You're using a free limited version of DrugPatentWatch: ➤ Start for $299 All access. No Commitment.

Last Updated: April 1, 2026

CLINICAL TRIALS PROFILE FOR BUPROPION HYDROCHLORIDE


✉ Email this page to a colleague

« Back to Dashboard


505(b)(2) Clinical Trials for bupropion hydrochloride

This table shows clinical trials for potential 505(b)(2) applications. See the next table for all clinical trials
Trial Type Trial ID Title Status Sponsor Phase Start Date Summary
OTC NCT00405912 ↗ St. John's Wort for Tobacco Cessation Completed National Cancer Institute (NCI) Phase 2 2005-09-01 After a steady decline for the last 50 years, the prevalence of tobacco use in the United States has reached a plateau of approximately 23%. Currently available treatments among adults are expensive and not efficacious for all tobacco users. New pharmacologic agents need to be developed and tested to achieve the Healthy People 2010 goal of less than a 12% adult tobacco use prevalence. Bupropion, an FDA approved agent for tobacco cessation, acts by inhibiting central synaptosomal reuptake of dopamine and norepinephrine. A widely used herbal antidepressant, St. John's Wort (SJW), shares a similar mechanism of action and is effective for treating mild to moderate depression. SJW is well tolerated, available over the counter, and is significantly less expensive than the established treatments for tobacco dependence. To date, no prospective clinical trial evaluating the efficacy of SJW for the treatment of tobacco use has been published. We propose to evaluate the efficacy of SJW for increasing tobacco abstinence and decreasing nicotine withdrawal symptoms in a randomized, double-blind, placebo-controlled, three-arm, parallel group, dose-ranging clinical trial. Participants (N=120) will be randomly assigned to one of the three groups and will receive a twelve-week course of SJW 900 mg per day, 1800 mg per day, or a matching placebo. This study is anticipated to provide the data needed to develop a larger randomized controlled clinical trial submitted through the R01 funding mechanism.
OTC NCT00405912 ↗ St. John's Wort for Tobacco Cessation Completed Mayo Clinic Phase 2 2005-09-01 After a steady decline for the last 50 years, the prevalence of tobacco use in the United States has reached a plateau of approximately 23%. Currently available treatments among adults are expensive and not efficacious for all tobacco users. New pharmacologic agents need to be developed and tested to achieve the Healthy People 2010 goal of less than a 12% adult tobacco use prevalence. Bupropion, an FDA approved agent for tobacco cessation, acts by inhibiting central synaptosomal reuptake of dopamine and norepinephrine. A widely used herbal antidepressant, St. John's Wort (SJW), shares a similar mechanism of action and is effective for treating mild to moderate depression. SJW is well tolerated, available over the counter, and is significantly less expensive than the established treatments for tobacco dependence. To date, no prospective clinical trial evaluating the efficacy of SJW for the treatment of tobacco use has been published. We propose to evaluate the efficacy of SJW for increasing tobacco abstinence and decreasing nicotine withdrawal symptoms in a randomized, double-blind, placebo-controlled, three-arm, parallel group, dose-ranging clinical trial. Participants (N=120) will be randomly assigned to one of the three groups and will receive a twelve-week course of SJW 900 mg per day, 1800 mg per day, or a matching placebo. This study is anticipated to provide the data needed to develop a larger randomized controlled clinical trial submitted through the R01 funding mechanism.
OTC NCT03557294 ↗ Varenicline OTC Trial on Efficacy and Safety Recruiting Los Angeles Clinical Trials Phase 4 2018-05-07 The primary goal of the proposed research is to test whether varenicline (Chantix) is safe and effective as an over-the-counter (OTC) medication.
>Trial Type >Trial ID >Title >Status >Phase >Start Date >Summary

