Stimulant-involved overdose deaths: Constructing dynamic hypotheses

Area of Science:

• Public Health
• Epidemiology
• Substance Use Research

Background:

• The United States faces an evolving overdose epidemic.
• There is a notable increase in overdose deaths involving stimulants (cocaine, methamphetamine) and opioids.
• The underlying reasons for these evolving trends remain unclear.

Purpose of the Study:

• To identify and explain dynamic hypotheses behind the rise in stimulant-involved overdose deaths.
• To understand the complex interplay between opioid and stimulant use in overdose fatalities.
• To inform targeted public health interventions for the overdose crisis.

Main Methods:

• Conducted interviews and group model building workshops in Massachusetts and South Dakota.
• Utilized existing research and collected qualitative data to develop hypotheses.
• Visualized dynamic hypotheses using causal loop diagrams.

Main Results:

• Six dynamic hypotheses were identified for stimulant-involved overdose trends.
• Three hypotheses address stimulant- and opioid-involved deaths: fentanyl contamination, primary stimulant users adopting opioids, and primary opioid users adopting stimulants.
• Three hypotheses address stimulant-only deaths: disbelief in stimulant lethality, changes in stimulant supply unpredictability, and health deterioration from long-term stimulant use.

Conclusions:

• Confusion and uncertainty regarding the stimulant drug supply are central themes.
• The chaotic and unpredictable nature of the stimulant market significantly contributes to overdose risk.
• Further research is needed to analyze contamination effects, reduce market confusion, and examine historical stimulant use patterns to develop effective interventions.