Curare:

It is originally used for arrow poison by many tribes in South America. It has come to be known by many other names: woorari, woorara, curari, cururu, woorali, and many more. Other plants would be mixed with curare helping create the poison that was used on the tips of arrows. After checking for the strength of the mixture (by testing it on different animals) they may now use it as a weapon by shooting the poisoned arrows through blowguns made of hollow bamboo grass. Since curare is too expensive to be made no one used it as a form of weapon in warfares.

Form of anesthesia, although the effects are far more different than that of what surgeons use. Anesthesia allows the muscles and organs to be paralyzed or numb for a certain amount of time depending on the dosage injected into your body. Curare on the other hand slowly paralyzes the voluntary muscles and then the involuntary muscles very slowly and after a while your respiratory system is paralyzed as well disabling your breathing and killing you, all the while you are very aware of everything that is happening and you cannot do anything about it. Although the strange thing about curare is that even when you’ve already died from it your heart is still beating proving that curare has no effect on your heart. Swallowing the plant will not affect you as hazardously as it being injected into your system, but when it is taken in large doses or with an empty stomach you may be facing a very serious problem. But of course, because of its medicinal qualities it has been taken into consideration and been properly studied and calculated on how to use it in operations as an anesthesia for many operations. There has been an antidote formulated so if there are any problems at all curing it will not be too much of a hassle for the doctors.