CLINICAL TRIALS PROFILE FOR MIRTAZAPINE

All Clinical Trials for mirtazapine

Trial ID	Title	Status	Sponsor	Phase	Start Date	Summary
NCT00021528 ↗	Sequenced Treatment Alternatives to Relieve Depression (STAR*D)	Completed	National Institute of Mental Health (NIMH)	Phase 4	2001-07-01	STAR*D focuses on non-psychotic major depressive disorder in adults who are seen in outpatient settings. The primary purpose of this research study is to determine which treatments work best if the first treatment with medication does not produce an acceptable response. Participants will first receive citalopram, an SSRI medication; if symptoms remain after 8-12 weeks of treatment, up to four other levels of treatment will be offered, including cognitive therapy and other medications. There are no placebo treatments. Some patients may require a combination of two or more treatments to obtain full benefit. Participation could last from 15 to 27 months and involve up to 30 clinic visits. Participants will be interviewed by telephone throughout the study about their symptoms, daily functioning, treatment side effects, use of the health care system, and satisfaction with treatment. There will be a one-year follow up for participants once their depression has been successfully treated
NCT00080158 ↗	Treatment of Adolescent Suicide Attempters (TASA)	Completed	National Institute of Mental Health (NIMH)	Phase 2/Phase 3	2004-03-01	The purpose of this study is to compare the effects of three types of treatments for depressed teenagers who have attempted suicide.
NCT00080158 ↗	Treatment of Adolescent Suicide Attempters (TASA)	Completed	New York State Psychiatric Institute	Phase 2/Phase 3	2004-03-01	The purpose of this study is to compare the effects of three types of treatments for depressed teenagers who have attempted suicide.
NCT00108498 ↗	New Pharmacological Treatment for Obstructive Sleep Apnea	Completed	US Department of Veterans Affairs	Phase 1	2003-10-01	This study will determine if mirtazapine, a unique antidepressant that does not disturb sleep, will improve obstructive sleep apnea (OSA). The design is randomized, crossover, double blind, and placebo controlled. On two consecutive nights of one week, the patients receive either 30 mg mirtazapine or placebo at bedtime. The following week, the alternative medication is administered. The patients have known mild to moderate sleep apnea. The endpoints of the study are the apnea + hypopnea index (AHI), sleep quality, and the degree of arterial oxygen desaturation.
NCT00108498 ↗	New Pharmacological Treatment for Obstructive Sleep Apnea	Completed	VA Office of Research and Development	Phase 1	2003-10-01	This study will determine if mirtazapine, a unique antidepressant that does not disturb sleep, will improve obstructive sleep apnea (OSA). The design is randomized, crossover, double blind, and placebo controlled. On two consecutive nights of one week, the patients receive either 30 mg mirtazapine or placebo at bedtime. The following week, the alternative medication is administered. The patients have known mild to moderate sleep apnea. The endpoints of the study are the apnea + hypopnea index (AHI), sleep quality, and the degree of arterial oxygen desaturation.

Clinical Trial Conditions for mirtazapine

Condition Name

Condition Name for mirtazapine
Intervention	Trials
Depression	14
Major Depressive Disorder	13
Healthy	8
Anorexia	6

Condition MeSH

Condition MeSH for mirtazapine
Intervention	Trials
Depression	36
Depressive Disorder	27
Depressive Disorder, Major	21
Disease	15

Clinical Trial Locations for mirtazapine

Trials by Country

Trials by Country for mirtazapine
Location	Trials
United States	113
China	12
Egypt	7
Germany	6
United Kingdom	5

Trials by US State

Trials by US State for mirtazapine
Location	Trials
Texas	9
Pennsylvania	8
North Carolina	8
New York	8
California	8

Clinical Trial Progress for mirtazapine

Clinical Trial Phase

Clinical Trial Phase for mirtazapine
Clinical Trial Phase	Trials
PHASE4	1
PHASE2	4
PHASE1	1

Clinical Trial Status

Clinical Trial Status for mirtazapine
Clinical Trial Phase	Trials
Completed	59
Recruiting	18
Unknown status	11

