# Bracketing Estimation of Intentional Polysubstance Use in the United States

## TL;DR

This paper estimates that around 8 to 14 million people in the US have multiple substance use disorders, a condition involving problems with more than one substance.

## Contribution

The paper introduces a pragmatic method to bracket the prevalence of multiple substance use disorders in the US.

## Key findings

- A reasonable estimated range of multiple substance use disorder in the US is about 8 to 14 million persons.
- The approach provides a quick estimate for stakeholders addressing the crisis of multiple substance use disorders.

## Abstract

Evidence from diverse sources suggests that persons who have a substance use disorder (SUD) often have problems with one or more additional substances, a situation broadly, if imprecisely, termed polysubstance use or more preferably multiple substance use disorder (mSUD). Because of the heavy toll of maladaptive neuronal dysregulation, morbidity, and mortality of SUDs, and increasingly of mSUD, on the individual, their families, the healthcare system, insurers, regulators, and society at large, it seems of value to have an estimate of the prevalence of mSUD. This turns out to be surprisingly difficult, due to nebulous or disparate definitions and to weaknesses in data acquisition methodology. We here attempt a pragmatic way of bracketing an estimate of mSUD prevalence in the US. We conclude that a reasonable estimated range of mSUD in the US is about 8 to 14 million persons. This approach provides a quick estimate for stakeholders involved in efforts to understand or deal with the immediate crisis of mSUD, as more refined estimations are pursued.