Half-life
~1.5-5.5 hours.
Withdrawal timeline
Symptoms emerge quickly given the very short half-life.
Rebound insomnia and anxiety peak quickly.
Most patients are through the acute phase within a few weeks.
Common symptoms
- Severe rebound insomnia
- Anxiety
- Tremor
- Sweating
- Irritability
Less common
- Sensory hypersensitivity
Tapering guidance
- Many patients cross-taper from Halcion to a longer-acting benzodiazepine before tapering, given the rapid rebound.
- Plan sleep-support strategies before tapering.
Where ketamine therapy fits
Same considerations as other benzos. Plan sessions at maximum distance from Halcion doses and coordinate with the prescribing physician.
Frequently asked questions
Why is Halcion withdrawal so intense?
The half-life is very short (1.5-5.5 hours), which means serum levels drop rapidly and rebound effects emerge within hours of a missed dose. Cross-tapering to a longer-acting benzo before tapering can smooth the washout.
Important: This page is informational and does not constitute medical advice or a recommendation to start, stop, or change any medication. Tapering psychiatric medications should always be coordinated with the prescribing physician. Compounded ketamine for anxiety, depression, PTSD, and chronic pain is not FDA approved.
Browse all medication withdrawal guides.