Drug Overdose Expert Witnesses

Drug overdose expert witnesses and consultants listed here may be able to form expert opinions, draft expert witness reports, provide expert witness testimony at deposition and/or trial as or serve as consulting (non-testifying) experts on drug overdose. The drug overdose expert witness listings on this page are typically from fields/areas of expertise such as: Emergency Medical Services, Emergency Medicine, Internal Medicine, Pharmacist, and Pharmacology- Clinical.

Gary R Polsfuss, MD

Gary R Polsfuss MD INC

San Diego, California
Emergency Medicine, Emergency Medical Services - Drug Overdose, Stroke (CVA), Myocardial Infarction (MI), Septic Shock, Pulmonary Embolism (PE), Alcohol Withdrawal, Meningitis, Aortic Aneurysm (AAA), Vertebral Artery Dissection, Aortic Dissection, Spinal Cord Injury/Paralysis, Appendicitis, Epidural Abscess, Ectopic Pregnancy, EMTALA.
I have 24 years of experience working in Emergency Medicine managing high-risk cases at multiple high volume emergency departments, including a 290-bed Level 3 trauma center and primary psychiatric emergency facility providing care to a largely under-served area, and an urban 700 bed Level 1 trauma and academic center. American Board of Emergency Medicine (ABEM) Certified since 2001. Directorship and Leadership experience for over 17 years. Extensive peer-review and performance improvement experience working with other emergency physicians and mid-level providers. I have worked with both Plaintiff and Defense attorneys. Currently in practice.

Kenneth H Schell, Pharm.D., R.Ph., CIPP

Strom and Associates

Los Angeles, California
Pharmacology- Clinical, Pharmacist - fraudulent controlled drug/narcotic prescriptions, prescription drug abuse, California pharmacy practice, prescription drug monitoring programs (PDMP), CURES, corresponding responsibility, wrongful death, drug overdose, standard of care medication use hospitals, retail pharmacy and clinics
Ken served 8 years on the California Board of Pharmacy, 2003-2011. He was President of that board 2009-2010. He was also a member of the California Society of Health System Pharmacists (CSHP) serving on the CSHP Board of Directors from 1993 - 1997nand as a presidential officer from 1997-1999. Currently, he serves on the Board of Directors for DisabilityRightsNow.com (DRN) a nonprofit created to address the underrepresentation of people with disabilities in the legal field and co-teaches Pharmacy Law and Ethic at the UCSD Skaggs School of Pharmacy and Pharmaceutical Sciences Ken is a member of the America Society for Pharmacy Law (ASPL), the California Society of Health-System Pharmacists, the American Society for Health-System Pharmacists, and the International Association of Privacy Professionals

Karen M. Ryle, MS, RPh

Massachusetts General Hospital

Quincy, Massachusetts
Pharmacist, Pharmacology- Clinical - Experience in Retail, Community and Hospital Pharmacies for over 35 years, Medication Errors, Wrongful Death, Prescription Drug Abuse, Drug Overdose, Substance Use Disorder, Pharmacy Standards of Care, Pharmacy Law, Pharmaceutical Standard of Care, Drug Interactions.
Extensive knowledge in Board of Pharmacy Regulations, she was a member of the Massachusetts Board of Pharmacy for 15 years, serving as president twice. Additionally, she served as an Executive Committee member of the National Association of Boards of Pharmacy (NABP) for over 10 years, including elected as Treasurer, President and Chairperson of the association. She continues to be involved with NABP on committees and task forces. She served as chairperson for the Stakeholders Coalition on Prescribing and Dispensing Controlled Substances. She has assisted the Board of Pharmacy in writing regulations that govern the practice of pharmacy, she is generally familiar with NABP model regulations and regulations adopted in other states. She has a master's degree in Drug Regulatory Affairs and has over 35 years of experience in community pharmacy and hospital practice. She has been practicing as an expert for 20 years, reviewing over 170 cases for both plaintiff and defendant. She has test...

Cathy A Vaughan, PharmD

Durham, North Carolina
Pharmacist, Pharmacology- Clinical - Medication safety, Medication errors, Hospital and ambulatory pharmacy practice, Pharmacy standards, Quality assurance, Adverse drug reactions, Drug interactions, Dispensing errors, Prescribing errors, Drug overdose, Drug monitoring, Critical care
Dr. Vaughan has been in practice as a clinical pharmacist since 2002. She has experience in both the ambulatory and hospital setting. Current practice setting is in a large academic medical center. Dr. Vaughan has expertise in a number of pharmacy practice areas including drug information, medication policy, medication safety, quality improvement, pain medicine, and critical care. She has served as an expert consultant since 2012. Dr. Vaughan has experience reviewing cases related to dispensing and prescribing errors, drug monitoring, adverse effects, drug interactions and compatibility, drug overdose, and pharmacy practice standards.

Alexander Shepherd, MB ChB, PhD, FRCP, FAHA


San Antonio, Texas
Pharmacology- Clinical, Internal Medicine - Drug adverse effect, drug toxicity, poisoning, drug overdose, prescribing, mechanism of drug action, drug Interaction, drug dose, poly-pharmacy, malpractice, drug reaction, drug patent,
I am a Board certified internist and PhD clinical pharmacology expert in drug action and effect with over 35 years of experience. I have been retained in almost 400 legal cases, for both defendants and plaintiffs, usually in medical malpractice cases in which adverse drug effects or actions are involved. I also have extensive expertise in drug litigation and patent disputes. In cases where drug prescribing, dosing, adverse effects and drug interactions are in question, I provide standard-of-care expert witness testimony. I am Board certified in Clinical Pharmacology and in Internal Medicine. I have been Chairman and Executive Director of the American Board of Clinical Pharmacology, President of the American Society of Clinical Pharmacology and Therapeutics and have been on multiple national committees. I teach and practice Clinical Pharmacology and Internal Medicine in an academic and clinical setting.