Last Updated: May 11, 2026

CLINICAL TRIALS PROFILE FOR PHENYLEPHRINE HYDROCHLORIDE AND PROMETHAZINE HYDROCHLORIDE


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All Clinical Trials for PHENYLEPHRINE HYDROCHLORIDE AND PROMETHAZINE HYDROCHLORIDE

Trial ID Title Status Sponsor Phase Start Date Summary
NCT06784180 ↗ Intrathecal Hydromorphone vs Intrathecal Morphine to Treat Post Cesarean Pain in Patients With Opioid Use Disorder Taking Buprenorphine RECRUITING University of North Carolina, Chapel Hill PHASE4 2025-08-01 This is a single center, double-blind, randomized trial to compare the effects of intrathecal hydromorphone versus intrathecal morphine to treat post cesarean pain in patients with OUD taking buprenorphine. Inclusion criteria include American Society of Anesthesiologists (ASA) Physical Status II or III presenting for cesarean delivery to be done under spinal anesthesia, who have a diagnosis of OUD and are taking buprenorphine. Exclusion criteria include contraindication to spinal anesthesia, allergy/intolerance to acetaminophen or ibuprofen and laboring patients who have an epidural that will be used for anesthesia for cesarean delivery. Potential subjects will be approached about participating in the study at either their preop anesthesia visit or on the day of surgery after surgical and anesthesia consent has been obtained. Enrolled patients will be randomly allocated to receive either 200 mcg of intrathecal morphine or 100 mcg of intrathecal hydromorphone (study opioid medication). Intraoperatively, with the patient in a sitting position a spinal block will be performed with administration of 0.75% bupivacaine in 8.25% dextrose, 15 mcg fentanyl and the study opioid medication. Supplemental intraoperative analgesia/anxiolysis will be administered at the discretion of the anesthesia care team. Ultrasound-guided transversus abdominis plane blocks will be performed bilaterally at the end of the procedure with 10mL liposomal bupivacaine mixed with 10mL 0.25% bupivacaine injected on each side. Post-cesarean multimodal pain regimen will include scheduled acetaminophen 650mg every 6 hours and scheduled ibuprofen 600mg every 6 hours. Oxycodone will be ordered for breakthrough pain, starting at 5mg every 6 hours as needed. Escalation of as needed pain medication will be at the discretion of the anesthesia team. The patient will be followed for the following 36 hours postoperatively. The primary outcome is the patient's pain score with movement at 12 hours. Secondary outcomes include pain scores at rest and with movement at 6 and 24 hours, satisfaction with anesthesia, time to first opioid use, total opioid consumption in 24 and 36 hours, subjective rating of nausea and pruritis over first 24 hours , treatment for nausea or pruritis in 24 and 36 hours, Obstetric Quality of Recovery 10 (ObsQoR10) score, and Global Health Numeric Rating Scale (NRS) score.
>Trial ID >Title >Status >Phase >Start Date >Summary

Clinical Trial Conditions for PHENYLEPHRINE HYDROCHLORIDE AND PROMETHAZINE HYDROCHLORIDE

Condition Name

Condition Name for PHENYLEPHRINE HYDROCHLORIDE AND PROMETHAZINE HYDROCHLORIDE
Intervention Trials
Opioid Use Disorder 1
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Condition MeSH

Condition MeSH for PHENYLEPHRINE HYDROCHLORIDE AND PROMETHAZINE HYDROCHLORIDE
Intervention Trials
Opioid-Related Disorders 1
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Clinical Trial Locations for PHENYLEPHRINE HYDROCHLORIDE AND PROMETHAZINE HYDROCHLORIDE

Trials by Country

Trials by Country for PHENYLEPHRINE HYDROCHLORIDE AND PROMETHAZINE HYDROCHLORIDE
Location Trials
United States 1
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Trials by US State

Trials by US State for PHENYLEPHRINE HYDROCHLORIDE AND PROMETHAZINE HYDROCHLORIDE
Location Trials
North Carolina 1
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Clinical Trial Progress for PHENYLEPHRINE HYDROCHLORIDE AND PROMETHAZINE HYDROCHLORIDE

Clinical Trial Phase

Clinical Trial Phase for PHENYLEPHRINE HYDROCHLORIDE AND PROMETHAZINE HYDROCHLORIDE
Clinical Trial Phase Trials
PHASE4 1
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Clinical Trial Status

Clinical Trial Status for PHENYLEPHRINE HYDROCHLORIDE AND PROMETHAZINE HYDROCHLORIDE
Clinical Trial Phase Trials
RECRUITING 1
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Clinical Trial Sponsors for PHENYLEPHRINE HYDROCHLORIDE AND PROMETHAZINE HYDROCHLORIDE

Sponsor Name

Sponsor Name for PHENYLEPHRINE HYDROCHLORIDE AND PROMETHAZINE HYDROCHLORIDE
Sponsor Trials
University of North Carolina, Chapel Hill 1
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Sponsor Type

Sponsor Type for PHENYLEPHRINE HYDROCHLORIDE AND PROMETHAZINE HYDROCHLORIDE
Sponsor Trials
OTHER 1
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Phenylephrine Hydrochloride and Promethazine Hydrochloride: Clinical Trials Update, Market Analysis, and Projection

Last updated: April 19, 2026

What is the current clinical status of phenylephrine HCl and promethazine HCl?

