Sources
Every citation, traceable
Primary authority
- WSU — MDR1 in Dogs (current drug & breed hub)
Washington State University Veterinary Clinical Pharmacology Laboratory (WSU VCPL / PrIMe)
https://waddl.vetmed.wsu.edu/mdr1-in-dogs/
Last verified June 16, 2026
- WSU — MDR1 overview (mechanism, signs, discovery)
Washington State University Veterinary Clinical Pharmacology Laboratory
https://waddl.vetmed.wsu.edu/mdr1/
Last verified June 16, 2026
- WSU — Breeds commonly affected by the MDR1 mutation (frequency table)
Washington State University Veterinary Clinical Pharmacology Laboratory
https://waddl.vetmed.wsu.edu/2021/10/19/breeds-commonly-affected-by-mdr1-mutation/
Last verified June 16, 2026
- WSU — Is your pet at risk of an adverse reaction to common drugs? (dose tiers, genotypes, signs)
Washington State University Veterinary Clinical Pharmacology Laboratory
https://waddl.vetmed.wsu.edu/2021/10/19/is-your-pet-at-risk-of-an-adverse-reaction-to-common-drugs/
Last verified June 16, 2026
- WSU Veterinary Hospital — Is your pet at risk? (mechanism, ivermectin dose figures, signs)
Washington State University Veterinary Teaching Hospital
https://hospital.vetmed.wsu.edu/2021/08/05/is-your-pet-at-risk/
Last verified June 16, 2026
- WSU — MDR1 test pricing & sample types
Washington State University Veterinary Clinical Pharmacology Laboratory
https://waddl.vetmed.wsu.edu/2022/08/29/mdr1-test-pricing/
Last verified June 16, 2026
- WSU PrIMe — How to order the MDR1 test
Washington State University Program in Individualized Medicine (PrIMe)
https://prime.vetmed.wsu.edu/how-to-order/
Last verified June 16, 2026
Product page (test scope/pricing only)
- Embark — MDR1 (drug sensitivity) health condition page
Embark Veterinary, Inc.
https://embarkvet.com/products/dog-health/health-conditions/mdr1-drug-sensitivity/
Last verified June 16, 2026
- Wisdom Panel — MDR1 health condition page
Wisdom Panel (Mars Petcare)
https://www.wisdompanel.com/en-us/dog-health-conditions/mdr1
Last verified June 16, 2026
Deliberately omitted (not cite-pinnable to a current primary source)
These drugs are sometimes listed elsewhere as MDR1-relevant, but we could not confirm them against a live primary source. We omit them from the public drug list rather than risk a health-critical claim we can't stand behind.
- Erythromycin — Appears in older VCPL lists / secondary literature as a P-glycoprotein substrate, but could not be confirmed on a current live WSU URL during our 2026-06-16 verification. Omitted until cite-pinned.
- Domperidone — Same as erythromycin — not confirmed on a current live WSU URL. Omitted until cite-pinned.
- Actinomycin-D (dactinomycin) — A chemotherapy P-glycoprotein substrate cited in secondary sources, but not confirmed on a current live WSU URL. Omitted until cite-pinned.
For how we use these sources, see our methodology.