Well, you do the cleansing stuff, and it works for that day, or x amount of hours.
So, you'd take it either the day before the test, or a couple hours before the test (depending on what the directions say) and then just don't smoke until afterwards.
Well, no one really lables the shit we smoke around here.
We have the swag which is like 20 for 4.0g, or some dro for $20 for 2.0g.
And then the skunk stuff, but it's really expensive and you can't get it unless you buy ounces, and around here, it's like $550 an oz.
Fuck that.
I grew up being right handed, but over the years, I've been using my left hand for everything.
Except writing... but I think it's just out of habit, and my lack of exercise to train my left hand, haha