How are drugs made?

No.14050930 ViewReplyOriginalReport
>I know that they're made from plants and stuff but how do we predict the effects of a certain drug?
>How do we make antidotes?
>How do we know accurately where a caffeine or a methamphetamine molecule actually goes?
>The body is so complex, how do these pharmaceuticals just do one thing out of so many things?
>How tf does caffeine and theobromine have just a difference of one H molecule but vastly different effects.
Drugs are so complex and important yet I don't see many people talk about it