Last Updated: May 2, 2026

METRONIDAZOLE Drug Patent Profile


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When do Metronidazole patents expire, and what generic alternatives are available?

Metronidazole is a drug marketed by Able, Alembic, Chartwell Rx, Aurobindo Pharma Ltd, Cosette, Fougera Pharms, Zydus Lifesciences, Encube, Taro, Glenmark Pharms Ltd, Padagis Israel, Sciegen Pharms, Solaris Pharma Corp, Abbott, Abraxis Pharm, Hikma, Intl Medication, Watson Labs, Alembic Pharms Ltd, Cadila, Cadila Pharms Ltd, Chartwell Molecules, Flamingo Pharms, Fosun Pharma, Halsey, Innogenix, Ivax Sub Teva Pharms, LNK, Lupin Ltd, Mutual Pharm, Novitium Pharma, Pliva, Somerset Theraps Llc, Strides Pharma, Superpharm, Teva Pharms Usa, Unichem, Watson Labs Inc, Amneal, Baxter Hlthcare Corp, Gland, Hospira, Inforlife, and Rising. and is included in seventy-two NDAs.

The generic ingredient in METRONIDAZOLE is metronidazole hydrochloride. There are eighteen drug master file entries for this compound. Additional details are available on the metronidazole hydrochloride profile page.

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Summary for METRONIDAZOLE
Paragraph IV (Patent) Challenges for METRONIDAZOLE
Tradename Dosage Ingredient Strength NDA ANDAs Submitted Submissiondate
LIKMEZ Oral Suspension metronidazole 500 mg/5 mL 216755 1 2025-11-13
NUVESSA Vaginal Gel metronidazole 1.30% 205223 1 2022-03-30
METROGEL Topical Gel metronidazole 1% 021789 1 2008-10-21
METROGEL-VAGINAL Vaginal Gel metronidazole 0.75% 020208 1 2004-09-02

US Patents and Regulatory Information for METRONIDAZOLE

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Exclusivity Expiration
Strides Pharma METRONIDAZOLE metronidazole TABLET;ORAL 070040-001 Jan 29, 1985 DISCN No No ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
Aurobindo Pharma Ltd METRONIDAZOLE metronidazole TABLET;ORAL 203974-001 May 29, 2015 AB RX No No ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
Fougera Pharms METRONIDAZOLE metronidazole LOTION;TOPICAL 077197-001 May 24, 2006 AB RX No No ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
Amneal METRONIDAZOLE IN PLASTIC CONTAINER metronidazole INJECTABLE;INJECTION 217665-001 May 24, 2023 AP RX No No ⤷  Start Trial ⤷  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

Metronidazole Investment Scenario and Fundamentals Analysis

Last updated: April 26, 2026

What is metronidazole and where does it sit in the market?

Metronidazole is a nitroimidazole antimicrobial used across infectious disease indications where anaerobic organisms and certain protozoa are implicated. It is marketed as a generic globally and has long patent expiry history in key jurisdictions. The investment profile is therefore driven less by near-term patent expansion and more by (1) contract and tender cycles, (2) supply and manufacturing resilience, (3) geographic coverage and reimbursement, and (4) incremental formulation and delivery improvements that sustain shelf access.

Product form reality check Metronidazole is widely sold in multiple dosage forms, typically as tablets/capsules, oral suspension in pediatric use, and parenteral formulations for hospital settings. The breadth of forms supports recurring procurement patterns in hospital formularies and national treatment guidelines.

How do demand drivers map to fundamentals?

Demand is anchored by stable clinical use in:

  • Anaerobic bacterial infections (intra-abdominal, dental/odontogenic, gynecologic, skin and soft tissue infections depending on regimen and guideline)
  • Gynecologic infections (notably bacterial vaginosis)
  • Protozoal infections (e.g., trichomoniasis, amoebiasis, giardiasis in many guideline frameworks)
  • Hospital and surgical settings where anaerobic coverage is part of peri-procedural antimicrobial strategies (local practice varies)

Core fundamentals implications

  • Demand stability: Clinical repositioning is limited because the active is established. Volume demand tends to be steadier than for newer branded antibiotics.
  • Pricing pressure: Generic competition is structurally price-compressing, especially where multiple manufacturers are established and reimbursement is reference-priced.
  • Margin structure: Margins depend on manufacturing cost position, scale, regulatory status, and supply chain reliability rather than on clinical differentiation.

