Where does Ketamine come from? Where was it made?

I don’t know if u want us to read a passage that isn’t there or u just want is to know who Ketamine is but I don’t know how to answer. Sorry!

Smoking damages the respiratory system by inhalation of a foreign substance, that is absorbed and residue is left behind on our lungs sponge like substance. the gas that is inhaled also increase your blood pressure and dilates your blood vessels. also the process of inhaling and exhaling the smoke it causes irritation to the throat and mouth. smoking can cause lung cancer and other respiratory and circulatory diseases. 

Lightning would be your answer