Agree with above post. Also, I wouldn’t recommend taking it as a "pre-workout" as it is known to make you drowsy/sleepy. I thought the same thing way back when and it was no bueno lol. I would take it first thing in the morning, or some like to split doses (if in the 80mcg or higher phase), but I find the later I take the harder it is for me to get to sleep as well.
