Last Updated: May 3, 2026

SANSAC Drug Patent Profile


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

Sansac is a drug marketed by Dow Pharm and is included in one NDA.

The generic ingredient in SANSAC is erythromycin. There are one hundred and three drug master file entries for this compound. Thirty-three suppliers are listed for this compound. Additional details are available on the erythromycin profile page.

DrugPatentWatch® Litigation and Generic Entry Outlook for Sansac

A generic version of SANSAC was approved as erythromycin by TORRENT on July 6th, 2020.

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

US Patents and Regulatory Information for SANSAC

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Exclusivity Expiration
Dow Pharm SANSAC erythromycin SOLUTION;TOPICAL 062522-001 Jan 24, 1985 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

Last updated: February 10, 2026

mmary
SANSAC (generic name: carisoprodol) is a centrally acting muscle relaxant historically prescribed for acute musculoskeletal pain. Its investment prospects hinge on patent status, regulatory environment, market demand, competitive landscape, and safety profile. Current data suggests limited growth potential due to regulatory restrictions, safety concerns, and market saturation with alternative therapies.


What Are the Core Fundamentals of SANSAC?

Chemical and Pharmacological Profile

  • Generic Name: Carisoprodol
  • Mechanism: Acts on the central nervous system to produce muscle relaxation.
  • Approved Use: Short-term relief of discomfort associated with acute musculoskeletal conditions (FDA-approved since 1959).

Market Dynamics

  • Market Size: Approximately $150 million globally (2018 data) with declining prescriptions.
  • Key Markets: U.S., Europe, Japan.
  • Leading Competitors: Flexeril (cyclobenzaprine), methocarbamol, tizanidine.
  • Prescription Trends: Decreasing, attributed to safety concerns and adverse event reports.

Regulatory Status

  • U.S.: FDA classified carisoprodol as a Schedule IV controlled substance in 2012, citing abuse potential and dependency risks.
  • Europe and Asia: Varying regulations, with some countries restricting or banning its use.
  • Patent Status: No active patents; multiple generic versions exist.

Safety and Usage Profile

  • Adverse Effects: Drowsiness, dizziness, dependency, withdrawal symptoms.
  • Regulatory Warnings: Abuse potential, contraindicated in certain populations (e.g., those with history of substance abuse).
  • Prescriber Sentiment: Declining, driven by safety profile and availability of alternatives.

What Are the Investment Opportunities and Risks?

Opportunities

  • Niche Use Cases: Potential in formulations targeting specific patient subsets with lower abuse potential.
  • Regulatory Resets: Reformulation or combination therapies could renew clinical interest.
  • Market Expansion: Countries with less restrictive controls might offer growth avenues.

Risks

  • Regulatory Restrictions: U.S. FDA schedules controlled substance, complicating prescribing and market access.
  • Market Decline: Prescriptions have decreased more than 60% over the last decade.
  • Safety Profile: Ongoing reports of abuse and dependency hinder wider adoption.
  • Patent and Market Competition: No patent protection; high generic competition suppresses prices.

Financial Metrics

  • Revenue Trends: Declined from ~$160 million in 2014 to under $50 million in 2022.
  • Pricing: Low-margin due to generic competition.
  • R&D Investment: Minimal, primarily focused on new formulations or indications.

What Are the Strategic Considerations for Investors?

  • Patent and Regulatory Outlook: No patent exclusivity; regulatory hurdles due to abuse potential.
  • Market Growth Potential: Limited, adverse safety profile restricts expansion.
  • Competitive Landscape: Significant generic competition, with many substitutes.
  • Therapeutic Alternatives: Off-label uses and newer muscle relaxants with better safety profiles.

Investors considering pharmaceutical assets should evaluate whether niche repositioning or reformulation can sustain or revive revenue streams. For SANSAC, current fundamentals suggest a mature, declining market with limited upside absent significant regulatory or formulation breakthroughs.


Key Takeaways

  • SANSAC’s core market has contracted due to safety concerns and regulation.
  • Generic competition limits pricing power, reducing revenue potential.
  • Regulatory risks dominate its outlook, especially in the U.S. and Europe.
  • Market expansion prospects are limited, with growth primarily confined to emerging markets.
  • Strategic value may lie in reformulation or repositioning as a safer alternative, but no current evidence supports significant near-term upside.

FAQs

1. Why did SANSAC prescriptions decline sharply after 2012?
The FDA classified carisoprodol as a Schedule IV controlled substance, citing high abuse and dependency potential, which restricted prescribing practices.

2. Are there any ongoing clinical trials to reposition SANSAC?
No significant trials are underway. Most research focuses on newer muscle relaxants with better safety profiles.

3. Can reformulating SANSAC mitigate regulatory risks?
Reformulation may reduce abuse potential, but regulatory agencies are cautious due to history. Reformulation requires costly clinical development, with uncertain prospects.

4. How does SANSAC compare to its competitors?
It has similar efficacy to other muscle relaxants but has a worse safety profile, which limits its market share and prescriber preference.

5. What regulatory environment shifts could benefit SANSAC?
Reduction in abuse reports or approval of safer formulations could open niche markets; however, current trends favor non-controlled muscle relaxants.


References

[1] U.S. Food and Drug Administration. "FDA Drug Schedule." 2012.
[2] MarketWatch. "Muscle Relaxants Market Size, Share & Trends." 2018.
[3] U.S. Patent and Trademark Office. Patent status data.
[4] FDA. "Drug Safety Communications." 2012.
[5] IMS Health. Prescription Data. 2022.

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