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Last Updated: March 18, 2026

PROPACET 100 Drug Patent Profile


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Which patents cover Propacet 100, and what generic alternatives are available?

Propacet 100 is a drug marketed by Teva and is included in one NDA.

The generic ingredient in PROPACET 100 is acetaminophen; propoxyphene napsylate. There are sixty-six drug master file entries for this compound. Additional details are available on the acetaminophen; propoxyphene napsylate profile page.

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Summary for PROPACET 100
US Patents:0
Applicants:1
NDAs:1

US Patents and Regulatory Information for PROPACET 100

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Exclusivity Expiration
Teva PROPACET 100 acetaminophen; propoxyphene napsylate TABLET;ORAL 070107-001 Jun 12, 1985 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

Propacet 100: Investment Scenario, Market Dynamics, and Financial Trajectory

Last updated: February 3, 2026

Executive Summary

Propacet 100, a combination analgesic containing propoxyphene and acetaminophen, has historically seen declining use due to safety concerns. The current market landscape reflects increased regulatory scrutiny, shifts towards safer alternatives, and evolving prescribing habits. This report provides a comprehensive analysis of the investment potential, market dynamics, and future financial trajectory of Propacet 100, considering ongoing regulatory decisions, patentitories, manufacturing, and competitive factors.


1. Overview of Propacet 100

Component Details
Active ingredients Propoxyphene (100 mg) + Acetaminophen (650 mg)
Therapeutic class Opioid analgesic + Non-opioid analgesic combination
Market history Launched mid-20th century; widely used until safety concerns arose
Regulatory status (as of 2023) Suspended or banned in multiple markets, including US, EU
Legal status globally Restricted, withdrawn, or under re-evaluation

2. Investment Scenario of Propacet 100

2.1 Market Viability and Demand

Factor Impact Commentary
Regulatory restrictions Negative Numerous countries, including the U.S. FDA (2010), banned propoxyphene products due to cardiovascular risks[^1].
Market demand for analgesics Declining Shift towards safer opioids (e.g., morphine, oxycodone), non-opioid alternatives (NSAIDs, acetaminophen alone).
Potential niche markets Limited Use in specific populations or in countries with lax regulations, but likely diminutive.
Legal liabilities & litigation risks High Past lawsuits related to toxicity and deaths decrease investor appeal.

2.2 Patent and Regulatory Status

Aspect Details Impact
Patent expiry Patent for Propacet 100 likely expired or soon to expire Reduced exclusivity, increased competition.
Regulatory approvals Suspended/banned in key markets Significant barriers to re-entry or reformulation.
Reformulation prospects Low due to safety profile of active ingredients Unlikely due to inherent toxicity issues.

2.3 Manufacturing and Supply Chain Considerations

Challenges Details Impact
Raw material sourcing Generic API availability, but with safety-related constraints No significant supply chain advantage, given market decline.
Manufacturing costs Low, but market demand negligible Limited profit margin potential.
Distribution channels Declined, due to regulatory suspensions Restricted distribution, leading to reduced revenue streams.

2.4 Competitive Landscape

Major Competitors Alternatives in Pain Management Market Position
NSAIDs (ibuprofen, naproxen) Safer, OTC options Dominant OTC analgesic market
Opioids (morphine, oxycodone) Prescribed in severe cases Regulated, with controlled prescribing practices
Other combination analgesics Tramadol + acetaminophen, etc. Competitive, safer options

3. Market Dynamics Influencing Propacet 100

3.1 Regulatory Environment

Policy Developments Implication
FDA ban (2010) Propoxyphene withdrawn; physicians prescribe alternatives
European Medicines Agency (EMA) policies Similar restrictions, bans in EU territories
Emerging safetyn measures Increased scrutiny on opioid combinations

3.2 Prescribing Trends & Physician Behavior

Trend Impact
Decreased prescription volumes Due to safety concerns and legal liabilities
Shift to safer analgesics NSAIDs, acetaminophen-only options on rise
Patient safety-focused prescribing Reduced demand for Propacet 100