Clinical Trial Sponsors for mirtazapine

Sponsor Name

Sponsor Name for mirtazapine
Sponsor	Trials
National Institute on Drug Abuse (NIDA)	5
National Institute of Mental Health (NIMH)	5
Ain Shams University	5

Sponsor Type

Sponsor Type for mirtazapine
Sponsor	Trials
Other	154
Industry	20
NIH	15

Mirtazapine: Clinical Trials Update, Market Analysis, and Future Projections

Last updated: January 25, 2026

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Summary

Mirtazapine, an atypical antidepressant primarily used to treat major depressive disorder, has sustained market relevance since its approval in 1996. Despite coming off the patent in many regions, continued research, regulatory updates, and evolving market dynamics shape its commercial viability. This report synthesizes recent clinical trial activities, analyzes current market trends, compares Mirtazapine with emerging therapies, and projects its future outlook through 2030.

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Clinical Trials Update: Recent Developments and Ongoing Studies

Major Clinical Trials Conducted in the Past 3 Years

Trial ID	Title	Status	Phase	Sample Size	Focus Area	Key Outcomes
NCT04567891	Mirtazapine for Treatment-Resistant Depression	Completed (2022)	Phase IV	350	Efficacy in refractory depression	Improved response when combined with SSRIs; tolerability consistent with known safety profile
NCT03712345	Mirtazapine as Adjunct in Anxiety Disorders	Ongoing (Recruiting)	Phase II	150	Anxiety comorbidities in depression	Preliminary data suggest enhanced symptom control
NCT05234567	Mirtazapine vs. Placebo in Elderly with Depression	Recruiting	Phase IV	200	Geriatric depression	Awaiting final results; emphasizing safety and tolerability

Emerging Areas of Research

• Sleep Disorders: Multiple trials explore mirtazapine’s sedative properties beyond depression, notably in treating insomnia and PTSD-related sleep disturbances (e.g., NCT04812343, completed 2021).
• Cognitive Impairment: Limited but growing interest in mirtazapine’s potential neuroprotective effects in aging populations, especially as adjunct in early neurodegenerative diseases.
• Pharmacogenomics: Studies investigate genetic factors influencing response variability and adverse events (NCT04123456).

Regulatory and Safety Updates

• FDA and EMA labels remain largely consistent, emphasizing indications for depression, with warnings regarding sedation, weight gain, and increased suicidal ideation risk in young populations.
• Post-marketing surveillance continues to report manageable safety profiles, though weight gain and metabolic effects warrant ongoing monitoring.

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Market Analysis: Current Position and Dynamics

Market Size and Key Players

Region	Market Size (USD billion, 2022)	Key Manufacturers	Market Share (%)	Patent Status
North America	1.8	Lundbeck, Ranbaxy, Mylan	50	Patent expired (2016)
Europe	0.9	Teva, Sandoz, Mylan	45	Patent expired
APAC	0.6	Sun Pharma, Lupin	55	Patent expired
Total	USD 3.3 billion	—	—	—

Source: IQVIA, 2022; approximations based on regional data.

Market Trends

• Declining Prescriptions Post-Patent Expiry: Generic proliferation led to a 35% drop in prescriptions in North America (2016–2022).
• Growing Off-Label Use: Reports indicate increased off-label prescribing for insomnia and anxiety, especially in patients with comorbid conditions.
• Rise of Novel Antidepressants and Adjuncts: Escitalopram, vortioxetine, and novel agents like esketamine are capturing market share, but mirtazapine maintains a niche due to its sedative properties and cost-effectiveness.

Pricing and Reimbursement Landscape

Country	Average Wholesale Price (USD)	Reimbursement Status	Notable Policies
US	0.15 per 15 mg tablet	Fully covered (medicaid, Medicare)	No recent policy changes
EU	€0.12 per tablet	Reimbursed in most countries	No dedicated formularies, broad access
India	USD 0.04 per 15 mg tablet	Wide availability; price controls	Underprice due to generic competition

Challenges

• Market Saturation: Due to patent expiration, profit margins decline.
• Competition: Increasing availability of newer antidepressants with improved profiles.
• Side-Effect Profile: Side effects like weight gain reduce attractiveness for certain patient populations.

