I don't know if this is any help, but I just stumbled across it and remembered your post.
What drug(s) may interact with warfarin?
Warfarin interacts with many other medicines; some are listed below:
โขagents that dissolve blood clots
โขagents that lower cholesterol
โขalcohol
โขallopurinol
โขamiodarone
โขantibiotics or medicines for treating bacterial, fungal or viral infections
โขantiinflammatory drugs, NSAIDs, such as ibuprofen
โขaprepitant
โขaspirin, acetaminophen (Tylenolยฎ)
โขazathioprine
โขbarbiturate medicines for inducing sleep or treating seizures
โขbosentan
โขcimetidine
โขcyclosporine
โขdisulfiram
โขfemale hormones, including contraceptive or birth control pills
โขfish oil (omega-3 fatty acids) supplements
โขherbal products such as danshen, garlic, ginkgo, ginseng, green tea, or kava kava
โขinfluenza virus vaccine
โขmale hormones
โขmedicines for some types of cancer
โขcertain medicines for heart rhythm problems
โขcertain medicines for high blood pressure
โขquinidine, quinine
โขseizure or epilepsy medicine such as carbamazepine, phenytoin, and valproic acid
โขtestolactone
โขthyroid medicine
โขtolterodine
โขvitamin K (including vitamin, mineral, and food supplements that contain vitamin K)
Source: www.drugdigest.org