It's got a fairly short half life so you can't just take 5 at once and expect everything to be gravey.
You need to process it into your system which means taking it like 3-4 times throughout the day until the test.
Lots of juice too.
Hope this helps,
Bob.

__________________
As we live...a life of ease. Everyone of us...has all we need. Sky of Blue...and Sea of Green. In our Yellow Submarine.
Bob's CannabisButter Recipe!
Everything in Moderation...