Have you ever heard of or taken a legal herb or legal pill like this?

Salvia

Kratom, Kava, Valerian, 5-HTP… do you want me to keep going?

@bookish1 you mean take these in high doses? I meant an herb that affects you in low doses. I want no headache or nausea!

What type of experience are you looking for? As @bookish1 alluded to there is a whole bunch of herbs that alter perception and are legal.
I recently learned even myrrh is psychotropic (even transdermally)

@Aster: Depends on how sensitive you are. Also, set and setting. You can prepare yourself for side effects, but you can’t definitively preclude them. People get headaches and nausea even from low doses of caffeine or alcohol. Every body is different.

If there are any in particular that you’re interested and want to do a little research I suggest you check out erowid.org . Its a vast wealth of information and peoples experiences. I like it over other sites because it’s not biased. If something is dangerous or has side effects, it’s all on there.