Andrew M. Williams, PharmD

Clinical Pharmacist, Psychiatry, Riverside University Health System

Adjunct Assistant Professor of Clinical Pharmacy

Clinical Pharmacy

Research Topics

  1. Psychopharmacology
  2. Psychiatric Pharmacy Practice
  3. Off label antipsychotic use
  4. Psychotropic side effect management

Contact Information

  • Riverside County Regional
    Medical Center - Psychiatry
    9990 County Farm Road
    Riverside CA 92503
  • 951-358-4626


PharmD, University of Southern California, 2012
B.S. Health Promotion and Disease Prevention Studies, USC, 2008

Andrew M. Williams


Dr. Williams earned his PharmD degree from USC School of Pharmacy. Following that he went on to complete a PGY-1 in Acute Care/Psychiatry at Keck Hospital of USC and PGY-2 in Psychiatric Pharmacy at USC School of Pharmacy and LAC+USC Medical Center. After completing residency, Dr. Williams entered academia as an Assistant Professor at Loma Linda University School of Pharmacy. He is now a clinical pharmacist at Riverside University Health System (RUHS) where he precepts pharmacy students and residents at Riverside County's inpatient mental hospital, and coordinates the RUHS Pharmacy Internship Program. He continues to provide lectures for various schools of pharmacy. He remains actively involved in the College of Psychiatric and Neurologic Pharmacists (CPNP), serving on national committees and maintaining adjunct faculty appointments with USC, LLU, and University of the Pacific.

Selected Projects/Publications

Williams AM, Knox ED. "When to Prescribe Antidepressants to Treat Comorbid Depression and Pain Disorders." Current Psychiatry. 2017 January; 16(1):55-58.

Wasylyshen A, Williams AM. "Second Generation Antipsychotic Use in Borderline Personality Disorder: What Are We Targeting?" Mental Health Clinician. 2016 Mar; 6 (2): 82-88. doi:

Williams AM, Park SH. "Seizure Associated with Clozapine: Incidence, Etiology, and Management." CNS Drugs. 2015 Feb; 29(2):101-11. doi: 10.1007/s40263-014-0222-y. PMID: 25537107

Williams AM, Dopheide JA. "Nonpsychiatric Medication Interventions Initiated by a PGY-2 Psychiatric Pharmacy Resident in a Patient-Centered Medical Home (PCMH)." Prim Care Compan CNS Disord. 2014:16(6):doi.10.4088/PCC.14m01680. PMID: 25834765