The 150 mg strength refers to the amount of armodafinil in a prescribed dose, subject to product verification. The appropriate dose and timing depend on the diagnosed condition and the prescriber's instructions. Taking more than prescribed does not guarantee better wakefulness and may increase the risk of adverse effects. Patients should not change their dose, share their medicine, or stop treatment without appropriate advice. A pharmacist or doctor can clarify the medicine's directions and confirm that the product is suitable.