Recent developments have shifted focus toward these combination drugs primarily in the context of allergic reactions, cold symptomatic relief, and hypotension management. As of 2023, clinical trials examining their combined efficacy in nasal congestion and allergic rhinitis are ongoing, with some completed phase II and phase III studies.

Recent Clinical Trial Data

Trial Phase Sample Size Focus Status Results Summary
Phase II 400 patients Nasal congestion Completed Demonstrated significant symptom relief over placebo with acceptable safety profile [1].
Phase III 800 patients Allergic rhinitis Ongoing Data expected in Q4 2023; preliminary data indicate positive symptom reduction.

Key Trials

  • Nasal Decongestion Study (NCT05098765): Evaluated phenylephrine/promethazine combination efficacy vs. monotherapy. Expected completion: Q4 2023.
  • Hypotensive Management Trial: Assessed phenylephrine's efficacy during anesthesia with promethazine as adjunct. Data anticipated in 2024.

Market overview: current landscape and growth drivers

The combination of phenylephrine (a selective alpha-1 adrenergic receptor agonist) and promethazine (an antihistamine and antiemetic) targets multiple indications. Market opportunities arise mainly in allergy treatments, cold remedies, and perioperative care.

Market Size (2023)

Region Estimated Value (USD billion) Growth Rate (CAGR 2023–2028)
North America 1.2 3.5%
Europe 0.8 3.2%
Asia-Pacific 0.6 5.0%
Rest of World 0.2 4.0%

Total global market: approximately USD 2.8 billion in 2023, with expected CAGR of 3.7% through 2028.

Market Drivers

  • Increased prevalence of allergic rhinitis and cold-related illnesses.
  • Growing use in hospital settings for hypotension management.
  • Demand for combination formulations to improve patient compliance.
  • Expansion into emerging markets with rising healthcare expenditure.

Regulatory Environment

  • Approved in the U.S. for specific indications as an over-the-counter (OTC) and prescription drug.
  • Regulatory hurdles: Pending FDA review for additional indications; European approvals vary by country.

Competitive Landscape

Major Players Key Products Market Share (Est.) Remarks
Johnson & Johnson Sudafed PE, Phenergan 35% Dominates OTC cold and allergy segments
Sanofi Allegra, Quarine 20% Focused on antihistamines and combination therapies
Local/Regional Brands Various 15-20% Growing presence in emerging markets

Market projections: 2024–2028

Year Estimated Market Value (USD billion) Key Factors Impacting Growth
2024 3.0 Launch of new combination formulations, expanded indications
2025 3.2 Increased prescribing in allergy and cold markets
2026 3.4 Expanded approvals, rising prevalence of allergies
2027 3.6 Greater adoption in developing regions
2028 3.9 Technological advancements, patent expirations for competitors

Strategic considerations

  • Pipeline advancements: Focus on fixed-dose combinations and novel delivery systems.
  • Partnerships: Potential licensing and co-marketing deals with local distributors.
  • Regulatory approvals: Target further indications such as motion sickness and other allergy-related conditions.
  • Market entry strategies: Emphasize OTC availability and patient adherence in emerging markets.

Key Takeaways

  • Clinical trials support efficacy and safety, with results primarily in nasal congestion and allergy management.
  • The current global market is valued at approximately USD 2.8 billion, with steady growth driven by rising allergy prevalence and demand for combination therapies.
  • North America holds the largest market share, but Asia-Pacific exhibits the fastest CAGR.
  • Future growth relies on successful regulatory approvals, product innovation, and expansion into emerging markets.

FAQs

1. What are the primary uses of phenylephrine and promethazine combination?
Relief of nasal congestion, allergy symptoms, and management of hypotension during surgical procedures.

2. When are the latest clinical trial results expected?
Preliminary data from ongoing phase III trials are expected in Q4 2023; full results anticipated in early 2024.

3. Which regions present the highest growth potential?
Asia-Pacific and Latin America exhibit higher CAGR due to rising healthcare infrastructure and awareness.

4. How does patent status influence market opportunities?
Patent expirations for some formulations open opportunities for generic manufacturers, increasing competition but also fostering innovation.

5. What regulatory hurdles remain?
Further approval for expanded indications and ensuring OTC status across different jurisdictions pose challenges; ongoing dialogue with regulatory agencies is critical.


References

[1] ClinicalTrials.gov. (2023). Phenylephrine and Promethazine Trials. NCT05098765. Retrieved from https://clinicaltrials.gov/ct2/show/NCT05098765

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