I only drink this one when I am having trouble falling asleep. 8 times out of 10 it works. I usually begin to feel drowsy within ½ an hour of drinking it and if I am still up an hour after the tea is gone, I cannot focus and feel pretty dopey. It has a great smooth flavour. I really enjoy the minty after taste. However, if I drink this tea more than two nights in a row I wake up with a headache the following morning.