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Interaction between warfarin and cannabis
https://onlinelibrary.wiley.com/doi/full/10.1111/bcpt.13152
Damkier, P. et. al.

Oct 15th, 2018 - Delta‐9‐tetrahydrocannabinol (THC), the main psychoactive cannabinoid in cannabis, may inhibit the cytochrome P450 enzyme CYP2C9. Consequently, cannabis use might infer a risk of drug‐drug interaction with substrates for this enzyme, which includes drugs known to have a narrow therapeutic window. In this study, we describe a case report of a 27‐year‐old man treated with ...

Probable Interaction Between Warfarin and Inhaled and Oral Administration...
https://doi.org/10.1177/0897190019854958
Journal of Pharmacy Practice; Hsu A, Painter NA

Jul 17th, 2019 - To report a probable interaction between warfarin and edible cannabis that resulted in an elevated international normalized ratio (INR) without bleeding complications. A 35-year-old Middle Eastern male on warfarin long term with an INR goal of 2.5 (accepted range: 2.0-3.0). The patient has generally been stable on warfarin 10 mg daily from 2010 to 2018, until ...