3.3 Market Penetration & Geographic Variations

Region Market Status
United States Removed from formulary; negligible demand
Europe Banned or restricted; limited supply and sales
Asia, Africa Limited data; potentially weak demand due to safety issues

4. Financial Trajectory and Investment Outlook

Scenario Description Projected Outcome
Status Quo Continued regulatory bans, declining demand Market exit, minimal or no revenue
Reformulation or Reintroduction Development of safer analogs or reformulated versions Unlikely, given inherent toxicity; high R&D costs
Potential Niche Market Development Small-scale use in specific regions or for research purposes Marginal revenues, not substantial for major investors

4.1 Revenue Projections (Hypothetical)

Year Estimated Revenue Assumptions Source
2023 $0 million Regulatory bans in major markets, minimal demand Market analysis based on legal actions and policy changes
2025 $0 million Continued restrictions Regulatory environment remains prohibitive
2030 $0 million No re-entry or reformulation Safety profile precludes revival

4.2 Investment Risks

Risk Factor Impact Mitigation Strategies
Regulatory bans Eliminates market access Focus on alternative drugs or markets
Legal liabilities Financial liabilities, reputational risk No active investment; consider historical analysis
Market decline Diminished revenue, خسائر مالية Diversification into safer pharmacological segments
Reformulation failure R&D costs, no market re-entry Test alternative compounds with better safety profiles

5. Comparative Analysis with Similar Drugs

Drug Status Market Dynamics Regulatory Actions
Propoxyphene (original agent) Banned/regulatory suspension Reacted to cardiotoxicity; replaced by safer opioids FDA ban (2010)
Tramadol + Acetaminophen Approved, popular analgesic Safer profile, increasing prescription utilization Regulatory oversight, monitoring
Oxycodone/Acetaminophen Approved, common opioid combo Controlled prescribing, risk management programs Strict regulation in key markets

Conclusion & Key Takeaways

  1. Market viability for Propacet 100 is non-existent in key markets due to the inherent safety risks associated with propoxyphene, leading to bans and restrictions globally.

  2. Regulatory environments have effectively eliminated Propacet 100 from major pharmaceutical markets, drastically reducing or eliminating revenue potential.

  3. Reformulation prospects are minimal, considering safety risks embedded in the active compounds and the lack of a clear pathway to develop a safer analog that could re-enter the market.

  4. Therapeutic shifts favor safer, non-opioid analgesics, such as NSAIDs and acetaminophen monotherapy, diminishing the demand for combination drugs like Propacet 100.

  5. Future investment opportunities should focus on alternative pain management therapies, especially those backed by a stronger safety profile and regulatory support.


FAQs

Q1: Is Propacet 100 still available in any global markets?

A: As of 2023, Propacet 100 is largely withdrawn or banned in major markets including the United States, European Union, Canada, and Australia, due to safety concerns. Some limited or unregulated markets may still have it, but its availability is minimal and legally questionable.

Q2: Are there any ongoing efforts to reformulate Propacet 100?

A: No significant reformulation efforts are underway. Given the toxicity associated with propoxyphene, pharmaceutical companies and regulators have moved toward safer alternatives, rendering reformulation impractical.

Q3: What is the primary legal risk associated with Propacet 100?

A: The drug has been linked to increased risk of cardiac toxicity and fatalities, leading to numerous lawsuits and legal liabilities for manufacturers. Such liabilities add further deterrents for any reintroduction.

Q4: What are the alternative drugs replacing Propacet 100 in pain management?

A: Safer alternatives include NSAIDs (ibuprofen, naproxen), acetaminophen alone, and newer opioids with better safety profiles such as oxycodone or tramadol, subject to regulatory controls.

Q5: Should investors consider the secondary market or research applications for Propacet 100?

A: The secondary market for Propacet 100 is extremely limited; research applications are rare due to safety issues. Investment focus should be on developing or supporting safer pain management solutions.


References

[1] U.S. Food and Drug Administration. (2010). FDA Drug Safety Communication: FDA recommends against the use of propoxyphene (Darvon, Darvocet) and advises patients to stop taking these medicines.

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