What is armodafinil used for?

Armodafinil is a prescription wakefulness‑promoting medicine (the R-enantiomer of modafinil).

Approved uses (in adults):
- Narcolepsy
- Obstructive sleep apnea/hypopnea syndrome (OSAHS)
- Shift work sleep disorder (SWSD)

What it does: helps people stay awake and alert during the day and may improve daytime functioning.

How it’s taken: usually once daily in the morning for narcolepsy/OSAHS, or about 1 hour before a night shift for SWSD. Doses commonly are 150 mg or 250 mg, but the exact dose is decided by a clinician.

Notes:
- Not approved for children.
- Some people may experience side effects (e.g., headache, nausea) and there are rare risks like severe skin reactions.
- It can interact with other medicines and may affect hormonal contraceptives; discuss all meds with your doctor.

If you’re considering armodafinil, talk to your healthcare provider to see if it’s appropriate for you. This is general information and not medical advice.