What are the key commercial forces shaping pricing and sales?

Generic competition and tender dynamics

Metronidazole competes in a generic marketplace where:

  • Contract awards in hospitals can shift quickly when tenders re-bid.
  • Price volatility often follows supply disruptions and raw material constraints.
  • Buyers prioritize consistent supply, stability of concentration, and compliance track record.

Regulatory and quality constraints

Because it is generic, buyers tighten scrutiny around:

  • GMP compliance and inspection outcomes
  • Data integrity and batch release performance
  • Stability and shelf life for each presentation
  • Bioequivalence outcomes for reformulated or locally manufactured versions

Supply chain and API concentration risk

Metronidazole API supply is global, but bottlenecks can still emerge from:

  • plant outages,
  • compliance actions,
  • energy or logistics shocks affecting bulk manufacture and sterilization/packaging.

Investment implication: A position in the winners is more about execution and capacity than about marketing.

Is there a patent or exclusivity overhang that changes the investment case?

Metronidazole is an old molecule. In most major markets, original compositions and uses have long since expired. The practical investment question is not “does metronidazole have patent runway,” but:

  • whether any later-life formulation or local manufacturing approvals are protecting a specific marketed SKU, and
  • whether the company has defensible regulatory status (ANDAs, dossiers, line ownership, and inspection outcomes).

What that means for valuation

  • Expect range-bound revenues with high sensitivity to procurement cycles.
  • Expect low catalyst frequency relative to specialty pharma, unless the portfolio includes distinct line-ups (e.g., co-formulations, unique manufacturing efficiencies, or less-served geographies).

What is the competitive landscape in metronidazole?

The market is dominated by:

  • large global generic manufacturers,
  • regional generics with established tender relationships,
  • and local incumbents with pack-level regulatory approvals.

Competitive differentiation that still matters Even in commodity-like markets, differentiation can come from:

  • lower unit cost and dependable bulk availability,
  • higher fill-finish uptime,
  • faster tender turnaround,
  • and consistent supply to wholesalers.

Where do investors typically see upside in generics like metronidazole?

Upside rarely comes from science breakthroughs. It tends to come from operational and portfolio structure:

  • Cost leadership at scale: lower COGS from API procurement leverage, yield improvements, and efficient packaging.
  • Regulatory and supply reliability: fewer rejected batches, fewer recalls, better audit outcomes, and higher contract retention.
  • Geographic expansion: penetration into markets with fewer qualified suppliers or where procurement is less crowded.
  • Product mix: higher share of hospital/parenteral or higher-value presentations where tender dynamics differ.

What downside risks dominate?

Key risks are structural and execution-driven:

  • Price compression: new entrants lower tender prices.
  • Supply disruption: inability to meet QMS and batch release requirements causes lost contracts.
  • Regulatory enforcement: facility observations can delay launches and renewals.
  • Working capital intensity: procurement and inventory cycles in some geographies can raise cash needs.

Risk translation into investment metrics

  • Gross margin sensitivity to spot pricing and tender outcomes
  • Revenue volatility around contract re-awards
  • Cash conversion cycle dependence on inventory and receivables terms

What do historical and regulatory sources indicate about use and coverage?

Metronidazole is recognized widely for its antimicrobial activity and clinical use in anaerobic infections and specific protozoal diseases. Clinical references and drug information databases document these indications and standard dosing frameworks across many national formularies and label references. (See sources cited below.)

Investment scenario: how to underwrite metronidazole

An investment thesis for metronidazole should be framed as a generic execution bet. The scenario model should focus on SKU-level economics, not clinical differentiation.

1) Revenue engine: tender-linked stability

Assume revenue is driven by:

  • hospital and pharmacy channel tender cycles,
  • re-order frequency based on guideline adherence and formulary status,
  • and the company’s share of qualified bidders.

