Ricky Bluthenthal, PhD

Distinguished Professor of Population and Public Health Sciences

Chair, Department of Population and Public Health Sciences

Flora L Thornton Chair in Preventive Medicine

Image of Ricky Bluthenthal, PhD
Is this your profile? Click to edit

Overview

Ricky N. Bluthenthal, Ph.D. is a Distinguished Professor of Population and Public Health Sciences and Chair of the Department of Population and Public Health Sciences in the Keck School of Medicine at the University of Southern California. He is also the Flora L. Thornton Chair in Preventive Medicine. He received a BA in History and Sociology from the University of California Santa Cruz and a MA and PhD in sociology from the University of California Berkeley. His research has established the effectiveness of syringe exchange programs, tested novel interventions and strategies to reduce HIV risk and improve HIV testing among injection drug users and men who have sex with men, documented how community conditions contribute to health disparities, and examined health policy implementation. His current studies include an observational cohort study of how cannabis legalization impacts use patterns and health outcomes of cannabis and opioids among people who inject drugs and a randomized controlled trial to test the efficacy of a single session intervention to reduce injection initiation risk behaviors among established people who inject drugs. Dr. Bluthenthal has authored or co-authored over 200 articles in peer-reviewed scientific journals such as the American Journal of Public Health, Social Science and Medicine, The Lancet, Addiction, and Alcoholism: Clinical and Experimental Research among others. He is on the editorial boards of the International Journal of Drug Policy and the Drug and Alcohol Dependence.

#Courses
Program Evaluation and Research
Introduction to Health Promotion and Disease Prevention
Qualitative Research Methods in Public Health
Practice of Public Health

Education and Training

  • UC Berkeley, Berkeley, CA — PhD — 12/1998 — Sociology
  • UC Berkeley, Berkeley, CA — MA — 12/1990 — Sociology
  • UC Santa Cruz, Santa Cruz, CA — BA — 06/1986 — History & Sociology

Research Funding

  • Cannabis use and health outcomes among opioid-using people who inject drugs in the context of cannabis legalization
    NIH · R01DA046049 · Feb 1, 2019 – Nov 30, 2023 · Role: Principal Investigator
  • Preventing injection initiation: The Change The Cycle Randomized Controlled Trial
    NIH · R01DA038965 · Aug 1, 2015 – Jun 30, 2020 · Role: Principal Investigator
  • Partners for Strong, Healthy Families (PSHF)
    NIH · R24MD007978 · Aug 8, 2013 – Mar 21, 2018 · Role: Principal Investigator
  • Exploratory Research on Late Initiation of Drug Injection
    NIH · R01DA027689 · Sep 30, 2010 – Aug 31, 2015 · Role: Principal Investigator
  • PS08-002, THE HJ MILE HIV PREVENTION INTERVENTION
    NIH · UR6PS001098 · Sep 30, 2008 – Sep 29, 2013 · Role: Principal Investigator
  • Impact of Business Improvement District on Youth Violenc
    NIH · U49CE000773 · Sep 1, 2005 – Aug 31, 2010 · Role: Principal Investigator
  • Understanding Outcome Disparities in Alcohol Treatment
    NIH · R21AA013813 · May 8, 2003 – Apr 30, 2006 · Role: Principal Investigator
  • COMMUNITY CONTEXT, SEP OPERATIONS, &HIV RISK AMONG IDUs
    NIH · R01DA014210 · Sep 30, 2002 – Nov 30, 2007 · Role: Principal Investigator
  • Malt beverage use &outcomes in a minority community
    NIH · R21AA013534 · Sep 29, 2001 – Aug 31, 2004 · Role: Principal Investigator
  • SYRINGE EXCHANGE PEER MOBILIZATION INTERVENTION
    NIH · R01DA009532 · Jul 15, 1995 – Mar 31, 2007 · Role: Co-Principal Investigator

Publications

  • Material hardship moderates the association between cannabis use frequency and opioid withdrawal frequency among people who inject drugs. Drug Alcohol Depend. 2026 Jul 21; 286:113284.. View in PubMed
  • “Do you guys tell anybody?”: Exploring allocation and implementation of opioid settlement funds and reduced access to health vending machines for people who use drugs. J Stud Alcohol Drugs. 2026 Jul 09.. View in PubMed
  • Profiles of stress and their associations with substance use among adults of color. Drug Alcohol Depend. 2026 Aug 01; 285:113219.. View in PubMed
  • Passport to Wellness Intervention: Selecting and Training Peer Mentors and Their Reflections on Supporting to Black Sexual Minority Men’s Social and Health Needs. J Homosex. 2026 May 18; 1.. View in PubMed
  • HIV-Stigmatizing Beliefs and Attitudes as a Barrier to Early PrEP Care Continuum Engagement Among People Who Inject Drugs. AIDS Behav. 2026 Apr 09.. View in PubMed
  • Expanding power and opportunity in public health education: the continuous learning for antiracist culture change fellowship program. Front Public Health. 2026; 14:1766034.. View in PubMed
  • Understanding the Impact of Structural Racism and Violence Across the Lifespan on Overdose Vulnerability Among Black San Franciscans Experiencing Homelessness. J Psychoactive Drugs. 2026 Mar 17; 1.. View in PubMed
  • Development and Validation of a Provider-Specific Anticipated Stigma Scale for People Who Inject Drugs. AIDS Behav. 2026 Mar 14.. View in PubMed
  • Childhood trauma and everyday discrimination: Associations with psychological and physiological health. Mil Psychol. 2026 Feb 25; 1.. View in PubMed
  • Healthcare First: Delivering Immediate, Non-Contingent, and Coordinated Services Through the Street Medicine Model. Res Sq. 2026 Feb 12.. View in PubMed