But it's not the same thing. Like cocaine compared to coca leaves, the effect and chemical structure is completely different (haven't tried cocaine though, but chewed the leafs, very nice and calm effect, compared to maybe coffee/green tea with some added feeling of refreshment and oxygen in the blood, but without the overdrive factor).

Chewing coca leafs is healthy and I guess close to impossible to overdose, but if you take a condensed and highly extracted version of that, cocaine, you can very easily overdose.

I heard rumors that in russian prisons people make this condensed coffee drink that acts as a sort of meta-amphetamine replacement. They basically make coffee out of coffee until it's this sticky black thing that gets you really driven, I don't remember what they call it, but I remember many people die from this substance also.

Same thing with natural plant vs chemical extracts. Much easier to overdose and get lethal dosage.