The major component of Sweet Flag is asarone, which can be purified into the amphetamine TMA-2. In his book ‘Pihkal’ Dr. Shulgin describes TMA-2 as comparable to mescaline, though without the colour-intensification.
For a clear, uplifting effect: mix 1 tablespoon in a cup of hot water and drink this on an empty stomach. For a stimulating effect: soak 20 grams of the root for a while and then boil it for a couple of minutes in half a litre of water. Strain and drink a couple of cups. For a mind-expanding effect: raise the dosage as required.