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David J. Vearrier

David J. Vearrier, MD, MPH

Adjunct Associate Professor of Emergency Medicine

Department: Emergency Medicine

Specialties: Emergency Medicine, Medical Toxicology, Occupational Medicine


  • MPH - Drexel University School of Public Health (2013)
  • MD - University of California San Diego (2005)
  • BA in Psychology and History - University of California Berkeley (2000)

Memberships / Professional Affiliations

  • Member, American College of Occupational and Environmental Medicine
  • Fellow, American Academy of Emergency Medicine
  • Fellow, American College of Medical Toxicology
  • Fellow, American Academy of Clinical Toxicology

David Vearrier, MD, MPH, is on staff at Roxborough Memorial Hospital, where he sees patients as an attending physician in the emergency department. He oversees emergency medicine resident physicians and physician assistants while they provide care in the emergency department. Dr. Vearrier served on the Pharmacology and Therapeutics Committee and the Graduate Medical Education Committee at Hahnemann University Hospital.

Dr. Vearrier also sees patients as a medical toxicologist both in the emergency department and on an inpatient basis at St. Christopher’s Hospital for Children, Mercy Hospital of Philadelphia and Mercy Fitzgerald Hospital. He oversees medical toxicology fellows as they provide care at those facilities. Dr. Vearrier is on staff at the Children’s Hospital of Philadelphia, where he provides expert medical toxicology consultation for the regional Poison Control Center.

Dr. Vearrier earned his bachelor of arts degrees in history and psychology from the University of California, Berkeley, which he attended on a merit-based Regents' and Chancellor's Scholarship, the University's most prestigious award to incoming undergraduates. He graduated with high distinction and completed his thesis on "The History of the Bancroft Library."

He was awarded a second Regents' and Chancellor's Scholarship at the University of California, San Diego, where he attended the School of Medicine and earned his doctor of medicine (MD) degree. Dr. Vearrier subsequently earned his master of public health (MPH) degree from Drexel University School of Public Health. He is a member of the Beta Omega Chapter of the Delta Omega Public Health Honor Society.

Dr. Vearrier completed his residency in emergency medicine at Hahnemann University Hospital/Drexel University College of Medicine. Following residency, he continued his training at Hahnemann and Drexel University College of Medicine, completing his fellowship in medical toxicology. After working at an outside institution, he returned to Drexel.

Dr. Vearrier completed a residency in occupational medicine at the University of Pennsylvania Perelman School of Medicine. As a resident, he twice won the American College of Occupational and Environmental Medicine Resident Research Award and also won the American Occupational Health Conference Occupational Physicians Scholarship Fund Resident Scholarship. He is a certified medical review officer and has conducted thousands of reviews of employment-related drug tests.

Clinical Services

Emergency medical procedures, Toxicology


  • Emergency Medicine - Hahnemann University Hospital/Drexel University College of Medicine


  • Emergency Medicine - Hahnemann University Hospital/Drexel University College of Medicine
  • Occupational Medicine - University of Pennsylvania Perelman School of Medicine


  • Medical Toxicology - Drexel University College of Medicine (2008–2010)

Affiliated Hospitals

Roxborough Memorial Hospital, Children's Hospital of Philadelphia, Mercy Philadelphia Hospital, Mercy Fitzgerald Hospital

David Vearrier, MD, MPH, is active in both undergraduate and graduate medical education at Drexel University College of Medicine. He is the course director for the Medical Toxicology Clerkship, an elective available to fourth-year medical students. At the graduate medical education level, he was the program director for the Medical Toxicology Fellowship and a core faculty member for the Emergency Medicine Residency. He developed the medical toxicology core curriculum used in both the Medical Toxicology Fellowship and the medical toxicology rotations for residents, pharmacy residents and medical students.

Dr. Vearrier also provides guest lectures to other specialties and subspecialties both at Drexel University College of Medicine and at other regional academic medical centers. He won the Hahnemann Teaching Award four years in a row (2012-2015).

Dr. Vearrier is the course director for the Occupational & Environmental Toxicology course for the Occupational Medicine Residency at the University of Pennsylvania Perelman School of Medicine, where he holds an adjunct faculty appointment.

He is the chair for the Occupational and Environmental Special Interest Group of the American Academy of Clinical Toxicology. He organizes national webinars on occupational and environmental toxicology topics and organizes symposia on occupational and environmental toxicology issues for the North American Congress of Clinical Toxicology each year.

Dr. Vearrier is an assistant editor of the online medical toxicology physician resource ToxED. He has authored a number of drug and antidote monographs for that resource.

