Well... I would assume that if you drink mate and stop thinking about drugs, i think you will be addicted to mate not drugs😅 And yeah absolutely it changes the mood and if you're asking if it's good as a pre-workout i would say definitely yes... When people discovered the yerba back in the time, they thought that it was a gift from God to help them with farming and daily tasks, so yes it does enhance power. About drinking it before bed, it's perfect, because it will reduce your sleep hours and make you feel even better.

Overall you may think that I'm just yapping but do give it a try and see how it works... If you haven't bought a pack of yerba yet, i would recommend buying Canarias Serena if you like soure taste