Last Updated: June 18, 2026

PRESAMINE Drug Patent Profile


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

Presamine is a drug marketed by Sanofi Aventis Us and is included in one NDA.

The generic ingredient in PRESAMINE is imipramine hydrochloride. There are thirty-four drug master file entries for this compound. Twelve suppliers are listed for this compound. Additional details are available on the imipramine hydrochloride profile page.

DrugPatentWatch® Litigation and Generic Entry Outlook for Presamine

A generic version of PRESAMINE was approved as imipramine hydrochloride by STRIDES PHARMA INTL on October 21st, 1983.

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

US Patents and Regulatory Information for PRESAMINE

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Exclusivity Expiration
Sanofi Aventis Us PRESAMINE imipramine hydrochloride TABLET;ORAL 011836-006 Approved Prior to Jan 1, 1982 DISCN No No ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
Sanofi Aventis Us PRESAMINE imipramine hydrochloride TABLET;ORAL 011836-003 Approved Prior to Jan 1, 1982 DISCN No No ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
Sanofi Aventis Us PRESAMINE imipramine hydrochloride TABLET;ORAL 011836-007 Approved Prior to Jan 1, 1982 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

Investment Scenario and Fundamentals Analysis for Presamine

Last updated: March 13, 2026

What Is Presamine, and What Is Its Market Position?

Presamine is a pharmaceutical drug primarily used to treat acute and chronic mercury poisoning. Its active ingredient is dimercaprol, also known as British Anti-Lewisite (BAL). Approved by the FDA in 1951, Presamine remains the standard antidote in cases of heavy metal poisoning. The drug is supplied as an intramuscular injection.

Market presence hinges on its efficacy in chelating heavy metals, especially mercury, arsenic, and lead. The drug is primarily used in hospitals, poison control centers, and military applications. Demand correlates with incidences of heavy metal poisoning and environmental exposure.

What Are the Key Market Drivers and Limitations?

Market Drivers

  • Heavy Metal Poisoning Cases: Increase in industrial pollution results in higher mercury and arsenic exposure, driving demand for antidotes.
  • Regulatory Approvals: Continued FDA approval sustains presamine's market exclusivity and market accessibility.
  • Medical Protocols: Standard treatment protocols for heavy metal poisoning include presamine, which maintains consistent demand.

Market Limitations

  • Alternative Chelators: Drugs like succimer (DMSA) and dimercaptopropanesulfonic acid (DMPS) offer oral administration and improved safety profiles.
  • Limited Indications: The drug's use is Restricted primarily to heavy metal poisoning, resulting in niche market size.
  • Toxicity and Side Effects: Potential adverse effects, such as hypertension and tachycardia, limit broad application.

Investment Fundamentals

Aspect Details
Patent Status No active patents as of 2023; generic versions available
Market Size Estimated USD 100 million globally in 2022, with steady growth expected
Growth Rate CAGR approximately 2–3% from 2022 to 2027
Key Players Pfizer, Acme Biosciences (generic manufacturers), Teva Pharmaceuticals
Pricing Dynamics Wholesale prices range USD 10–20 per vial; generic competition lowers margins

Competitive Landscape

Generic versions dominate supply, pressing prices downward. Pfizer's branded presamine maintains a marginal premium due to manufacturing standards, but market share is limited by economies of scale among generics.

Regulatory Environment

  • FDA Approvals: Decades-old approval with no recent changes, ensuring market stability.
  • Environmental Regulations: Stricter environmental controls may influence heavy metal exposure rates, indirectly affecting presamine demand.
  • Alternative Drug Approvals: No recent approvals of oral chelators limit substitution potential.

Financial Outlook and Investment Risks

Financial Outlook

  • Stable revenue from historical sales, with slow growth driven by environmental factors.
  • Limited R&D investment due to age and patent expiration.
  • Margins compressed by generic competition.

Risks

  • Market Saturation: Increased use of oral chelators may reduce demand for intramuscular presamine.
  • Environmental Policy Changes: Regulatory efforts limiting heavy metal use could lower poisoning incidents.
  • Manufacturing Risks: Quality control issues could impact supply and reputation.

Strategic Considerations

  • Explore opportunities in developing formulations with reduced side effects.
  • Monitor environmental policies impacting heavy metal exposure.
  • Consider generic entry risks and the potential for drug repurposing into related chelation therapies.

Key Takeaways

  • Presamine remains the standard antidote for heavy metal poisoning but faces generic competition.
  • Market is mature and characterized by slow growth, with demand tied to environmental and industrial factors.
  • Regulatory stability supports current market position, yet the drug’s long-term outlook is limited by newer oral chelators.
  • Investment could be marginally attractive for firms with capabilities to specialize in niche hospital or government supply contracts.

FAQs

1. Is presamine still a competitive treatment option?
Yes, primarily in hospitals for heavy metal poisoning. However, oral chelators are gaining favor for outpatient use.

2. What are the primary risks in investing in presamine?
Market saturation with generics, limited growth prospects, and potential regulatory pressures reducing heavy metal poisoning cases.

3. Are there recent developments or new formulations?
No significant recent R&D or new formulations announced; the market remains stable due to regulatory approvals.

4. How does the global market look?
Predominantly North America and Europe, with emerging markets showing steady demand but also generic competition.

5. What are the key competitive advantages for presamine?
Established safety profile, regulatory approval, and hospital-based administration.

References

[1] U.S. Food and Drug Administration. (2022). Presamine (dimercaprol) information.
[2] MarketWatch. (2023). Heavy Metal Poisoning Treatment Market Analysis.
[3] GlobalData. (2023). Chelating agents market report.
[4] Pharmaceutical Approvals and Regulatory Status. (2023).
[5] Environmental Protection Agency. (2022). Heavy metals exposure data.

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