Halcion (generic: triazolam) is a prescription medication used for short-term treatment of insomnia (generally 7–10 days). It is not meant to be used by children. Halcion belongs to a group of medications called benzodiazepines and works by decreasing the activity of brain, resulting in a sedative effect.

Halcion comes in a tablet form, and is to be taken once daily by mouth at night just before sleep.

Common side effects of Halcion include headache, lightheadedness, and tingling sensations on the skin.

Halcion can cause drowsiness. Do not drive or operate heavy machinery until you know how this medication will affect you.