HELP! A question on Snake venom running through the blood vessels!!!?

The idea is to suck out as much of the vemon from the wound as you can, before it has enough time to move through the body, then what remains will be a smaller amount and therefore like toxic. It should be done immediately after the bite because after a few minutes the vemon would have moved a fair bit, so as soon as possible and for a minute at least! However this is definitely not all you're to do! If the bite is on and arm or leg you HAVE to wrap the limb TIGHTLY all the way up and down the arm, the point is to contrict it as much as possible to stop the blood from moving, not to make the arm fall off obviously haha, but just to slow it down a lot.