Doctor, I'm a DVT patient still taking warfarin, can I take cayenne pepper spice? Am told it is good for blood circulation.

Caution. This herb capsicum (cayenne) may have the potential to prolong clotting time, so people taking warfarin should exercise caution before eating quantities of chili peppers. Cayenne also inhibits liver enzymes (cyp1a2) and thus slows the metabolism of warfarin. The combined effect could lead to an increased risk of bleeding.
Yes. Not harmful, tasty, not particularly helpful to blood vessels.