"Poisons can be either completly useless, or a giant help in a Zombie infestation. This relys on the fact whether a zombie's heart circulates blood or not. IF it does (which would mean they would bleed if wounded) then any sort of poison could be effective against them. A poison that would normally kill a man should be completly inefective against the zombies even if they do have circulating blood, but if you engineered your own muscle relaxers with everyday medicine it could be a deadly weapons. One of these would contract all the muscles of a Zed and cause them to either slow down or completely collapse, considering they used to be just like us it should in theory work.

Now even if the poisons didnt work on zeds they could still be used on humans if needed.

Any ideas on the subject?"

"Well, if you were using poison, you would need to use a neuro-toxin, something that will target the nerves and the brain. This keeps with the "Kill the brain, kill the zombie" motto that seems to keep springing up."

"If they don't breathe and their heart doesn't pump, their muscles wouldn't work. But that's another arguement."

"I'm gonna say that they would be entirely ineffective, because a Zombie isn't alive. It's flesh and cells are all dead, also meaning that the nerves are all dead. There are no responses to pain, or anything else. Poison would be like administering water to a rock. A mobile rock, but a rock regardless.

And if, based on all fictional accounts, the head is the only way to stop them, the heart is useless. If the heart is useless, then it doesn't pump. If it doesn't pump it won't dose out the poison to the rest of the body, and then you're back to step one."