Modvigil is used to improve wakefulness in people with excessive daytime sleepiness associated with the medical condition known as narcolepsy or with Obstructive Sleep Apnoea/Hypopnoea Syndrome (OSAHS), or shift work sleep disorder (SWSD).
In narcolepsy, there is a sudden and irresistible tendency to fall asleep during normal waking hours. This happens at unpredictable times, even when it is inappropriate or may be unsafe to do so. Vodvigil decreases this unwanted excessive daytime sleepiness.
With OSAHS, daytime sleepiness may occur due to an interrupted night time sleep. Modvigil only treats the symptom of sleepiness and does not treat the cause of OSAHS. Whilst taking Modvigil you should continue with treatments intended to help manage your underlying medical condition, such as Continuous Positive Airway Pressure, unless your doctor tells you otherwise.
If you have been diagnosed with moderate to severe chronic Shift Work Sleep Disorder (SWSD) and non-drug therapies have been unsuitable or unsuccessful, Modvigil may be prescribed to keep you awake during your work shift.
Precisely how Modvigil works is not known, but it is known that it acts on the central nervous system (the brain). It differs from other stimulant medicines that promote wakefulness. Modvigil increases wakefulness.
Your doctor may have prescribed Modvigil for another reason. Ask your doctor if you have any questions about why Modvigil has been prescribed for you.