It is possible that the "release" they seek is a legal thing...
Plavix is RX and all the rest are OTC. Doctors must give RX for Plavix but OTC things are up to the patient.

I am concerned because ALL blood thinning things should be included in the final directions to the patient. So while it is true, legally they need that release from your doctor for the Plavix, it is their responsibility to see that YOU the patient do not consume other drugs or OTC things that can thin the blood.

You know I have been researching Fenugreek, (put a thread up on Diabetes forum), and Fenugreek has blood thinning potential too. Does Alan eat those sprouts with you? Many herbs including ginger have warnings to not consume with Coumadin, because of this blood thinning potential.

The doctors doing surgical procedures typically have lengthy lists of things to avoid. I don't understand what is going on at this place Alan is due to visit. It is possible to hit a blood vessel doing spinal injections. The bleeding warnings are to cover this possibility.