Modvigil 200 is the brand name for the 200mg tablet version of the medication modafinil. Patients with narcolepsy and others who have trouble falling asleep are given modafinil prescriptions. It may help those with excessive drowsiness become more alert by altering brain chemicals. There are several off-label uses for modafinil. It improves cognition, memory, and alertness and is widely taken by students the days before and during examinations as well as by employees who are exposed to rigorous deadlines.