Onfi is a prescription medication used to treat seizures associated with Lennox-Gastaut syndrome. Onfi belongs to a group of drugs called benzodiazepines. It works by decreasing the abnormal electrical activity in the brain.
This medication comes in tablet and oral (by mouth) suspension form. It is taken once or twice a day, with or without food.
Common side effects of Onfi include sleepiness, drooling, and constipation.
