Comparing Documented Physiological Risk Areas by Substance

Relative, research-informed risk ratings by body system. Hover a bar for detail; click a substance in the legend to isolate it.

Each bar shows a documented level of physiological risk — Low, Moderate, High, or Severe — for a body system, compared across four substance categories. These are relative, qualitative ratings for comparison, not exact clinical statistics.

Illustrative, research-informed qualitative ratings for learning — not precise clinical measurements. Any substance use carries risk; risk rises when substances are combined.