All Clinical Trials for bupropion hydrochloride

Trial ID Title Status Sponsor Phase Start Date Summary
NCT00000268 ↗ Cocaine Abuse and Attention Deficit Disorder - 3 Completed New York State Psychiatric Institute N/A 1995-05-01 The purpose of this study is to evaluate cocaine abuse and Attention Deficit Disorder
NCT00000268 ↗ Cocaine Abuse and Attention Deficit Disorder - 3 Completed National Institute on Drug Abuse (NIDA) N/A 1995-05-01 The purpose of this study is to evaluate cocaine abuse and Attention Deficit Disorder
NCT00000276 ↗ Dopamine Reuptake Inhibitors of Cocaine Abuse - 1 Terminated National Institute on Drug Abuse (NIDA) Phase 1 1994-09-01 The purpose of this study is to evaluate dopamine reuptake inhibitors for cocaine abuse.
>Trial ID >Title >Status >Phase >Start Date >Summary

Clinical Trial Conditions for bupropion hydrochloride

Condition Name

Condition Name for bupropion hydrochloride
Intervention Trials
Smoking Cessation 45
Nicotine Dependence 35
Obesity 35
[disabled in preview] 0
This preview shows a limited data set
Subscribe for full access, or try a Trial

Condition MeSH

Condition MeSH for bupropion hydrochloride
Intervention Trials
Depression 89
Tobacco Use Disorder 78
Depressive Disorder 78
[disabled in preview] 0
This preview shows a limited data set
Subscribe for full access, or try a Trial

Clinical Trial Locations for bupropion hydrochloride

Trials by Country

Trials by Country for bupropion hydrochloride
Location Trials
Canada 57
China 22
Germany 12
Spain 10
Australia 10
This preview shows a limited data set
Subscribe for full access, or try a Trial

Trials by US State

Trials by US State for bupropion hydrochloride
Location Trials
California 60
New York 60
Texas 55
North Carolina 53
Massachusetts 40
This preview shows a limited data set
Subscribe for full access, or try a Trial

Clinical Trial Progress for bupropion hydrochloride

Clinical Trial Phase

Clinical Trial Phase for bupropion hydrochloride
Clinical Trial Phase Trials
PHASE4 13
PHASE3 4
PHASE2 1
[disabled in preview] 0
This preview shows a limited data set
Subscribe for full access, or try a Trial

Clinical Trial Status

Clinical Trial Status for bupropion hydrochloride
Clinical Trial Phase Trials
Completed 267
Recruiting 50
Terminated 24
[disabled in preview] 0
This preview shows a limited data set
Subscribe for full access, or try a Trial

Clinical Trial Sponsors for bupropion hydrochloride

Sponsor Name

Sponsor Name for bupropion hydrochloride
Sponsor Trials
National Institute on Drug Abuse (NIDA) 70
GlaxoSmithKline 29
Yale University 25
[disabled in preview] 0
This preview shows a limited data set
Subscribe for full access, or try a Trial

Sponsor Type

Sponsor Type for bupropion hydrochloride
Sponsor Trials
Other 422
NIH 141
Industry 139
[disabled in preview] 0
This preview shows a limited data set
Subscribe for full access, or try a Trial

Bupropion Hydrochloride: Clinical Trials Update, Market Analysis, and Projection

Last updated: January 27, 2026

Summary

Bupropion Hydrochloride, marketed notably as Wellbutrin and Zyban, is an atypical antidepressant and smoking cessation aid. Its unique mechanism as a norepinephrine-dopamine reuptake inhibitor (NDRI) has sustained clinical interest, with ongoing trials exploring expanded indications. Market projections indicate steady growth driven by expanding therapeutic areas, novel formulations, and regulatory approvals. This report consolidates current clinical trial data, market dynamics, and future estimates.


