Halcion 0.125mg is an FDA-approved medication for insomnia. Halcion 0.125mg is available as a generic medication. FDA approval means the medication has undergone rigorous testing by the U.S. Food and Drug Administration to demonstrate its effectiveness and safety for a particular use. It has other variations like Halcion 0.25 mg which has to be guided by a healthcare specialist during treatment. This medication helps you sleep better, and the tablets start working within 30 min after taking. but it should only be used for a short period of time. In addition to sleepiness, this medication can cause side effects like headaches and dizziness. Like other benzodiazepines, Halcion 0.125mg also has other effects and interactions with other medications.