Is slippery elm safe with warfarin if taken at a different time. if so how much time should elapse?

Yes, 2 hours apart: Slippery elm does not interact with warfarin on a database check. Slippery elm taken orally produces a thick gelatinous gummy substance that interferes with the absorption of meds. So it should be taken at least 2 hours before or 2 hours after the warfarin. More importantly, with warfarin you need to consume the same things every day. Then your INR is corrected for what you are really doing.