Dr. MacCallum completed her undergraduate degrees in Pharmacy and Medicine at Memorial University in Newfoundland where she was born and raised. She graduated from the University of British Columbia in 2013 where she compelted her speciality in Internal Medicine.
She developed expertise in complex pain and addiction while working in a variety of pain clinics and hospital programs in Vancouver. She became particularly interested in complex diseases including; fibromyalgia, chronic fatigue, lyme disease, IBS, PTSD, pevlic pain, migraines and others. In working with these patients she realized that not all patients responded or tolerate on/off label prescription medications. Patients reported that cannabis was helpful at managing many symptoms including pain, anxiety, mood, sleep and nausea. This created a shift for Dr. MacCallum, from focusing on disease specific to symptom based management.
Dr. MacCallum is a clinical instructor in the dept of Medicine, adjunct professor in the faculty of pharmaceutical sciences program, and associate member in the dept of palliative Care at the University of British Columbia. She is the medical director at Greenleaf Medical Clinic where she has assessed and developed cannabinoid treatment plans for more than 3,000 patients using legal medical cannabis approved by Health Canada.
She is a coauthor of the publication Practical Consideration for Medical Cannabis Administration and Dosing which is the first of its kind on medical cannabis dosing. She has presented internationally on the topic of cannabis dosing and cannabis and opioid. She is the expert for several medical cannabis courses; has qualified as a medical cannabis expert and testified in arbitration for a claim involving a challenge to Health Canada’s 24-hour rule for cannabis impairment.
She is working with university research groups, hospitals, health benefit programs, provincial and national committees to create; cannabis guidelines, safe THC prescribing practices, clinical trials, patient registries and adverse event monitoring.
She is particularly interested in studying cannabis as a therapeutic option for complex conditions, as a substitute for opioid, for deprescribing, standardized product and testing, and impairment.