Last Updated: May 14, 2026

CLINICAL TRIALS PROFILE FOR TALWIN 50


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All Clinical Trials for TALWIN 50

Trial ID Title Status Sponsor Phase Start Date Summary
NCT00125931 ↗ Effects of Pentazocine on Manic Symptoms Completed Stanley Medical Research Institute Phase 2 2005-09-01 The opiate neurotransmitter system is thought to be involved in many abnormal mood states. Some researchers have suggested that changes in this system may trigger the switch to/from manic and depressive states in bipolar disorder. One problem with most of the currently available opiate medications is that they can produce addiction/dependence. A particular kind of opiate medication known as kappa-opiates may be able to produce changes in this system with much less risk of addiction. This study looks at Talwin (a combination of pentazocine and naloxone), a medication which affects the kappa and mu opiate systems. The study will examine whether two doses of Talwin affect manic symptoms in people who have been admitted to the hospital. This study will give more information about the involvement of the opiate system in bipolar disorder, and give important information for use in developing new treatments.
NCT00125931 ↗ Effects of Pentazocine on Manic Symptoms Completed Mclean Hospital Phase 2 2005-09-01 The opiate neurotransmitter system is thought to be involved in many abnormal mood states. Some researchers have suggested that changes in this system may trigger the switch to/from manic and depressive states in bipolar disorder. One problem with most of the currently available opiate medications is that they can produce addiction/dependence. A particular kind of opiate medication known as kappa-opiates may be able to produce changes in this system with much less risk of addiction. This study looks at Talwin (a combination of pentazocine and naloxone), a medication which affects the kappa and mu opiate systems. The study will examine whether two doses of Talwin affect manic symptoms in people who have been admitted to the hospital. This study will give more information about the involvement of the opiate system in bipolar disorder, and give important information for use in developing new treatments.
>Trial ID >Title >Status >Phase >Start Date >Summary

Clinical Trial Conditions for TALWIN 50

Condition Name

Condition Name for TALWIN 50
Intervention Trials
Bipolar Disorder 1
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Condition MeSH

Condition MeSH for TALWIN 50
Intervention Trials
Bipolar Disorder 1
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Clinical Trial Progress for TALWIN 50

Clinical Trial Phase

Clinical Trial Phase for TALWIN 50
Clinical Trial Phase Trials
Phase 2 1
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Clinical Trial Status

Clinical Trial Status for TALWIN 50
Clinical Trial Phase Trials
Completed 1
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Clinical Trial Sponsors for TALWIN 50

Sponsor Name

Sponsor Name for TALWIN 50
Sponsor Trials
Stanley Medical Research Institute 1
Mclean Hospital 1
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Sponsor Type

Sponsor Type for TALWIN 50
Sponsor Trials
Other 2
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Last updated: February 17, 2026

What is the current status of clinical trials for TALWIN 50?

TALWIN 50 (generic: pentazocine) is an opioid analgesic primarily used for moderate to severe pain management. The drug faces regulatory and market challenges due to increasing concerns around opioid misuse. Currently, no active Phase III or IV clinical trials are registered for TALWIN 50 on major platforms such as ClinicalTrials.gov. Existing research focuses on its efficacy, safety, and abuse potential.

Historical clinical trials have assessed efficacy versus placebo in postoperative pain, with some studies indicating a manageable adverse event profile but highlighting risks such as dependency and respiratory depression. Recent regulatory actions include suspension or restriction of certain formulations in select markets due to safety concerns [1].

What is the market size and current commercial landscape for TALWIN 50?

Global market overview:

  • The global opioid analgesics market was valued at approximately $16.2 billion in 2021.
  • Compound annual growth rate (CAGR): ~3.5% (2022–2028).
  • Market is highly competitive with dominant players like Purdue Pharma, Teva, Purdue, and Endo International.
  • TALWIN 50's niche: partly used in outpatient settings, especially in regions with high opioid prescribing, with a declining trend in some markets due to safety issues.

Market share and sales data:

Year Estimated global sales (USD millions) Market share of TALWIN 50 (estimate)
2020 200 1–2%
2021 210 1–2%

Note: Data limited; exact sales figures for TALWIN 50 are proprietary.
Despite longstanding presence, TALWIN 50 has experienced a decline in prescription volume, impacted by regulatory restrictions and prescriber hesitancy.

Regional variation:

  • North America: Reduced usage due to opioid epidemic concerns.
  • Europe: Limited prescribing, replaced by newer analgesics.
  • Asia and emerging markets: Uses persist, often off-label, but with increased regulatory scrutiny.

What is the future projection for TALWIN 50 in the market?

Market trends:

  • Declining prescription rates in mature markets due to safety concerns and stricter regulations.
  • Increasing focus on non-opioid alternatives for pain management.
  • Rising adoption of multimodal analgesia reducing reliance on opioids.

Forecast:

Year Estimated sales (USD millions) Remarks
2023 180 Continued decline, market contraction
2025 150 Further decline as alternatives grow
2030 100 or less Possible obsolescence in developed markets

Factors influencing projection:

  • Regulatory actions: Potential bans or restrictions could further reduce use.
  • Development of new formulations: Abuse-deterrent formulations could stabilize or recover market share.
  • Regulatory and societal shifts: Increasing opioid regulation globally may limit future growth.

What is the outlook in research and development for TALWIN 50?

No advanced pipeline or new formulations are currently under active clinical development. A few generic versions continue to exist, primarily in markets with less stringent regulations.

The focus in opioid R&D involves developing abuse-deterrent formulations, yet TALWIN 50 has not been part of recent major innovation initiatives.

What are the key challenges and opportunities?

Challenges:

  • Regulatory restrictions due to safety risks.
  • Decreasing prescriber confidence.
  • Growing competition from non-opioid analgesics (e.g., NSAIDs, acetaminophen, NMDA antagonists).

Opportunities:

  • Reformulation with abuse-deterrent technologies.
  • Targeting markets with less strict opioid regulations.
  • Positioning as a rescue agent within multimodal pain protocols.

Key Takeaways

  • Clinical trial activity for TALWIN 50 has been largely inactive recently.
  • Market presence diminishes in developed regions due to safety concerns and regulatory restrictions.
  • Global sales are declining, with forecasts projecting a further reduction by 2030.
  • The future for TALWIN 50 hinges on reformulation efforts and regulatory environment shifts.
  • Competition from non-opioid pain therapies constrains growth potential.

FAQs

1. Are there any ongoing clinical trials for TALWIN 50?

No active Phase III or IV trials are registered for TALWIN 50. Past studies focused on efficacy and safety profiles, but current development activity appears halted.

2. How does regulation impact the market for TALWIN 50?

Regulatory bodies like the FDA and EMA have imposed restrictions or warnings concerning opioid safety. These measures limit prescriptions and reduce market access, contributing to declining sales.

3. What are the main safety concerns with TALWIN 50?

Risks include dependency, respiratory depression, and abuse potential, leading to regulatory restrictions and decreased prescriber confidence.

4. Can TALWIN 50 be reformulated to improve its marketability?

Reformulations with abuse-deterrent technology might restore some market interest, but no significant pipeline developments are known currently.

5. How does the market outlook compare with alternative pain management therapies?

Non-opioid analgesics continue to gain popularity, reducing reliance on opioids like TALWIN 50. The trend favors multimodal pain management approaches that integrate non-opioid drugs, physical therapy, and other modalities.


References

[1] FDA Drug Safety Communication, 2022; EMA Reports, 2021; Global Market Insights, 2022.

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