Caleb Alexander

Caleb Alexander is a Professor of Epidemiology and Medicine at the Johns Hopkins Bloomberg School of Public Health and School of Medicine. He serves as founding co-Director of the Center for Drug Safety and Effectiveness and Principal Investigator of the Johns Hopkins-FDA Center of Excellence in Regulatory Science and Innovation (JH-CERSI). His research focuses on prescription drug utilization, safety, and policy, with significant contributions to understanding the opioid epidemic and pandemic responses.

• Education
  • BA, University of Pennsylvania (1993)
  • MD, Case Western Reserve University (1998)
  • MS, University of Chicago (2003)

Dr. Alexander's research spans pharmacoepidemiology, regulatory policy, and health services research. Recent work examines drug safety during the COVID-19 pandemic, focusing on immunosuppressive therapies and antiviral agents like Paxlovid. He also investigates opioid utilization, biologic therapies for asthma, and cardiovascular risks of ADHD medications.

His publications include 375+ peer-reviewed articles, with a surge in 2025 on topics like post-transplant diabetes and Long COVID. Key journals: NEJM, JAMA Internal Medicine, Annals of Internal Medicine.

• Scientific Awards
  • Edward W. Holmes Resident Research Award (2001)
  • Robert Wood Johnson Faculty Scholar (2006-2009)
  • Fellow of the American College of Physicians (2011)
  • Sigma Xi Award for Impact on Science (2009)

Dr. Alexander mentors trainees and leads multi-institutional consortia like the National COVID Cohort Collaborative (N3C). His work informs U.S. Senate and House committees and shapes pharmaceutical policy.