O.K., I can tell about this a little. Years ago I had a brief encounter with this stuff, some folks in the south still use it. These folks use a needle in the tip of an arrow, the cylinder of the needle holds the poison, and upon a very hard impact, the poison is pushed out of the cylinder, and thu the needle into the animals muscle. The cylinder uses a blank shot to make it go. If mixed properly, the animal won't go 10 yards. This stuff is not legal here or anywhere else, as far as I know, however, it was brought up for vote in the house years ago. If you think about it, it is probably more humane than a normal broadhead in the hands of most hunters. No injured, crippled, or suffering animals, Either they are dead, or not. The stuff absolutely does not affect the meat in any way. You could ingest it and it will not harm you. The reason I know this for sure is that years ago, a distraught woman tried to commit suicide by swallowing a whole bottle(enough to kill a dozen deer) and it only made her sick. I know this person well.
Also shooting yourself is next to impossible with the needle apparatus. It takes a terrific force to make it go off. You still have to get the animal within 20, 30 yards to make an effective shot. I don't use it, but It doesn't bother me if some do. Some folks think compound bows with sights and a release is unethical.. I say just get out in the woods, and enjoy what we have.