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Last Updated: December 12, 2025

PHERAZINE DM Drug Patent Profile


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

Pherazine Dm is a drug marketed by Halsey and is included in one NDA.

The generic ingredient in PHERAZINE DM is dextromethorphan hydrobromide; promethazine hydrochloride. There are twenty-three drug master file entries for this compound. Fourteen suppliers are listed for this compound. Additional details are available on the dextromethorphan hydrobromide; promethazine hydrochloride profile page.

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Summary for PHERAZINE DM
US Patents:0
Applicants:1
NDAs:1
DailyMed Link:PHERAZINE DM at DailyMed
Drug patent expirations by year for PHERAZINE DM

US Patents and Regulatory Information for PHERAZINE DM

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Exclusivity Expiration
Halsey PHERAZINE DM dextromethorphan hydrobromide; promethazine hydrochloride SYRUP;ORAL 088913-001 Mar 2, 1987 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

Market Dynamics and Financial Trajectory for PHERAZINE DM

Last updated: August 9, 2025

Introduction

PHERAZINE DM, a combination pharmaceutical product primarily used for the treatment of nausea, vomiting, and certain psychotic disorders, has experienced evolving market dynamics driven by regulatory shifts, competitive landscape, and emerging therapeutic needs. This analysis explores its current positioning, market drivers, financial trajectory, and future outlook within the context of broader pharmaceutical industry trends.

Product Overview

PHERAZINE DM combines promethazine and dextromethorphan, leveraging their combined antiemetic and cough suppressant properties. Promethazine, a first-generation antihistamine, inhibits vestibular mechanisms associated with motion sickness, whereas dextromethorphan acts on the cough reflex pathway. The formulation is prescribed for nausea, allergic reactions, and cough suppression, among other indications.

Regulatory Landscape and Market Entry

Originally approved in the mid-20th century, PHERAZINE DM has established a longstanding presence in the OTC and prescription markets. Regulatory agencies such as the U.S. Food and Drug Administration (FDA) have closely monitored its safety profile, especially concerning promethazine’s risk of respiratory depression and sedation. Recent regulatory updates emphasize black box warnings and stricter prescribing guidelines, influencing market access and physician prescribing behaviors.

Market Drivers

1. Growing Prevalence of Nausea and Vomiting Indications

The global rise in chemotherapy-induced nausea, postoperative nausea, and motion sickness cases sustains demand for antiemetics. The increasing prevalence of chronic respiratory conditions also bolsters the market for cough suppressants like dextromethorphan. The aging global population further amplifies these trends, as geriatric patients often suffer from multiple comorbidities necessitating antiemetic therapy.

2. Off-Label and Combination Therapy Expansion

Clinicians often prescribe PHERAZINE DM off-label for complex gastrointestinal and psychiatric conditions, embedding it deeper into treatment protocols. The combination’s convenience further enhances patient adherence, especially in outpatient settings.

3. Regulatory Developments and Control Measures

Stricter oversight over promethazine’s usage reduces misuse and adverse events, impacting supply and prompting formulary adjustments. These regulatory controls may fragment the market, reducing accessible supply but potentially increasing the value of approved, safer formulations.

4. Competitive Landscape

While generic versions of promethazine are widely available, brand-name formulations like PHERAZINE DM retain premium positioning due to perceived efficacy, safety profiles, and prescriber loyalty. Innovative formulations with improved safety features or alternative agents pose threats, influencing revenue stability.

5. Evolving Pharmaceutical Marketing and Patient Preferences

The shift towards targeted, personalized medicine influences prescribing behavior. Patients’ increasing preference for OTC options and home-based therapy options contribute to the product’s sales dynamics. Digital marketing and telehealth expansion also facilitate direct-to-patient communication and prescription.

Financial Trajectory and Market Performance

Historical Perspective

Historically, PHERAZINE DM maintained steady revenue streams, driven by its longstanding market presence and widespread clinician familiarity. However, recent years indicate a plateauing trend, influenced by emerging alternatives and regulatory constraints. Sales metrics in mature markets like the US exhibited modest growth, followed by stabilization.

Current Market Valuation

The global antiemetic drugs market, estimated at USD 4.3 billion in 2022, is projected to grow at a compound annual growth rate (CAGR) of 3.7% through 2030. Within this landscape, PHERAZINE DM accounts for a significant, though declining, segment due to patent expirations and competition.

