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Last Updated: December 11, 2025

PHENAPHEN W/ CODEINE NO. 4 Drug Patent Profile


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When do Phenaphen W/ Codeine No. 4 patents expire, and what generic alternatives are available?

Phenaphen W/ Codeine No. 4 is a drug marketed by Robins Ah and is included in one NDA.

The generic ingredient in PHENAPHEN W/ CODEINE NO. 4 is acetaminophen; codeine phosphate. There are sixty-six drug master file entries for this compound. Twenty-nine suppliers are listed for this compound. Additional details are available on the acetaminophen; codeine phosphate profile page.

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Summary for PHENAPHEN W/ CODEINE NO. 4
Drug patent expirations by year for PHENAPHEN W/ CODEINE NO. 4

US Patents and Regulatory Information for PHENAPHEN W/ CODEINE NO. 4

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Exclusivity Expiration
Robins Ah PHENAPHEN W/ CODEINE NO. 4 acetaminophen; codeine phosphate CAPSULE;ORAL 084446-001 Approved Prior to Jan 1, 1982 DISCN Yes 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

Market Dynamics and Financial Trajectory for PHENAPHEN W/ CODEINE NO. 4

Last updated: July 30, 2025


Introduction

PHENAPHEN W/ CODEINE NO. 4 is a combination pharmaceutical product primarily used to manage moderate to severe pain, integrating acetaminophen (paracetamol) and codeine. Its market presence reflects broader trends in pain management, regulatory oversight, and evolving consumer needs. An in-depth understanding of its market dynamics and financial trajectory offers vital insights for pharmaceutical stakeholders, investors, and policymakers aiming to optimize strategic decision-making within this segment.


Product Profile and Therapeutic Landscape

PHENAPHEN W/ CODEINE NO. 4 is classified as a Schedule III controlled substance in many jurisdictions, owing to the inclusion of codeine, an opioid with dependency potential [1]. Its formulation targets patients requiring opioid analgesics combined with acetaminophen, effective in treating pain where non-opioid alternatives are insufficient. The product’s positioning hinges on efficacy, safety profile, and regulatory status, influencing its prescribing trends.

The global analgesic market comprises several categories: non-opioid analgesics, opioids, and adjuvant therapies. With opioid-prescribing patterns under increasing scrutiny due to abuse and dependency issues, the market for codeine-based products faces heightened regulatory and societal challenges. The shift towards multimodal pain management strategies, including non-opioid options, further affects demand.


Market Dynamics: Drivers and Challenges

Drivers

  1. Rising Prevalence of Chronic and Acute Pain:
    Increasing incidence of conditions such as osteoarthritis, postoperative pain, and cancer-related pain sustains demand for analgesics, including PHENAPHEN W/ CODEINE NO. 4. According to the CDC, nearly 50 million adults in the U.S. suffer from chronic pain [2].

  2. Growing Elderly Population:
    Aging demographics globally amplify the need for effective pain management solutions. Elderly patients often require combination analgesics, bolstering sales of formulæ like PHENAPHEN W/ CODEINE NO. 4.

  3. Healthcare Infrastructure and Prescription Practices:
    Expanding healthcare access, especially in emerging markets, supports increased prescription volume. Healthcare provider familiarity with opioid options sustains pre-existing demand, notwithstanding regulatory pressures.

  4. Expanding Regulatory Frameworks and Prescription Monitoring:
    Countries are implementing prescription drug monitoring programs (PDMPs) to curb misuse while ensuring pain relief. These measures influence prescribing behaviors, indirectly impacting sales volumes.

Challenges

  1. Regulatory and Legal Restrictions:
    Governments enforce strict controls on codeine, including dosage limits, scheduling, and mandatory prescriptions. In some countries, classifying PHENAPHEN W/ CODEINE NO. 4 as a controlled substance has led to decreased availability and consumption.

  2. Opioid Epidemic and Public Perception:
    The global opioid crisis has spurred campaigns against opioid prescribing, affecting market perceptions and forcing manufacturers to adapt formulations or marketing strategies [3].

  3. Alternative Analgesic Markets:
    The advent of non-opioid pain medications, such as NSAIDs, anticonvulsants, and antidepressants, offers competition and may reduce reliance on opioid formulations, especially for chronic pain.

  4. Supply Chain and Manufacturing Constraints:
    Stricter manufacturing standards, supply shortages of raw materials, and regulatory compliance costs can hinder production and distribution.


Geographical Market Trajectory

The demand for PHENAPHEN W/ CODEINE NO. 4 varies significantly across regions, influenced by regulatory landscapes, healthcare infrastructure, and cultural attitudes toward opioids.

North America

The U.S. and Canada constitute significant markets, with prescription data indicating steady utilization historically. However, recent regulatory actions, such as rescheduling codeine to Schedule V in some states or outright bans, have impacted sales. The U.S. saw a 25% reduction in opioid prescriptions between 2016 and 2021 [4].

