1. constriction band several inches above the bite, if it's on a limb. NOT A TOURNIQUET. You want to slow the flow of venous blood and lymphatic fluid not the arterial supply. Monitor to make sure it does not become a tourniquet.
I thought that constricting the flow of venom was only suitable for elapids. Whereas for pit vipers, confining the venom to a small area only increases the likelihood of permanent necrotic damage.