The snakebite tourniquet is a way of treating all kinds of venoms quickly by rubbing ground buffalo gourd seeds in the wound while using the tubing to tie off the limb to inoculate against further poisoning. If the player possesses a tourniquet when he/she becomes poisoned by an animal, the tourniquet will be automatically applied to counter the poison.
This item can be crafted by the player.
Surgical tubing (1)
Lonesome Road add-on
Snakebite tourniquet (1)
A few can be found in the footlocker after completion of Lonesome Road. Ulysses will also give the Courier a few if he is spared.
This item is available for crafting even before the DLC is activated or completed. This helps make tourniquets a decent alternative to standard antivenom, due to the needed components for the former being more common than the latter.