- Monoamine hypothesis
- Monoamine Oxidase (MAO)
- Reserpine
- Tricyclics
- Selective serotonin reuptake inhibitors (SSRIs)

Drug Treatments for Depressive Disorders

A study following 280 patients suffering from chronic depression compared patients' conditions at time of assessment, before treatment, after treatment, and one year after treatment. Patients were either placed in an inpatient program or on a waiting list. Researchers found that participants who were placed in one of two inpatient programs scored significantly lower on the Beck Depression Inventory - II after treatment compared to those who were placed on a waiting list. Thus, the inpatient programs proved to be notably effective for individuals with chronic depression.

Effectiveness of Intensive Inpatient Program for Chronic Depression Patients

A case study was conducted in Thai Nguyen Province Vietnam, where 359 participants, aged 18-65 years, and their PHQ-9 scores were examined 12 months after a series of group psychotherapy sessions. Researchers found that participants' PHQ-9 scores decreased significantly after treatment, as the mean PHQ score dropped from 13.29 to 2.83 at the 12 month mark. 

Effectiveness of Group-Based Psychotherapy for Depression

While traditional treatment methods have proven to be successful, gaming has emerged as a new potential cheaper alternative. Studies have shown that games have improved socialization, cognition, goal setting, and emotion regulation amongst clinical and nonclinical participants.

Gaming as a Coping Mechanism

1. Kowal, M., Conroy, E., Ramsbottom, N., Smithies, T., Toth, A., & Campbell, M. (2020). Gaming your mental health: A narrative review on mitigating symptoms of depression and anxiety using commercial video games (preprint). JMIR Serious Games. https://doi.org/10.2196/preprints.26575

2. Eielsen, M., Ulvenes, P. G., Røssberg, J. I., Høstmælingen, A., Soma, C. S., & Wampold, B. E. (2022). The Effectiveness of an Intensive Inpatient Psychotherapy Program for Chronic Depression: A naturalistic comparison with wait list. BMC psychiatry, 22(1), 745. https://doi.org/10.1186/s12888-022-04381-5

3. Do, M. T., Nguyen, T. T., & Tran, H. T. (2023). Twelve-month trajectories of depression after group-based psychotherapy led by nonspecialists at Primary Health Centers: A case study from Vietnam. Journal of Behavioral and Cognitive Therapy, 33(3), 169–178. https://doi.org/10.1016/j.jbct.2023.09.002

4. Joshi, A. C., Ghogare, A. S., & Madavi, P. B. (2025). Systematic review of artificial intelligence enabled psychological interventions for depression and anxiety: A comprehensive analysis. Industrial psychiatry journal, 34(2), 158–166. https://doi.org/10.4103/ipj.ipj_363_24

5. Shevchuk, N. A. (2008). Adapted cold shower as a potential treatment for depression. Medical Hypotheses, 70(5), 995–1001. https://doi.org/10.1016/j.mehy.2007.04.052

6. Ma, H., Cai, M., & Wang, H. (2021). Emotional Blunting in Patients With Major Depressive Disorder: A Brief Non-systematic Review of Current Research. Frontiers in psychiatry, 12, 792960. https://doi.org/10.3389/fpsyt.2021.792960

7. Sohal, M., Singh, P., Dhillon, B. S., & Gill, H. S. (2022). Efficacy of journaling in the management of mental illness: a systematic review and meta-analysis. Family medicine and community health, 10(1), e001154. https://doi.org/10.1136/fmch-2021-001154

8. Mota Pereira, J., & Fonte, D. (2018). Pets enhance antidepressant pharmacotherapy effects in patients with treatment resistant major depressive disorder. Journal of Psychiatric Research, 104, 108–113. https://doi.org/10.1016/j.jpsychires.2018.07.004 

References for Depression Treatment Methods

A review of 10 studies on the use of AI as a form of psychotherapy yielded positive results, as 71.67% of the studies noted AI's potential to identify and  treat mental disorders. Studies also indicate that therapy provided by AI chatbots were much more effective than self-led book therapy in alleviating depression and anxiety symptoms.

