What is Provigil (Modafinil) used to treat

Provigil is a prescription medicine used to treat the symptoms of excessive sleepiness caused by obstructive sleep apnea, narcolepsy and shift work sleep disorder. Provigil may be used alone or with other medications. Provigil belongs to a class of drugs called stimulants.


Modafinil (Generic Provigil, Alertec, Modalert) is an analeptic drug for the treatment of narcolepsy, shift work sleep disorder, jet-lag, obstructive sleep apnea/hyponea and excessive daytime sleepiness associated with obstructive sleep apnea. 

How to take

Take this medication by mouth with or without food, usually once daily in the morning or as directed by your doctor. Dosage is based on your medical condition and response to therapy. Do not take it in larger amounts or for longer than recommended. Use this medication exactly as prescribed to get the most benefit from it. 

Side effects

Check with your doctor if any of these most common side effects persist or become bothersome:

  • headache;
  • infection;
  • nausea, decreased appetite, diarrhea;
  • chills;
  • dry mouth;
  • runny nose;
  • sore throat;
  • nervousness;
  • anxiety;
  • dizziness;
  • insomnia;
  • depression;
  • numbness and tingling.

These are some of the more uncommon but serious side effects. Stop taking modalert and seek emergency medical attention or contact your doctor immediately should they occur:

  • an allergic reaction (difficulty breathing; closing of the throat; swelling of the lips, tongue, or face; or hives);
  • irregular heartbeats;
  • low or high blood pressure; shortness of breath.

Modalert may be habit forming. You should discuss the abuse and dependence potential of modalert with your doctor.

Do not stop taking Modalert without first talking to your doctor. Your doctor may want to gradually lower the dose of the medication before stopping treatment.

Side effects other than those listed here may also occur. Talk to your doctor about any side effect that seems unusual or that is especially bothersome. 

Missed dose

Take the missed dose as soon as you remember as directed by your doctor. A missed dose taken late in the waking day may cause insomnia. If you don’t remember until it is almost time for the next dose, skip the missed dose and take only the next regularly scheduled dose. Do not take a double dose of this medication unless otherwise directed by your doctor.


Store at room temperature between 68-77 degrees F (20-25 degrees C) away from light and moisture. Do not store in the bathroom. Keep all medicines away from children and pets.