Adrafinil is a benzhydryl sulfinyl compound and the testing of this compound discovered Modvigil 200mg Online and Adrafinil are very similar compounds on a molecular structure level; the only difference in structure is that Modvigil has a hydroxyl group whereas Adrafinil has its terminal amide. Adrafinil is metabolized in the liver to produce Modvigil in our body. During testing, it was determined that Modvigil is the primary active component of Adrafinil. Adrafinil and Modvigil both are classified as eugeroic compounds. They have wakefulness promoting effects and stimulating effects. They are not related to amphetamine-based stimulants and have different mechanisms of action in the body.