The Use of AI to Treat Depression

A study conducted on a small group of participants discovered that adapted cold showers were able to alleviate and reduce depressive symptoms. This hypothesis was supported by the fact that cold objects are able to affect the sympathetic nervous system and help stimulate neurotransmitter activity in the brain.

Cold Showers as a Treatment Method

Many MDD patients experience emotional numbness as a side effect of their antidepressants. Some patients simply experience a dulling of their emotions, while other patients may experience a complete inability to feel any emotions. In order to address this phenomenon, many providers either decrease the antidepressant dosage or recommend a switch in patients' medication.

Emotional Blunting as a Side Effect

A review on 20 trials on the effects of journaling supported the use of journaling for treating mental illnesses. Researchers found that journaling had a slight positive effect on many mental illnesses, including depression. Many researchers believe journaling should be implemented as a potential treatment method due to its low cost and self sustainability, although more research should be conducted on the subject.

Journaling as a Treatment Method

This list includes different types of methods for treating and/or managing different depressive disorders. These include:
-	Drug Treatments 
-	Therapies
-	Medical Interventions


Claremont McKenna College

According to the DSM-5, Depressive Disorders constitute a primary category of mood disorders characterized by depression as their central feature. This group of disorders is recognized by the presence of sad, empty, or irritable moods, along with associated somatic and cognitive changes that significantly impair an individual's ability to function. The specific disorders within this category can vary in their duration, timing, and presumed causes.

Depressive Disorders

The DSM-5-TR separates Depressive Disorders into the following specific disorders: 
- Disruptive Mood Dysregulation Disorder
- Major Depressive Disorder (MDD)
- Persistent Depressive Disorder (Dysthymia)
- Premenstrual Dysphoric Disorder
- Substance / Medication-Induced Depressive Disorder
- Depressive Disorder Due to Another Medical Condition
- Other Specified Depressive Disorder
- Unspecified Depressive Disorder
- Unspecified Mood Disorder
- Specifiers for Depressive Disorders


[DSM-5-TR] List of Depressive Disorders 

The DSM-5-TR outlines certain specifiers to help specify the condition of Depressive Disorders according to the different states and condition of the individual.These specifiers are as followed:

Specify if:
- With Anxious Distress
- With Mixed Features
- With Rapid Cycling
- With Melancholic Features
- With Atypical Features
- With Psychotic Features
- With Catatonia
- With Peripartum Onset
- With Seasonal Patterns

Specify if:
- In Partial Remission
- In Full Remission

Specify current severity:
- Mild
- Moderate
- Severe


[DSM-5-TR] Specifiers for Depressive Disorders 

This list includes disorders or conditions that are related to depressive states or features but are not currently directly or officially included in the DSM. These disorders include:
-	Climate Grief
-	Depressive Personality Disorder
-	Double Depression
-	Minor Depression
-	Postpartum Depression
-	Recurrent Brief Depression
-	Seasonal Affective Disorder (SAD)

List of Other Recognized Depressive Disorders

Treatment and Management Methods for Depressive Disorders

This list includes different theories or concepts that are used to explain, define, or otherwise provide further insight into the workings of depressive disorders. These include:
- The Cycle of Depression


Theories and Concepts Relevant to Depressive Disorders

This includes the intersection of connections and/or research related to Depressive Disorders as a general category in other fields of study and research. Such fields include:
-	Behavioral Neuroscience
-	Biomedical Sciences
-	Clinical Psychology
-	Disability Studies
-	Health Psychology
-	Mindfulness

Note: Add additional fields as needed

Interdisciplinary Connections & Research Related to Depressive Disorders, General

Major Depressive Disorder (MDD) and Persistent Depressive Disorder (Dysthymia) are both depressive disorders, but they differ in terms of duration and severity of symptoms. MDD is characterized by one or more major depressive episodes, which are intense and last at least two weeks. Persistent Depressive Disorder involves a more chronic, but often less severe, depressed mood that lasts for at least two years.

Comparison of Major Depressive Disorder and Persistent Depressive Disorder

Read the following vignette. Based on the core characteristics of the group of disorders defined by sad, empty, or irritable moods accompanied by somatic and cognitive changes that significantly impact functioning, explain why this individual's situation might warrant a clinical assessment for such a disorder.

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Related

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