Research Interests

Occupational, industrial and environmental toxicologic exposures; toxicologic exposure risk assessment; driving impairment; epidemiology of drug abuse


Dr. Vearrier oversees the research agenda for the Division of Medical Toxicology and mentored medical toxicology fellows on their research projects. He has conducted research on driving impairment, effects of herbal supplements on driving ability and the epidemiology of DUI and DUID. In addition, Dr. Vearrier is the lead author of one of the most comprehensive reviews of driving impairment in the peer-reviewed medical literature.

Dr. Vearrier has conducted research on adverse health effects associated with low-level environmental exposures utilizing large-scale population-based databases. He has published research findings on the effects of low-level uranium and phthalates and human health effects. He has also investigated the effect of advanced age on release of lead from bone stores.

In addition, Dr. Vearrier has conducted research on the epidemiology of drug abuse and the perception of risk associated with illicit drugs. For more information on his published research, please visit his NCBI bibliography. In addition to original research, Dr. Vearrier has published a number of book chapters, systematic reviews and case reports in the peer-reviewed medical literature. He is a peer reviewer for a number of MEDLINE-indexed journals.

In the Media


Dr. Vearrier’s peer-reviewed journal articles, book chapters, meeting abstracts, presentations and other publications are available at the National Center for Biotechnology Information.

Selected Recent Publications

How Do I Diagnose and Treat Workers With Injuries From Hydrofluoric Acid?
Vearrier D
J Occup Environ Med. 2016 Jul;58(7):e275-7. doi: 10.1097/JOM.0000000000000762. PubMed PMID: 27218277.

Issues in driving impairment 
Vearrier D, Vearrier L, McKeever R, Okaneku J, LaSala G, Goldberger D, McCloskey K
Dis Mon. 2016 Apr;62(4):72-116. doi: 10.1016/j.disamonth.2016.02.002. Epub 2016 Mar 17. Review. PubMed PMID: 26997643.

Sea-dumped chemical weapons: environmental risk, occupational hazard
Greenberg MI, Sexton KJ, Vearrier D
Clin Toxicol (Phila). 2016;54(2):79-91. doi: 10.3109/15563650.2015.1121272. Epub 2015 Dec 22. Review. PubMed PMID: 26692048.

Phenol Toxicity Following Cutaneous Exposure to Creolin®: A Case Report 
Vearrier D, Jacobs D, Greenberg MI
J Med Toxicol. 2015 Jun;11(2):227-31. doi: 10.1007/s13181-014-0440-1. PubMed PMID: 25326371; PubMed Central PMCID: PMC4469710.

Metal fume fever and polymer fume fever
Greenberg MI, Vearrier D
Clin Toxicol (Phila). 2015 May;53(4):195-203. doi: 10.3109/15563650.2015.1013548. Epub 2015 Feb 23. Review. PubMed PMID: 25706449.

Change in perceived risk associated with marijuana use in the United States from 2002 to 2012
Okaneku J, Vearrier D, McKeever RG, LaSala GS, Greenberg MI
Clin Toxicol (Phila). 2015 Mar;53(3):151-5. doi: 10.3109/15563650.2015.1004581. Epub 2015 Feb 3. PubMed PMID: 25646638.

K2--not the spice of life; synthetic cannabinoids and ST elevation myocardial infarction: a case report
McKeever RG, Vearrier D, Jacobs D, LaSala G, Okaneku J, Greenberg MI
J Med Toxicol. 2015 Mar;11(1):129-31. doi: 10.1007/s13181-014-0424-1. PubMed PMID: 25154434; PubMed Central PMCID: PMC4371021.

Effect of single-dose Ginkgo biloba and Panax ginseng on driving performance
LaSala GS, McKeever RG, Patel U, Okaneku J, Vearrier D, Greenberg MI
Clin Toxicol (Phila). 2015 Feb;53(2):108-12. doi: 10.3109/15563650.2014.999159. Epub 2015 Jan 19. PubMed PMID: 25597699.

The epidemiology and characteristics of carbon monoxide poisoning among recreational boaters
LaSala G, McKeever R, Okaneku J, Jacobs D, Vearrier D
Clin Toxicol (Phila). 2015 Feb;53(2):127-30. doi: 10.3109/15563650.2014.996571. Epub 2015 Jan 8. PubMed PMID: 25567686.

Urine uranium concentrations and renal function in residents of the United States--2001 to 2010
Okaneku J, Vearrier D, Mckeever R, Lasala G, Greenberg MI
Clin Toxicol (Phila). 2015;53(10):931-4. doi: 10.3109/15563650.2015.1094704. Epub 2015 Oct 15. PubMed PMID: 26468995.

* This physician's clinical practice is independent of Drexel University.

Contact Information

Department of Emergency Medicine
245 N. 15th Street
MS 1011
Philadelphia, PA 19102
Phone: 215.762.2368
Fax: 215.762.1307