Salix’s key differentiator remains the efficacy and oral administration of Xifaxan, alongside its suitability for specific GI conditions. Its reliance on fewer blockbuster products enhances its revenue stability but also exposes it to risks if patents face challenges.

What are Salix’s core strengths?

  1. Product Specialization: Focus on GI disorders yields deep expertise, enabling targeted R&D and clinical development.
  2. Xifaxan Portfolio: The dominant product, with multiple indications, supports sustained revenue streams and global licensing deals.
  3. Market Penetration: Strong presence in the U.S. with coast-to-coast distribution channels and partnerships with major healthcare providers.
  4. Regulatory Approvals: Multiple FDA approvals for Xifaxan and other drugs allow diverse indications, reducing vulnerability to market shifts.

What strategic opportunities exist for Salix?

  • Expansion of Indications: Developing new uses for Xifaxan, such as hepatic encephalopathy, to broaden revenue sources.
  • International Growth: Increasing market footprint in Europe and Asia, where GI disorder treatments are underpenetrated.
  • Biosimilars and Generics: Exploiting patent expirations for Xifaxan if applicable, or introducing biosimilar options.
  • Partnerships & Licensing: Engaging with biotech firms to co-develop new therapies specifically for niche GI sub-indications.

What threats could influence Salix’s market position?

  • Patent Challenges: The Xifaxan patent expired in 2029, and generic competition could erode margins.
  • Market Consolidation: Larger pharmaceutical companies may acquire or outcompete Salix via increased R&D activity.
  • Regulatory Hurdles: Lengthy approval processes for new indications or formulations can slow growth.
  • Pricing Pressures: Increasing scrutiny on drug prices in the U.S. can compress profit margins.

How are competitors positioning themselves?

  • AbbVie’s Linzess: With sales of $2.3 billion in 2022, AbbVie's strategy emphasizes broad indications and enhanced formulations.
  • Pfizer’s Viberzi: Focuses on functional GI disorders but faces stiff competition from established products and emerging therapies.
  • Ferring’s Biotech Initiatives: Investing in novel biologics for GI indications, aiming to complement traditional small-molecule therapies.

Conclusion

Salix maintains a strong position within the GI market through its flagship product, Xifaxan, and focused therapeutic area. Its predominantly niche focus presents opportunities for growth via expansion of indications and international markets but also exposes it to patent expiration risks and industry consolidation. Strategic partnerships and innovation remain essential for maintaining its competitive edge.

Key Takeaways

  • Salix's 2022 revenue centered on Xifaxan, which dominates its portfolio.
  • Competition includes AbbVie, Pfizer, and Ferring, with varying market shares.
  • Growth opportunities include expanding indications, geographic expansion, and biosimulants.
  • Patent expiration in 2029 poses a significant risk for revenue erosion.
  • Strategic alliances and pipeline diversification are necessary to sustain long-term competitiveness.

FAQs

1. What is the primary revenue driver for Salix Pharmaceuticals?
Xifaxan is the main source of revenue, accounting for approximately 70% of total sales.

2. How does patent expiration impact Salix’s future sales?
The patent for Xifaxan expires in 2029, potentially opening the market to generic competitors and reducing margins.

3. Which markets are most promising for Salix’s international expansion?
Europe and Asia exhibit growing demand for GI therapeutics, with unmet needs in chronic GI disorder management.

4. What are the major competitors to Salix in the GI space?
AbbVie (Linzess), Pfizer (Viberzi), and Ferring Pharmaceuticals (biologics) present the strongest competition.

5. How can Salix sustain its market position amid industry consolidation?
Through innovation, expanding indications, strategic licensing, and expanding international presence.


References

  1. Grand View Research. (2022). Gastrointestinal therapeutics market size, share & trends analysis. Retrieved from https://www.grandviewresearch.com/industry-analysis/gastrointestinal-therapeutics-market
  2. Salix Pharmaceuticals. (2022). Annual report.
  3. MarketWatch. (2022). Top GI drug manufacturers market share analysis. Retrieved from https://www.marketwatch.com/

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