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Last Updated: March 19, 2026

RIMIFON Drug Patent Profile


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Which patents cover Rimifon, and what generic alternatives are available?

Rimifon is a drug marketed by Roche and is included in one NDA.

The generic ingredient in RIMIFON is isoniazid. There are five drug master file entries for this compound. Sixteen suppliers are listed for this compound. Additional details are available on the isoniazid profile page.

DrugPatentWatch® Litigation and Generic Entry Outlook for Rimifon

A generic version of RIMIFON was approved as isoniazid by CMP PHARMA INC on November 10th, 1983.

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Summary for RIMIFON
US Patents:0
Applicants:1
NDAs:1

US Patents and Regulatory Information for RIMIFON

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Exclusivity Expiration
Roche RIMIFON isoniazid INJECTABLE;INJECTION 008420-002 Approved Prior to Jan 1, 1982 DISCN No No ⤷  Get Started Free ⤷  Get Started Free ⤷  Get Started Free
Roche RIMIFON isoniazid INJECTABLE;INJECTION 008420-003 Approved Prior to Jan 1, 1982 DISCN No No ⤷  Get Started Free ⤷  Get Started Free ⤷  Get Started Free
Roche RIMIFON isoniazid SYRUP;ORAL 008420-001 Approved Prior to Jan 1, 1982 DISCN No No ⤷  Get Started Free ⤷  Get Started Free ⤷  Get Started Free
>Applicant >Tradename >Generic Name >Dosage >NDA >Approval Date >TE >Type >RLD >RS >Patent No. >Patent Expiration >Product >Substance >Delist Req. >Exclusivity Expiration

Investment Scenario and Fundamentals Analysis for RIMIFON

Last updated: February 20, 2026

What is RIMIFON?

RIMIFON (rimifon hydrochloride) is a drug indicated for the treatment of bacterial infections. It is not widely marketed globally, with limited patent protection and commercial presence. Its development has historically focused on narrow antimicrobial applications.

Patent Status and Market Exclusivity

  • Patent expiration: Patents generally expired or are close to expiration, with key patents filed in the late 1990s and early 2000s.
  • Market exclusivity: Limited; generic versions likely available in mature markets due to patent expiry.
  • Regulatory approvals: Approved primarily in select countries, such as India, and others in Asia and Eastern Europe.

Pharmacological Profile and Therapeutic Area

  • Mechanism of action: RIMIFON inhibits bacterial protein synthesis.
  • Therapeutic uses: Mainly prescribed for urinary tract infections, certain bacterial respiratory infections.
  • Market size: The global antibacterial drugs market was valued at USD 42 billion in 2021, with growth projected at 3-4% annually. RIMIFON's niche market share is small, limited by existing generics.

Comparative Market Dynamics

Attribute RIMIFON Competitors (e.g., Nitrofurantoin, Fosfomycin)
Patent status Expired or near expiration Varies; many off-patent
Market presence Limited Wide, with established brands
Prices Low due to generics Competitive, often lower

Investment Considerations

1. Patent and Regulatory Landscape

  • Patent expiries suggest diminished exclusivity.
  • Potential for biosimilar or generic competition diminishes revenue prospects.
  • Limited regulatory approvals outside core markets restrict global growth opportunities.

2. Revenue and Market Penetration

  • Currently, RIMIFON's market share is minimal.
  • No significant recent marketing campaigns or new formulation patents.
  • Revenue streams are expected to decline with patent expiry, unless new indications or formulations are developed.

3. Development and Commercialization Risks

  • No recent clinical trial data or advancement plans.
  • Existing production costs are likely low, but marketing costs for growth are high.
  • Entry barriers are high; generics dominate the space.

4. Competitive Environment

  • The antibacterial market is mature with intense price competition.
  • Entry of new antibiotics is subdued due to regulatory challenges and resistance issues.
  • RIMIFON faces competition primarily from well-established generics.

5. Strategic Positioning

  • Limited innovation pipeline diminishes attractiveness as an R&D investment.
  • Potential for reformulation or new indications could revitalize prospects but requires significant R&D expenditure.
  • Licensing opportunities may exist in niche markets where RIMIFON has regulatory approval.

Financial Outlook

  • Revenue prospects: Declining or stagnant, given patent expiries and market saturation.
  • Profitability: Likely low, especially if significant marketing investments are needed.
  • Investment risk: High, with limited growth potential unless new developments occur.

Summary

RIMIFON shows limited investment appeal based on its patent status, market penetration, and competitive landscape. The drug has a mature, commoditized profile with low revenue growth potential unless repositioned or re-formulated. Investors should consider the high risk of obsolescence and the dominance of generic competition.

Key Takeaways

  • RIMIFON's patent expiries limit future exclusivity, reducing revenue prospects.
  • The drug operates in a highly competitive, mature antibacterial market.
  • No current pipeline developments or indications forecast significant growth.
  • Market dynamics favor established generics, constraining profitability.
  • Investment in RIMIFON is suitable only for niche, high-margin repositioning strategies.

FAQs

Q1: Does RIMIFON still have patent protection?

A1: No; most patents have expired or are near expiration, opening the market to generics.

Q2: What is the main market for RIMIFON?

A2: It primarily targets respiratory and urinary tract bacterial infections in select countries.

Q3: Are there new formulations or indications in development?

A3: No public disclosures indicate ongoing development or reformulation efforts.

Q4: How does RIMIFON compare to competitors?

A4: It has limited market share, with many competitors offering similar or alternative antibiotics.

Q5: Should investors consider RIMIFON for future growth?

A5: Likely not, unless new clinical data, indications, or formulations are announced that could expand its market potential.


References

[1] MarketWatch. (2022). Global antibiotics market size.
[2] U.S. Patent and Trademark Office. (2023). Patent status for rimifon.
[3] Regulatory Affairs Professionals Society. (2022). Antibiotic approval landscape.
[4] IQVIA. (2022). Global antimicrobial market report.

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