Last Updated: May 3, 2026

CLONAZEPAM Drug Patent Profile


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Which patents cover Clonazepam, and when can generic versions of Clonazepam launch?

Clonazepam is a drug marketed by Alembic, Barr, Ph Health, Sun Pharm Inds Inc, Accord Hlthcare, Actavis Elizabeth, Aurobindo Pharma Usa, Chartwell Rx, Pharmobedient, Prinston Inc, Rubicon Research, Sandoz, Teva, and Watson Labs. and is included in sixteen NDAs.

The generic ingredient in CLONAZEPAM is clonazepam. There are ten drug master file entries for this compound. Thirty suppliers are listed for this compound. Additional details are available on the clonazepam profile page.

DrugPatentWatch® Litigation and Generic Entry Outlook for Clonazepam

A generic version of CLONAZEPAM was approved as clonazepam by TEVA on September 10th, 1996.

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Summary for CLONAZEPAM
US Patents:0
Applicants:14
NDAs:16

US Patents and Regulatory Information for CLONAZEPAM

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Exclusivity Expiration
Rubicon Research CLONAZEPAM clonazepam TABLET;ORAL 075468-003 Oct 6, 2000 AB RX No No ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
Chartwell Rx CLONAZEPAM clonazepam TABLET;ORAL 074925-003 Sep 30, 1997 AB RX No No ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
Teva CLONAZEPAM clonazepam TABLET;ORAL 074920-001 Aug 4, 1998 DISCN No No ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
Sun Pharm Inds Inc CLONAZEPAM clonazepam TABLET;ORAL 075423-001 Apr 27, 2001 DISCN 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

Clonazepam (CLZ): Investment Scenario and Fundamentals Analysis

Last updated: April 25, 2026

What is clonazepam and what does the market actually buy?

Clonazepam (CLZ) is a benzodiazepine marketed for epilepsy/seizure disorders and panic disorder, and used off-label in multiple CNS indications depending on jurisdiction. In commercial practice, CLZ is a high-volume, low-unit-value generic-heavy product where demand tracks (1) baseline prevalence of treated conditions, (2) prescriber switching within benzodiazepine classes, (3) payer controls, and (4) controlled-substance compliance and distribution constraints.

The investability of clonazepam is therefore driven less by “pipeline optionality” and more by:

  • Regulatory and controlled-substance licensing execution
  • Cost-to-serve and supply reliability
  • Interchangeability and formulary status
  • Patent and exclusivity walls around specific formulations, strengths, and delivery formats (where they exist)

Why does clonazepam price and margin behave the way it does?

Clonazepam is widely available as generics, which compresses branded-style pricing. In mature benzodiazepine markets, pricing typically reflects:

  • Therapeutic class substitution: prescribers and payers shift among benzodiazepines based on formulary tiering, tolerability, and patient history.
  • Generic competition intensity: more suppliers tends to reduce net pricing and gross margin.
  • Manufacturing and compliance costs: controlled-substance handling, serialization/track-and-trace where applicable, and API sourcing affect cost curves more than incremental R&D.

Market takeaway: returns skew toward supply-chain execution and scale rather than differentiation.

What supply and demand fundamentals should an investor underwrite?

Demand drivers

Demand for clonazepam generally correlates with:

  • Chronic epilepsy treatment (especially in treatment regimens that historically include benzodiazepines as adjuncts)
  • Panic disorder prescribing patterns in markets where benzodiazepines remain used after guideline cycles
  • Treatment continuity: benzodiazepines often require long-term dosing, so attrition is slow unless safety policy, deprescribing initiatives, or substitution dynamics accelerate

Demand risks

Key downside risks are not “clinical” but policy and payer-driven:

  • Benzodiazepine prescribing restrictions and deprescribing mandates in certain health systems
  • Tighter controlled-substance auditing that can disrupt distribution, especially for smaller suppliers
  • Substitution away from benzodiazepines toward other anxiolytics or antiepileptics that face fewer controlled-substance constraints in practice

How is clonazepam legally monetized in 2026?

Clonazepam’s core molecule is long past primary patent cover in most major jurisdictions; commercial monetization typically rests on:

  1. Generic product scale and distribution
  2. Site approvals and DMF/CEP maintenance (where used)
  3. Lifecycle extensions that are specific to certain dosage forms or manufacturing processes, if any current exclusivity exists in a jurisdiction
  4. Controlled-substance regulatory history and supply credibility

Investment implication: the dominant “fundamental” is supplier capability, not patent moat.

What are the product and regulatory characteristics that shape investment performance?

Controlled-substance operating model

Clonazepam is a benzodiazepine and is regulated as a controlled substance in the US and most OECD jurisdictions. That creates investment-relevant operational constraints:

  • Distribution licensing and secure chain-of-custody
  • Quota-like procurement dynamics for APIs or finished goods depending on jurisdictional mechanics
  • Audit readiness: documentation, serialization, and deviation handling

Quality systems as a profit lever

Because generics compete on price, quality lapses lead to:

  • Market withdrawals or suspension
  • Loss of payer or pharmacy network contracts
  • Long regaining timelines

This is why top-tier suppliers often keep a better margin profile than the rest, even when net price falls.

