The Yanomamö have curare, the infamous poison, but it’s a very poor form of curare:
There are a lot of tribes in the Amazon Basin that can make really lethal curare. If you scratch yourself, uh, frog poison. I mean a certain kind of frog exudes a very toxic substance that’s lethal. Anyway, the Yanomamö have a really crude way of making curare. Curare is a mixture of the curare and a bunch of other stuff, I don’t know what the other stuff does. They say it adds adhesive qualities to it. It makes it sticky, and sticks to the arrow point. They put a whole bunch of pencil-length pieces of palm wood, and it’s hard as a rock, the palm wood is, and they weaken it by cutting it every inch or so. So when it hits something, it breaks off, and they put poison on it. And when they shoot a monkey, for example, the monkey gets pierced with the curare tipped arrow, it breaks off and leaves the point inside of the monkey, and the monkey just eventually relaxes. The curare relaxes muscles.