Department of Medical Toxicology

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Faculty & Staff



AO Photo

Ayrn O'Connor, MD, FACMT

Professor of Emergency Medicine and Internal Medicine
Program Director, UACOMP Medical Toxicology Fellowship


Board Certifications Emergency Medicine
Medical Toxicology
Fellowship Indiana University
Residency Indiana University

Recent Publications

Peer-Reviewed Research Articles

  1. Curry SC, Padilla-Jones A, Ruha AM, O'Connor AD, Kang AM, Wilkins DG, Jaeschke H, Wilhelms K, Gerkin RD, Acetaminophen Adduct Study Group. The Relationship Between Circulating Acetaminophen-Protein Adduct Concentrations and Alanine Aminotransferase Activities in Patients With and Without Acetaminophen Overdose and Toxicity. J Med Toxicol. 2019 Apr 12. doi: 10.1007/s13181-019-00705-2. [Epub ahead of print]
  2. O'Connor AD, Padilla-Jones A, Ruha MR. Severe bark scorpion envenomation in adults. Clin Toxicol (Phila). 2017 Jul 28:1-5. doi: 10.1080/15563650.2017.1353095. [Epub ahead of print]
  3. Levine M, O'Connor AD, Padilla-Jones A and Gerkin RD. Comparison of prothrombin time and aspartate aminotransferase in predicting hepatotoxicity after acetaminophen overdose. J Med Toxicol. 2016;12:100-6. doi:10.1007/s13181-015-0504-x.

Case Reports

  1. Heise CW, Cunningham C, Ruha AM, O'Connor AD. One Bite, Two Patients: Disparate Clinical Courses Following Simultaneous Crotalus oreganus abyssus Envenomation. Wilderness Environ Med. 2020 Aug 18:S1080-6032(20)30106-X. doi: 10.1016/j.wem.2020.05.004.

Books/Book Chapters

  1. EMRA and ACMT Medical Toxicology Guide. Katz KK and O'Connor AO, Eds. Emergency Medicine Residents' Association; 2018.
  2. O'Connor AO and Mills KC. Monoamine oxidase inhibitors. In: Brent J, Burkhart K, Dargan P, et al, eds. Critical Care Toxicology, 2nd ed. Cham, Springer International Publishing; 2017.