Advances in antidepressant pharmacotherapy: phase 3 evidence and clinical perspectives.
Alessandro Cuomo, Mario Pinzi, Andrea Fagiolini
Expert Opinion on Pharmacotherapy February 1, 2026 DOI: 10.1080/14656566.2026.2634195 (opens in new tab)
Study at a glance
AI-extracted from the abstract| Characteristics | Review Peer reviewed |
|---|---|
| Interventions | brexanolone intranasal esketamine dextromethorphan - bupropion vortioxetine glucagon-like peptide-1 receptor agonists |
| Topics | Depression Esketamine |
| Keywords | Antidepressants Clinical perspectives Recent advances |
| Key findings | Newer antidepressants beyond traditional monoaminergic agents show promise in phase 3 trials for diverse depressive conditions, but guideline integration and long-term data remain limited. |
Abstract
Major depressive disorder (MDD) remains a leading global cause of disability, with substantial clinical and societal burden. Despite the wide availability of antidepressants, many patients experience inadequate response, partial remission, or treatment-resistant depression. Emerging pharmacological options beyond traditional monoaminergic agents have shown promise in phase 3 clinical trials, yet their integration into treatment algorithms remains limited. This review summarizes current challenges in antidepressant therapy and examines phase 3 clinical evidence for newer agents across diverse depressive conditions, including postpartum depression, acute suicidal ideation, and treatment-resistant MDD. Data on efficacy, safety, and relapse prevention from pivotal trials of brexanolone, intranasal esketamine, dextromethorphan - bupropion, vortioxetine, and metabolism-based interventions such as glucagon-like peptide-1 receptor agonists (GLP-1 RAs) are discussed. The positioning of these treatments within international clinical guidelines is also examined, highlighting inconsistencies and the lack of formal recommendations. A literature search was conducted in PubMed, Embase, Scopus, and ClinicalTrials.gov from January 2000 to June 2025. Newer antidepressants represent a shift beyond conventional approaches, offering rapid symptom relief and potential cognitive or metabolic benefits. However, limited guideline integration, insufficient long-term data, and implementation barriers restrict their clinical uptake. Clearer sequencing strategies and harmonized recommendations are needed to support more individualized depression management.
Comparable studies
Other narrative reviews on esketamine for depression, most cited first.
| Study | Year | Design | Participants |
|---|---|---|---|
| Synthesizing the Evidence for Ketamine and Esketamine in Treatment-Resistant Depression: An International Expert Opinion on the Available Evidence and Implementation Adults with treatment-resistant depression | 2021 | Review | |
| Long-term safety of ketamine and esketamine in treatment of depression | 2022 | Review | |
| Ketamine, Esketamine, and Arketamine: Their Mechanisms of Action and Applications in the Treatment of Depression and Alleviation of Depressive Symptoms. | 2024 | Review | |
| Variations in BDNF and Their Role in the Neurotrophic Antidepressant Mechanisms of Ketamine and Esketamine: A Review. Patients with depression | 2024 | Narrative review | |
| The Possible Application of Ketamine in the Treatment of Depression in Alzheimer’s Disease | 2022 | Review |