I'm looking for a specific poison that I can't remember the name of. It is or comes from a decently common plant and it works by paralyzing either the heart or lungs (or both, and it may very well paralyze the entire body.) Treatment is to put the person on life support until it wears off. As far as I remember it has no other, or only minimal permanent effects on the body, and none on the mind.
If anyone knows what plant I'm talking about (or can suggest similar poisons,) it would be greatly appreciated.
Edit: Solved, I do believe! Thanks for the suggestions and help everyone, and I'm sorry I took so long to get back to you.