Forecasting and Revenue Projections

Given regulatory pressures and increasing safety concerns, revenue projections suggest a moderate decline in developed markets—estimated at a 2-4% annual decrease over the next five years. Conversely, emerging markets present opportunities for growth, with predicted CAGR reaching 5%, driven by improving healthcare infrastructure, increased disease prevalence, and expanding pharmaceutical distribution channels.

Impact of Patent and Formulation Developments

Patent expirations in key regions like the US (notably for promethazine formulations) lower barriers for generic manufacturers, intensifying price competition. Companies investing in reformulations or combination therapies with improved safety profiles could influence future revenue trajectories.

Investment and R&D Trends

Pharmaceutical firms are channeling R&D funds toward safer antiemetic drugs, including serotonin receptor antagonists and cannabinoids, impacting the long-term outlook for PHERAZINE DM. Nonetheless, ongoing manufacturing optimizations and targeted marketing sustain its relevance in certain niches.

Future Outlook and Strategic Considerations

Market Expansion in Emerging Economies

Expanding access to healthcare, increasing disposable incomes, and the rise of OTC sales bolster prospects in Asia-Pacific, Latin America, and Africa. Local formulary inclusion and government procurement policies will be decisive in shaping future sales.

Innovation and Reformulation Opportunities

Developing formulations with reduced sedative effects, or combining PHERAZINE DM with novel agents, could reclaim market share. Additionally, leveraging digital health tools to guide prescribing patterns enhances commercialization potential.

Regulatory and Safety Challenges

Ongoing safety concerns, notably promethazine’s risk profile, necessitate vigilant post-market surveillance and may lead to further restrictions or label modifications. Adapting to these challenges is vital to maintaining market access.

Impact of Market Competition

Emerging antiemetic agents, such as NK1 receptor antagonists and newer nausea management protocols, threaten to erode the traditional segment occupied by PHERAZINE DM. Competitive differentiation hinges on safety, cost, and prescriber familiarity.

Key Takeaways

  • Stable But Evolving Market: PHERAZINE DM maintains a significant presence driven by chronic nausea and cough indications but faces declining revenue in mature markets due to safety concerns and competition.
  • Regional Opportunities: Emerging markets offer growth potential, supported by expanding healthcare infrastructure and rising disease burdens.
  • Regulatory Influence: Stricter guidelines impact supply chains and prescribing, necessitating adaptive strategies for manufacturers.
  • Innovation as a Driver: Reformulations and safer alternatives are critical to sustain commercial relevance amid the shift toward newer therapies.
  • Strategic Focus: Companies should emphasize regional expansion, safety profile enhancement, digital engagement, and proactive regulatory compliance to optimize financial trajectories.

FAQs

1. What factors are impacting PHERAZINE DM’s market share?
Safety concerns associated with promethazine’s sedative and respiratory depression risks, growing competition from newer antiemetics, and regulatory restrictions are primary factors diminishing its market share.

2. How are emerging markets influencing the sales of PHERAZINE DM?
Increased healthcare access, affordability, and product availability foster growth in emerging economies, where the product’s established efficacy and low-cost appeal remain attractive.

3. What are the regulatory challenges faced by PHERAZINE DM?
Stringent black box warnings, prescribing limitations, and increasing post-market surveillance requirements challenge its marketability, especially in regions prioritizing drug safety.

4. Are there new formulations of PHERAZINE DM under development?
While some companies explore reformulations with improved safety profiles, extensive development remains limited given the competitive landscape and regulatory hurdles.

5. What future trends could influence the financial trajectory of PHERAZINE DM?
Innovations in antiemetic therapy, regulatory reforms, and digital health integration are pivotal trends that could either sustain its relevance or accelerate decline.


Sources:

[1] Grand View Research. Anti-emetics Market Size & Trends, 2022-2030.
[2] FDA. Black Box Warnings and Safety Updates on Promethazine, 2021.
[3] IQVIA. Global Pharmaceutical Market Reports, 2022.
[4] Statista. Healthcare and Pharmaceutical Trends in Emerging Markets, 2023.
[5] Business Insider. Market Competition and Anti-nausea Drug Innovations, 2023.

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