Provigil is the brand name for the medication modafinil. It’s a prescription wakefulness-promoting drug used to treat certain sleep disorders and for improving daytime alertness.
What it’s used for (common FDA indications)
- Narcolepsy (excessive daytime sleepiness)
- Obstructive sleep apnea/hypopnea syndrome (often with other sleep therapies)
- Shift work sleep disorder (to stay awake during work shifts)
How it’s taken (typical guidance)
- Narcolepsy or sleep apnea: usually 200 mg once daily in the morning.
- Shift work sleep disorder: about 200 mg about 1 hour before the shift.
- Some people start at 100 mg; the usual maximum is up to 400 mg per day, taken as prescribed.
Common side effects
- Headache, nausea, dizziness, dry mouth
- Insomnia or trouble sleeping, anxiety or nervousness
- Other less common effects: upset stomach, diarrhea, back pain
Serious but rare risks
- Severe skin rash/allergic reaction; seek medical help if you develop a fever, sore throat, or widespread rash
- Chest pain, shortness of breath, high blood pressure
- Mood changes (agitation, anxiety, aggression) in some people
Important safety notes
- May affect how hormonal birth control works; use an extra method of contraception while taking it
- Not a stimulant like an amphetamine, but it can raise blood pressure and heart rate in some people
- Avoid if you’re allergic to modafinil or armodafinil
- Discuss with your doctor before use if you have heart disease, high blood pressure, a history of mental health issues, or you're pregnant or breastfeeding
- Interactions with other medicines are possible; tell your clinician about all meds and supplements you take
If you’d like, tell me:
- what condition you’re asking about (narcolepsy, shift work, sleep apnea, etc.)
- any other meds you’re taking
- whether you’re asking about dosing, side effects, or safety
I can tailor the information to your situation.