Curare notably functions to inhibit nicotinic acetylcholine receptors at the neuromuscular junction. The victim remains conscious and alert in a manner similar to curare or pancuronium bromide. The various components of curare are organic compounds classified as either isoquinoline or indole alkaloids. The toxicity of curare alkaloids in humans has not been established. In addition, the discovery of muscle relaxants such as curare allowed for safer applications. These cause paralysis upon ingestion, much like curare. Waterton is credited with bringing the anaesthetic agent curare wourali to Europe. Drugs that interfere with nerve function, such as curare, can also cause paralysis. Sid Taylor stated that Cameron used curare to immobilise his patients during his research. The Piaroa are known for making "curare" to impregnate the darts of their blowguns. The word "curare" comes from the South American Native name for the arrow poison, "ourare". This results, systemically, in a flaccid paralysis, an action similar to that of curare. They also produce their own "curare". Waterton is also credited with bringing curare to Europe. Once they were given curare again, the response returned.