Investment scenario: base case, downside case, and upside case

Base case (most likely in mature generics)

Assumptions

  • Competitive pressure stays intact
  • Demand remains stable for treated populations
  • No material supply disruption from major manufacturers
  • Generic net price declines modestly as new entrants appear, then stabilizes

Expected investor outcome

  • Returns track volume and share, not differentiation
  • Margin expansion comes from cost-down and working-capital efficiency (inventory turns, API sourcing terms)

Downside case (supply shock or policy tightening)

Assumptions

  • One or more suppliers face regulatory actions, quality issues, or production constraints
  • Payer or health-system policies restrict benzodiazepine prescribing or increase prior authorization burden
  • Controlled-substance distribution friction increases

Expected investor outcome

  • Short-term pricing relief can occur, but it is usually offset by lost supply flexibility, higher compliance cost, and contract churn
  • Volatility rises, but the longer-term risk is demand softness and formulary contraction

Upside case (quality-led share gains)

Assumptions

  • A high-quality incumbent expands distribution through pharmacy group agreements and formulary repositioning
  • Competitors experience supply interruptions and fail to meet service levels
  • The investor controls reliable manufacturing and distribution execution

Expected investor outcome

  • Volume outperformance drives EBITDA even if net price stays compressed
  • Cash conversion improves with stable manufacturing yields and fewer deviations

What metrics should underwrite an investment thesis in clonazepam?

For a generic-centric investment thesis, the “fundamentals” are operational.

Supply and commercial KPIs

  • Market share by strength and dosage form
  • On-time-in-full (OTIF) delivery rate
  • Unit cost trend (API conversion costs, yield, scrap, energy, batch cycle times)
  • Gross margin vs. peer curve (watch for hidden costs: compliance, returns, recalls)
  • Contract renewal rate with wholesalers, PBMs, and institutional channels

Regulatory and quality KPIs

  • FDA or regulator warning letters / consent decrees history (or equivalent actions)
  • Inspection outcomes and remediation timelines
  • Batch rejection rates and out-of-spec frequency
  • Customer complaint rates tied to potency, content uniformity, or dissolution

Where do investors find alpha in a “mature drug” like clonazepam?

Alpha usually comes from one of two buckets:

  1. Supply leadership

    • Proven manufacturing scale
    • Low deviation rates
    • Distribution reliability that keeps contracts during shortages
  2. Targeted lifecycle or formulation advantages

    • If a jurisdiction grants exclusivity for a specific presentation, route, or manufacturing process, that can create a temporary margin wedge.
    • Absent exclusivity, formulation changes rarely sustain premium pricing against interchangeable generics.

Business model map: who benefits and who loses

Likely beneficiaries

  • Large generic manufacturers with secure API supply, stable yields, and mature controlled-substance operations
  • Companies that can sustain service levels during competitor disruption
  • Contract manufacturers with consistent inspection outcomes and strong documentation

Likely laggards

  • Firms with fragile API sourcing or higher deviation rates
  • Smaller players exposed to distribution or quota-like procurement dynamics without buffer inventory
  • Businesses lacking scale in controlled-substance compliance overhead

Key Takeaways

  • Clonazepam is a mature, generics-driven CNS product where investment performance depends primarily on supply reliability, controlled-substance execution, and quality systems, not on patent-led differentiation.
  • Demand is stable and chronic, but risks come from policy pressure on benzodiazepine prescribing and operational disruption in regulated distribution.
  • The most actionable thesis is operational: track OTIF, market share by strength, unit cost trend, gross margin vs peers, and quality inspection outcomes.
  • Upside is typically share capture during supply gaps; downside is contract loss and margin compression driven by quality or distribution failures.

FAQs

1) Is clonazepam a patent-moled story?

No. Commercial value is largely tied to generic manufacturing scale, compliance, and reliability rather than long-lived molecular exclusivity.

2) What most affects clonazepam profitability?

Manufacturing yield, batch outcomes, controlled-substance handling cost, and service-level performance with wholesalers and institutional customers.

3) Does demand fluctuate sharply?

Demand is generally chronic and not purely discretionary, but it can soften when payers or health systems restrict benzodiazepine prescribing.

4) What risk is unique to clonazepam versus non-controlled generics?

Operational disruption from controlled-substance compliance, auditing, and distribution licensing constraints can create supply volatility and contract churn.

5) What is the fastest route to outperform in clonazepam?

Quality and logistics execution that converts into market-share gains when competitors face supply or compliance issues.


References

[1] U.S. Food and Drug Administration. Drug Development and Drug Interactions: Clonazepam (Prescribing Information and Safety Communications). FDA database and labeling repositories. https://www.fda.gov/ (accessed 2026-04-25).
[2] U.S. Drug Enforcement Administration. Controlled Substance Scheduling Information. DEA resources and regulatory framework. https://www.dea.gov/ (accessed 2026-04-25).
[3] DailyMed. Clonazepam Drug Label Information. National Library of Medicine resource for medication labeling. https://dailymed.nlm.nih.gov/ (accessed 2026-04-25).

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