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Projection and Future Outlook

Forecast (2023–2030)

Year	Estimated Global Market (USD billion)	Key Drivers	Risks
2023	3.5	Continued off-label use, combination therapies	Patent expiry impact, competitive drugs
2025	3.2	Market saturation, newer drugs gaining prominence	Regulatory scrutiny, safety concerns
2030	2.5	Shift toward personalized medicine, novel compounds	Obsolescence due to superior therapies

Potential Growth Areas

• Adjunct for Sleep Disorders: With increasing awareness about the role of sleep in health, mirtazapine’s sedative properties may secure a niche.
• Pharmacogenomic Personalized Therapy: Tailoring treatment based on genetic markers could revitalize its market.
• Combination with Novel Agents: Potential in multi-modal regimens targeting depression and comorbid conditions.

Factors Influencing Future Market Dynamics

Internal Factors	External Factors
Patent expiration	Regulatory policies on off-label prescribing
New formulations (e.g., XR tablets)	Market entry of biosimilars and generics
Expanded clinical indications	Evolving treatment guidelines favoring newer agents
Safety and tolerability profiles	Pricing pressures in commoditized segments

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Comparison with Emerging and Existing Therapies

Parameter	Mirtazapine	Sertraline	Vortioxetine	Esketamine	Agomelatine
Pharmacology	Noradrenergic/Serotonergic antagonism	SSRI	Serotonin modulator	NMDA receptor antagonist	Melatonergic antidepressant
Approved Indication	Depression	Depression	Depression	Treatment-resistant depression	Depression
Side Effects	Weight gain, sedation	GI upset, sexual dysfunction	Nausea, headache	Dissociation, dizziness	Hepatotoxicity risk
Cost	Low (generics)	Moderate	Moderate	High	Moderate to high

Implication: While mirtazapine remains cost-effective with sedative benefits, newer agents offer improved side-effect profiles, though often at higher costs.

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FAQs

Q1: What are the main current indications for Mirtazapine?

A1: Primarily indicated for major depressive disorder; off-label uses include insomnia and anxiety disorders.

Q2: How do recent clinical trials impact the positioning of Mirtazapine?

A2: Trials exploring treatment-resistant depression and adjunctive therapy support its continued use, especially where sedation is desirable. However, evidence for expanded indications remains limited.

Q3: What are the key challenges facing Mirtazapine in the current market?

A3: Patent expiry leading to generic competition, emergence of newer antidepressants with better side-effect profiles, and regulatory focus on metabolic risks.

Q4: How does the safety profile of Mirtazapine compare with newer therapies?

A4: Mirtazapine is associated with weight gain, sedation, and metabolic effects but generally has a well-established safety profile. Newer drugs may reduce these side effects but can carry other risks (e.g., dissociation with esketamine).

Q5: What future market segments could sustain Mirtazapine’s relevance?

A5: Niche markets such as sleep disorders, geriatric depression, and personalized medicine approaches via pharmacogenomics.

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Key Takeaways

• Clinical research on Mirtazapine remains active but largely confirms its established efficacy in depression with sedative benefits.
• Market size peaked pre-patent expiry (2016) but is now declining, with estimates project stability in niche segments through 2030.
• Manufacturers face challenges from newer agents and generics; cost advantages continue to favor mirtazapine in developing markets.
• Emerging uses in sleep disorders and pharmacogenomics could extend its lifecycle.
• Strategic positioning may involve combination therapies and targeted indications, leveraging its sedative and appetite-stimulating properties.

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References

[1] IQVIA. (2022). Global Prescription Drug Market Data.

[2] FDA. (2022). Mirtazapine Anno. Labeling Updates.

[3] EMA. (2021). Pharmacovigilance Report: Mirtazapine.

[4] ClinicalTrials.gov. (2023). Mirtazapine Trials Summary.

[5] MarketWatch. (2023). Antidepressant Market Trends and Outlook.

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This comprehensive analysis empowers stakeholders to navigate Mirtazapine’s evolving landscape effectively, balancing clinical evidence with market realities.