I believe the answer is: Heroin
Heroin is known for its euphoric effect, which make it a really popular recreational drugs even though its usage is heavily regulated. The increase in heart rate happen because heroin stimulate the user's central nervous system to mimic its function during high-adrenaline/exciting situations.
number 17 is the first one......18 is the second one not really sure
Pros- Strong army
cons-if you were a boy you had to leave at a young age to train for the army
