Trazodone is the most widely prescribed off-label sleep medication despite being FDA-approved as antidepressant. Trazodone for sleep uses low doses (25-100 mg) that produce sedation without antidepressant effects.
How it works
At low doses, trazodone blocks histamine and serotonin 5-HT2A receptors causing sedation. Higher doses (150-400 mg) primarily block serotonin reuptake for antidepressant effect.
Why it’s so widely used
- Not controlled substance
- Not classically addictive
- Can use long-term
- Cheap (generic)
- Effective for many patients
- Can use for both insomnia and depression
Limitations
- Limited rigorous sleep-specific evidence despite widespread use
- Side effects from off-target receptor effects
- Not FDA-approved for insomnia
- Off-label use means less data on optimal dosing for sleep
Dosing
- Sleep doses: 25-100 mg
- Start low (25-50 mg)
- Titrate up if needed
- Take 30-60 minutes before bed
Side effects
- Daytime sedation/grogginess
- Dry mouth
- Dizziness, orthostatic hypotension (falls risk)
- Headache
- Priapism (rare but serious in men)
- Cardiac effects (rare arrhythmias)
Cautions
- Caution in elderly (orthostatic hypotension, falls)
- QT prolongation potential
- Drug interactions (other serotonergic medications)
- Pregnancy: limited data but generally considered acceptable
Frequently Asked Questions
Is trazodone safer than Ambien?
Less dependence concern. Different side effects.
Can I take trazodone long-term?
Common practice. Less risk than chronic Z-drug use.
Why is trazodone used for sleep if it’s an antidepressant?
Sedating side effect at low doses.
Will trazodone help my depression?
At low sleep doses, no antidepressant effect. Higher doses for depression.
Can I become dependent on trazodone?
Not in classical sense. Some patients find sleep deteriorates briefly when stopped.
The bottom line on trazodone for sleep
Most prescribed off-label sleep medication. Generally well-tolerated. Limited rigorous evidence but widespread use suggests practical effectiveness for many.