A Case of Suicide Attempt Linked to Cognitive Decline From Polysubstance Use
A 30-year-old man who used cannabis, MDMA, and cocaine for three years developed cognitive deficits that led to professional and personal decline, depression, and a suicide attempt.
Quick Facts
What This Study Found
The authors described a 30-year-old man who used cannabis, MDMA (ecstasy), and cocaine for at least three years and subsequently developed significant cognitive and working memory deficits.
These cognitive problems led to increasing difficulties in his professional and personal life. As his functioning declined, he developed depressive symptoms including hopelessness and helplessness, which progressed to active suicidal ideation and ultimately a suicide attempt.
The authors proposed a causal chain: polysubstance use caused cognitive deficits, which caused functional decline, which caused depression, which caused suicidal behavior. They highlighted this pathway as an underrecognized mechanism linking substance use to suicide risk.
Key Numbers
One 30-year-old male patient. At least 3 years of polysubstance use (cannabis, MDMA, cocaine). Cognitive deficits in working memory and executive function. One suicide attempt documented.
How They Did This
This is a single case report describing one patient's clinical course. The authors assessed cognitive function, reviewed substance use history, and documented psychiatric symptoms and the suicide attempt.
Why This Research Matters
This case report proposed a specific mechanism by which substance use could lead to suicidality: through cognitive decline and functional impairment rather than through direct pharmacological effects on mood. This pathway may be underrecognized in clinical practice.
The Bigger Picture
While a single case report cannot establish causation, the proposed pathway from cognitive decline to functional impairment to depression to suicidality represents an important clinical concept that subsequent research has continued to explore across different substance use populations.
What This Study Doesn't Tell Us
A single case report cannot establish causation. The patient used multiple substances, making it impossible to attribute cognitive deficits to any single drug. Pre-existing vulnerabilities (cognitive, psychiatric) may have preceded substance use. No objective baseline cognitive testing was available.
Questions This Raises
- ?How common is the pathway from substance-induced cognitive decline to suicidality?
- ?Can cognitive rehabilitation reduce suicide risk in this population?
Trust & Context
- Key Stat:
- Case study: cognitive decline from polysubstance use preceded a suicide attempt
- Evidence Grade:
- This is a single case report, the weakest form of clinical evidence. It can generate hypotheses but cannot establish that the proposed causal chain applies broadly.
- Study Age:
- Published in 2007. The relationship between substance use, cognitive impairment, and suicidality has been explored in larger studies since.
- Original Title:
- High suicide risk after the development of cognitive and working memory deficits caused by cannabis, cocaine and ecstasy use.
- Published In:
- Substance abuse, 28(1), 25-30 (2007)
- Authors:
- Pompili, Maurizio(3), Lester, David, Girardi, Paolo, Tatarelli, Roberto
- Database ID:
- RTHC-00287
Evidence Hierarchy
Describes what happened to one person or a small group.
What do these levels mean? →Frequently Asked Questions
Was cannabis specifically responsible for the cognitive decline?
The patient used cannabis, MDMA, and cocaine together. The case report could not determine which substance or combination was most responsible for the cognitive deficits.
How common is this pattern?
A single case report cannot answer this. However, cognitive deficits from chronic substance use and their impact on functioning and mental health are documented across multiple study types.
Read More on RethinkTHC
Cite This Study
https://rethinkthc.com/research/RTHC-00287APA
Pompili, Maurizio; Lester, David; Girardi, Paolo; Tatarelli, Roberto. (2007). High suicide risk after the development of cognitive and working memory deficits caused by cannabis, cocaine and ecstasy use.. Substance abuse, 28(1), 25-30. https://doi.org/10.1300/J465v28n01_04
MLA
Pompili, Maurizio, et al. "High suicide risk after the development of cognitive and working memory deficits caused by cannabis, cocaine and ecstasy use.." Substance abuse, 2007. https://doi.org/10.1300/J465v28n01_04
RethinkTHC
RethinkTHC Research Database. "High suicide risk after the development of cognitive and wor..." RTHC-00287. Retrieved from https://rethinkthc.com/research/pompili-2007-high-suicide-risk-after
Access the Original Study
Study data sourced from PubMed, a service of the U.S. National Library of Medicine, National Institutes of Health.
This study breakdown was produced by the RethinkTHC research team. We analyze and report published research findings without making health recommendations. All interpretations are based solely on the published abstract and study data.