Can legal drugs be harmful?

Yes. Of course. Anything can be dangerous if used improperly. Electricity, gas, matches. Guns. Etc.

Yes, Yes , Yes I knew of one person who had to have a heart transplant because of his medication. And many others who are subject to heat frustration or heat stress to the point of passing out amongst others which require you to decrease your dosage slowly and not abruptly your pharmacist should be telling you about a number of things but by the time you hear it you may feel safer not doing anything which could then cause a real problem.

Extremely... I would HIGHLY advise that you do NOT use them, as over dosage can be very easy. Drugs, no matter what type, legal or not, are irrelevant and have no purpose when they do nothing but shorten your life, unless you would be referring to over the counter drugs... But still, any medication that you don't need is terribly unnecessary.

because those drugs do not impact large company. Marijuana and hemp impact damn close to each and every large company market in this usa. And once you stay in a rustic that caters to important company, you stay below their guidelines.

of course even if you take to much ib profin you will die of stomach bleeding

if not taken as perscribed, yes

yes, they call them side effects.

they can also be abused.