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Nathan M. Hager

3 papers in the library · publishing 2015-2026

Papers

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Lifetime psychedelic use and opioid use disorder severity in a National Survey: the roles of psychedelic type and mental health.

Addictive Behaviors June 1, 2026 Sebastian Ehmann, Nathan M. Hager, Paul S. Regier et al.

Opioid use disorder (OUD) remains a major public health crisis in the United States, with mental health disorders substantially increasing risk severity. Emerging evidence suggests psychedelics may relate to reduced OUD risk. This exploratory study examined associations between lifetime psychedelic use and OUD severity and tested whether these associations varied by mental health impairment....

Lifetime Psychedelic Use and Opioid Use Disorder Severity: Substance-Use Pattern Specific and Mental Health–Dependent Associations in a National Survey

PsyArXiv November 2, 2025 Sebastian Ehmann, Nathan M. Hager, Paul S. Regier et al. preprint

Background and AimsThe ongoing opioid epidemic remains a major public health crisis in the United States, with over 100,000 opioid-related deaths annually. Mental health disorders are strongly associated with opioid use disorder (OUD), compounding risks of misuse and overdose. Emerging evidence indicates that psychedelics may be associated with reduced risk of OUD. This study aimed to estimate...

Cannabis, Cigarettes, and Their Co-Occurring Use: Disentangling Differences in Gray Matter Volume.

The International Journal of Neuropsychopharmacology June 4, 2015 Reagan R Wetherill, Kanchana Jagannathan, Nathan M. Hager et al.

Structural magnetic resonance imaging techniques are powerful tools for examining the effects of drug use on the brain. The nicotine and cannabis literature has demonstrated differences between nicotine cigarette smokers and cannabis users compared to controls in brain structure; however, less is known about the effects of co-occurring cannabis and tobacco use. We used voxel-based morphometry...