Do not drink alcohol while taking DAYVIGO. It can increase your chances of getting serious side effects. Do not drive, operate heavy machinery, do anything dangerous, or do other activities that require clear thinking if you take DAYVIGO and have had less than a full night of sleep (at least 7 hours) or if you have taken more DAYVIGO than prescribed by your healthcare provider. You may still feel drowsy the next day after taking DAYVIGO. Do not drive or do other dangerous activities until you feel fully awake.