ATrain Education


Continuing Education for Health Professionals

Mary Lynn Mathre, RN, MSN, CARN Mary Lynn Mathre, RN, MSN, CARN

Mary Lynn (ML) Mathre is an independent medical cannabis and addictions consultant. Her focus on medicinal cannabis began in 1985 with the completion of her graduate thesis Disclosure of Marijuana Use to Health Care Professionals. Since then she has written cannabis resolutions for several organizations, including the Virginia Nurses Association, the International Nurses Society on Addictions, and the American Public Health Association.

After earning her BSN from the College of St. Teresa in Winona, Minnesota, Mary Lynn began her career in the U.S. Navy Nurse Corps as a medical-surgical specialist. Four years later she returned to school and earned her Master's degree from Case Western Reserve University. Mary Lynn began teaching at the University of Virginia School of Nursing but changed her focus to addictions nursing and returned to clinical practice. She first worked on the Addictions Treatment Unit at UVA, then as the addictions consult nurse for the UVA Health System, and from 2004 to 2007 she was executive director of an opioid treatment program in Charlottesville.

Mary Lynn has written numerous articles and chapters on medicinal cannabis and has served as an expert witness. She is editor of Cannabis in Medical Practice: A Legal, Historical, Pharmacological Overview of the Therapeutic Use of Cannabis (1997) and co-editor of Women and Cannabis: Medicine, Science, and Sociology (2002).

Mary Lynn Mathre is the president and co-founder of Patients Out of Time, a national non-profit organization dedicated to educating healthcare professionals and the public about the therapeutic use of cannabis ( She is also a founding member and president of the newly created American Cannabis Nurses Association ( 


Opioids as Medications

Cannabis (Marijuana) for Medical Use