Europe

European markets display heterogeneity; countries like the UK and Germany have tightly regulated opioid controls, leading to restricted access. Nonetheless, multimodal pain management practices have decreased reliance on traditional opioid formulations.

Asia-Pacific

Emerging markets in Asia-Pacific exhibit growth potential due to expanding healthcare access, rising pain-related health issues, and increasing physician awareness. However, strict regulations and cultural stigma around opioids may temper growth.

Latin America and Africa

These regions show burgeoning demand driven by demographic shifts and untreated pain. Nevertheless, challenges include regulatory variability, import/export restrictions, and limited healthcare infrastructure.


Financial Trajectory and Market Forecast

Predicting the financial trajectory of PHENAPHEN W/ CODEINE NO. 4 involves analyzing historical sales data, regulatory environment changes, and evolving market demands.

Current Market Valuation

As of 2022, the global analgesic market was valued at approximately USD 30-35 billion, with prescription opioids accounting for a significant but declining share due to regulatory and societal pressures [5]. Specific revenue figures for PHENAPHEN W/ CODEINE NO. 4 are not publicly disclosed, reflecting its niche positioning compared to broader analgesic categories.

Growth Projections

The analgesic market is projected to grow at a CAGR of 4-5% over the next five years, driven primarily by emerging markets and demographic shifts [6]. However, the opioid segment’s growth may be attenuated due to increasing restrictions.

In developed markets, sales are expected to plateau or decline marginally, with manufacturers pivoting toward abuse-deterrent formulations and combination products with lower misuse potential. In contrast, developing regions may see higher CAGR rates (6-8%), contingent upon regulatory liberalization and increased healthcare access.

Impact of Regulatory Innovations

Regulatory agencies' moves to limit opioid potency and availability—such as the U.S. FDA’s approval of abuse-deterrent formulations—alter the financial outlook. Companies investing in reformulation of PHENAPHEN W/ CODEINE NO. 4 or in alternative therapies could mitigate revenue erosion.

Competitive Landscape

Market players include multinational pharmaceutical companies and generic manufacturers. Patent expirations, generic entry, and pricing adjustments influence profit margins and revenue streams.


Strategic Implications

Investors and manufacturers should monitor regulatory developments closely, especially given the shifting landscape of opioid prescribing. Diversifying product portfolios with non-opioid analgesics and investing in abuse-deterrent formulations can sustain financial gains.

Emerging markets present opportunities; however, navigating complex regulatory environments remains crucial. Tailored strategies—such as localized formulary approvals, partnerships with healthcare providers, and consumer education — will shape the future financial performance.


Key Takeaways

  • Regulatory and societal pressures significantly influence the demand and profitability of PHENAPHEN W/ CODEINE NO. 4, necessitating adaptive strategies.
  • Demographic trends, notably aging populations, support sustained demand, especially in markets with limited opioid alternatives.
  • Growth prospects are robust in emerging regions but tempered in developed markets due to increasing restrictions.
  • Product innovation, particularly abuse-deterrent formulations and combination therapies, is vital to maintaining competitiveness.
  • Market diversification and strategic partnerships should underpin long-term financial resilience amid evolving pain management paradigms.

FAQs

1. How are regulatory changes affecting PHENAPHEN W/ CODEINE NO. 4 markets?
Regulatory shifts, including rescheduling codeine and implementing prescription monitoring programs, have reduced access and prescribed volumes in many jurisdictions, impacting sales revenues.

2. What are the main competitors to PHENAPHEN W/ CODEINE NO. 4?
Other opioid analgesics like hydrocodone and oxycodone formulations, as well as non-opioid pain relievers, compete for the same indication but differ in regulatory status, efficacy, and safety profiles.

3. Is there a risk of obsolescence for codeine-based products?
Yes. Increasing restrictions, public health campaigns, and alternative therapies threaten long-term demand, pushing manufacturers toward reformulation or diversification.

4. Which regions offer the highest growth potential for PHENAPHEN W/ CODEINE NO. 4?
Emerging markets in Asia-Pacific and Latin America present promising growth opportunities due to expanding healthcare infrastructure and demographic trends.

5. How can companies mitigate risks associated with addiction and misuse?
Developing abuse-deterrent formulations, implementing strict prescribing guidelines, and engaging in public health initiatives can help mitigate misuse and regulatory risks.


Sources

[1] U.S. FDA. "Codeine Medications." Accessed 2023.
[2] CDC. "Chronic Pain Facts." 2021.
[3] WHO. "The Global State of the Opioid Crisis." 2022.
[4] National Institute on Drug Abuse. "Nationwide Prescription Trends." 2022.
[5] Grand View Research. "Analgesics Market Size." 2022.
[6] MarketWatch. "Analgesic Market Forecast." 2023.

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