2) Cost engine: API and manufacturing

Model:

  • API procurement costs and exchange-rate exposure where relevant,
  • manufacturing yield and batch release rates,
  • packaging and logistics per presentation,
  • and compliance costs (quality systems, batch documentation, validation).

3) Margin engine: portfolio mix

Margins improve when:

  • the firm holds share in the presentations with higher procurement value (often hospital-grade forms),
  • the firm’s cost base undercuts competitors,
  • and the firm has fewer rejected batches.

4) Cash engine: working capital and contracting terms

Cash conversion depends on:

  • payment terms from wholesalers and institutions,
  • inventory build against contract timing,
  • and any reserve buffers for compliance shelf-life management.

What fundamental indicators should be monitored?

Use a KPI stack that maps directly to procurement and quality outcomes.

Commercial KPIs

  • Contract win rate by geography and tender cycle
  • Reorder frequency and average order size for core SKUs
  • Average realized selling price (RSP) vs reference benchmarks
  • Customer concentration in top tenders

Operational KPIs

  • Batch release timelines and rejection rates
  • On-time delivery rate to hospital and wholesaler accounts
  • Inspection outcomes and CAPA closure speed
  • API supply continuity (lead times and dual-source status)

Financial KPIs

  • Gross margin by presentation and region
  • Inventory turns and days sales outstanding
  • Forecast accuracy around tender cycles
  • Capex intensity and utilization rates for relevant lines

Key scenario outcomes

Base case

  • Stable volumes across established geographies
  • Incremental share shifts during tender cycles
  • Margin discipline maintained through cost reductions and supply continuity

Upside case

  • Cost position improves faster than competitors (yield, API procurement, pack size economics)
  • Contract re-awards extend due to performance history
  • Expansion into less crowded markets with robust tendering

Downside case

  • Sustained price pressure from new qualified suppliers
  • Supply interruption or quality deviation causes contract loss
  • Margin contraction from higher compliance cost and expediting for continuity

Key sources for metronidazole indication coverage

Drug information references document metronidazole’s antibacterial and antiprotozoal uses and typical clinical role. For investment diligence, these are useful for confirming guideline-level indication scope that supports volume expectations.


Key Takeaways

  • Metronidazole is a mature, generic antimicrobial where the investment case depends on procurement execution, supply reliability, and cost position rather than patent-driven growth.
  • Core demand is driven by stable clinical use in anaerobic infections and key protozoal and gynecologic indications, which supports repeat contracting but not premium pricing.
  • The biggest upside comes from winning tenders and maintaining qualification status with consistent quality and on-time supply.
  • The primary risks are price compression, supply disruption, and regulatory enforcement that can quickly translate into lost contract share.
  • Underwrite metronidazole on SKU-level economics, tender-linked revenue durability, and manufacturing quality KPIs.

FAQs

1) Is metronidazole a growth investment or a cash-flow investment?

It is typically a cash-flow and operational efficiency investment, because clinical differentiation is limited and the market is structurally generic with tender-driven pricing.

2) What determines performance most for metronidazole portfolios?

Realized selling price from tenders, gross margin from cost position, and qualification reliability tied to batch release performance and inspection outcomes.

3) Does metronidazole have near-term exclusivity that can protect pricing?

Metronidazole is an old molecule with long-expired primary exclusivities in major markets; protection in practice comes from regulatory and manufacturing execution at the SKU level rather than patent runway.

4) Which risks hit revenue fastest in generics like metronidazole?

Tender re-awards and qualification status changes; a quality or supply failure can lead to immediate contract loss.

5) How should investors benchmark cost competitiveness?

Benchmark on API and manufacturing unit economics, on-time delivery, batch acceptance rates, and gross margin by presentation and region rather than on branded-like metrics.


References (APA)

  1. National Library of Medicine. (n.d.). Metronidazole. Drug Information Portal. https://druginfo.nlm.nih.gov
  2. World Health Organization. (n.d.). WHO model list of essential medicines: Metronidazole. https://www.who.int
  3. European Medicines Agency. (n.d.). Assessment history and public documents for nitroimidazole antimicrobials (metronidazole-related products). https://www.ema.europa.eu

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