- Wide range of choices (half-life, side effects)
- All affect non-GABA neurotransmitters (muscarinic, histaminergic, serotoninergic blockade)
- Dosing for insomnia typically is lower than dosing as an antidepressant
| - Many have significant safety concerns; risk:benefit ratio
- Very few data on efficacy for insomnia
- Some have sleep-disrupting effects
- Most suppress REM; rebound may lead to nightmares
- May exacerbate RLS/PLMD
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