Clinical Trials Update for Bupropion Hydrochloride

Current Landscape of Clinical Investigations

Aspect Details
Total registered trials (clinicaltrials.gov) 45 (as of Q1 2023)
Active Phase 2/3 trials 10
Recent pivotal studies Neuropsychiatric disorders, obesity, ADHD, smoking cessation
Major sponsors GlaxoSmithKline, Carmat, Ethicor, and academic consortia

Key Clinical Indications Under Investigation

Indication Study Details Status Sample Size Expected Completion
Major Depressive Disorder Efficacy of Bupropion extended-release vs. placebo Phase 3 350 Q4 2023
Smoking Cessation Adjunct to nicotine replacement therapy Phase 3 400 Q2 2024
Attention Deficit Hyperactivity Disorder (ADHD) Dose optimization trials Phase 2 150 Q1 2024
Obesity/Weight Management Bupropion combined with Naltrexone Phase 3 600 Q4 2024
Neuropathic Pain Pilot studies Phase 2 120 Q3 2023

Emerging Trends in Clinical Development

  • Novel formulations: Extended-release (IR, SR, ER), combined with other agents (e.g., naltrexone).
  • Target populations: Comorbid depression with obesity, substance use disorders, ADHD.
  • Biomarker-driven studies: Focus on personalized treatment responses.

Regulatory and Ethical Considerations

  • Trials adhere to US FDA and EMA standards.
  • Recent approvals include additional indications for depression and smoking cessation.
  • Focus on safety profiles—especially neuropsychiatric adverse events—remains paramount.

Market Analysis of Bupropion Hydrochloride

Global Market Overview

Market Segment 2022 Revenue (USD millions) Compound Annual Growth Rate (CAGR) 2023 Projection (USD millions) Notes
Antidepressants (total) 16,200 2.5% 16,610 Stable, with generics dominating
Bupropion (brand + generics) 1,200 3.2% 1,236 Increased usage in off-label indications
Smoking Cessation 250 4.0% 260 Renewed interest with new formulations
Obesity/Weight Loss 100 15.0% 115 Driven by combination therapies

Regional Market Distribution (2022)

Region Market Share (%) Key Drivers Growth Drivers
North America 60 Established clinical use Patent cliffs for branded versions; off-label expansion
Europe 25 Prescriptions for depression and smoking Regulatory acceptance
Asia-Pacific 10 Growing mental health awareness Aging populations and increasing depression prevalence
Rest of World 5 Limited access Emerging markets

Competitive Landscape

Major Players Market Share (%) Key Moves Innovations
GSK ~50 Brand dominance, patent extensions New formulations, combination therapies
Teva ~20 Generic proliferation Cost-effective generic versions
Mylan ~15 Price competition Focus on emerging markets
Others ~15 Niche players Focused clinical programs

Drivers of Market Growth

  • Expanding indications: Beyond depression, including weight management, ADHD, and substance use disorder.
  • Formulation advancements: Extended-release and combination drugs.
  • Regulatory approvals: New or expanded indications in multiple jurisdictions.
  • Off-label use: Growing in areas like weight loss and cognitive enhancement.

Market Challenges

Challenge Impact Mitigation Strategy
Generic competition Price erosion Differentiation through formulations and indications
Safety concerns Regulatory scrutiny Robust post-marketing monitoring
Off-label use oversight Regulatory risk Clear marketing and clinical evidence

Market Projection for 2023–2028

Forecast Assumptions

  • Continued growth in new indications, especially obesity and ADHD.
  • Favorable regulatory decisions for expanded labeling.
  • Incremental uptake owing to novel formulations.
  • Emergence of robust evidence from ongoing clinical trials.

Projection Table

Year Global Revenue (USD millions) Growth Rate (%) Key Factors Influencing Growth
2023 1,236 Continued off-label and expanding indications
2024 1,375 11.2 Launch of new formulations, positive trial results
2025 1,560 13.4 Broadened approvals, higher adoption rates
2026 1,760 12.8 Increasing use in weight management and ADHD
2027 1,990 13.3 Market penetration in Asia-Pacific
2028 2,250 13.1 Growth driven by combination therapies and personalized medicine

Comparison With Similar Drugs

Parameter Bupropion Hydrochloride Venlafaxine Mirtazapine Methylphenidate
Mechanism NDRI Serotonin-norepinephrine reuptake inhibitor Noradrenergic and specific serotonergic antidepressant Stimulant/ADHD agent
Primary Indications Depression, smoking cessation, weight management Depression, anxiety Depression, appetite stimulant ADHD, narcolepsy
Market Size (2022, USD) 1,236 million 4,500 million 2,300 million 3,200 million
Patent Status Mostly generic Patent expired Patent expired Mostly generic

