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Andrew Kolodny

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Medical Director of Opioid Policy Research, Brandeis University

Kratom powder is produced by the plant Mitragyna speciosa. iStock via Getty Images Plus

April 2, 2026

Kratom poisonings surged 1,200% over the past decade, and regulators are struggling to keep up with the dangers

Andrew Kolodny, Brandeis University

Conflicting claims about kratom are widespread, but scientific evidence makes the risks clear.

Emblems of America’s epidemics. David Gannon/AFP via Getty Images

November 22, 2021

How the pandemic helped spread fentanyl across the US and drive opioid overdose deaths to a grim new high

Andrew Kolodny, Brandeis University

The number of fatal drug overdoses in the US over a 12-month period has surpassed 100,000 for the first time. Fentanyl is the main driver of the spike in deaths.

Michelle Holley holds a photograph of her daughter Jaime Holley, 19, who died of a heroin overdose in November 2016. Lynne Sladky/AP Photo

October 5, 2017

The opioid epidemic in 6 charts

Andrew Kolodny, Brandeis University

Your guide to a public health crisis that’s likely to get worse.

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Location: Waltham, Massachusetts, U.S.
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Joined July 25, 2017