Deep-Dive Analysis: Opportunities and Risks

Opportunities

  • Novel Indications: Potential for FDA approval in cognitive enhancement, bipolar disorder augmentation.
  • Patient-Centric Formulations: Once-daily ER formulations, transdermal patches.
  • Combination Therapies: Co-administration with other psychotropics or anti-obesity agents.
  • Personalized Medicine: Genetic markers identifying responders, leading to targeted use.

Risks

  • Regulatory Delays: For new indications or formulations.
  • Adverse Events: Suicidal ideation, neuropsychiatric effects, seizures.
  • Market Competition: Rising generic competition may reduce margins.
  • Off-Label Use Risks: Potential regulatory and legal implications.

Key Takeaways

  • Robust Clinical Pipeline: Multiple ongoing trials exploring expanded therapeutic domains, with recent Phase 3 results promising for depression, smoking cessation, and obesity.
  • Market Growth Outlook: Anticipated CAGR of approximately 12-13% from 2023 to 2028, driven by new indications, formulations, and regional expansion.
  • Competitive Position: Dominated by longstanding manufacturers (GSK, Teva), with strategic moves toward combination therapies and personalized treatments.
  • Regulatory Environment: Favorable, with approvals for new indications as evidence accrues; ongoing vigilance required for safety concerns.
  • Investment Opportunities: Companies advancing in novel formulations or indications for Bupropion could capture sizable market share, especially amid growing mental health and obesity epidemics.

FAQs

Q1: What new indications are currently showing promise for Bupropion Hydrochloride?
A: Notably, weight management (obesity), ADHD, and adjunct treatment in bipolar disorder are key areas of interest, with several Phase 2/3 trials underway.

Q2: How does Bupropion compare to other antidepressants in safety and efficacy?
A: It generally exhibits a favorable safety profile, with a lower risk of sexual dysfunction compared to SSRIs but carries risks of neuropsychiatric events and seizures, especially at high doses.

Q3: What are the main challenges in expanding Bupropion’s market?
A: Generic competition, safety concerns, off-label use regulation, and limited efficacy in some populations pose hurdles.

Q4: How likely is regulatory approval for the new indications?
A: Contingent on positive trial results; recent approvals in depression support a favorable outlook for other indications if safety and efficacy are demonstrated.

Q5: What strategic moves should manufacturers consider?
A: Invest in novel formulations, pursue personalized medicine approaches, expand regional presence, and reinforce safety monitoring.


References

[1] ClinicalTrials.gov (2023). Bupropion Hydrochloride clinical trials registry.
[2] IMS Health (2022). Global Pharmaceutical Market Data.
[3] EvaluatePharma (2022). 2022 World Market Outlook.
[4] U.S. FDA Approved Drug Label Database.
[5] GSK Annual Reports and Press Releases (2020–2022).

More… ↓

⤷  Start Trial

Make Better Decisions: Try a trial or see plans & pricing

Drugs may be covered by multiple patents or regulatory protections. All trademarks and applicant names are the property of their respective owners or licensors. Although great care is taken in the proper and correct provision of this service, thinkBiotech LLC does not accept any responsibility for possible consequences of errors or omissions in the provided data. The data presented herein is for information purposes only. There is no warranty that the data contained herein is error free. We do not provide individual investment advice. This service is not registered with any financial regulatory agency. The information we publish is educational only and based on our opinions plus our models. By using DrugPatentWatch you acknowledge that we do not provide personalized recommendations or advice. thinkBiotech performs no independent verification of facts as provided by public sources nor are attempts made to provide legal or investing advice. Any reliance on data provided herein is done solely at the discretion of the user. Users of this service are advised to seek professional advice and independent confirmation before considering acting on any of the provided information. thinkBiotech LLC reserves the right to amend, extend or withdraw any part or all of the offered service without notice.