What is the recommended dosing frequency for trazodone?

Trazodone Dosing Frequency

For depression, trazodone should be taken once daily at bedtime at doses of 150-300 mg, or divided into 2-3 doses throughout the day if needed, with the total daily dose ranging from 150-400 mg. 1

Dosing Regimens Based on Indication

For Depression (FDA-Approved Use)

• Single nighttime dosing is preferred over divided daily doses, as it provides equal antidepressant efficacy with better tolerability 2, 3
• Start at 150 mg predominantly at bedtime and increase as needed to 200-300 mg for full antidepressant effect 3
• The usual adult daily dose is 150-400 mg, which can be given in two divided doses if necessary 4
• Single nighttime dosing produces less daytime drowsiness at treatment onset compared to multiple daily doses 3

For Off-Label Insomnia Use

Major guidelines recommend AGAINST using trazodone for insomnia treatment. Both the American Academy of Sleep Medicine 5 and the VA/DoD guidelines 6 explicitly advise against trazodone for chronic insomnia disorder based on low-quality evidence showing no differences in sleep efficiency compared to placebo, despite its widespread off-label use.

However, when used off-label for sleep:

• Doses of 25-75 mg demonstrate sedative effects 7
• Studies have used 50-100 mg as a single dose before bedtime, with 100 mg showing better efficacy 8
• The 3-9 hour half-life supports once-daily bedtime dosing 3

Key Clinical Considerations

Timing and Food Interactions

• Take with food when given at night to reduce adverse effects, particularly orthostatic hypotension 9
• Food delays absorption and reduces peak concentration but does not alter total drug exposure 9, 4

Common Pitfalls

• Avoid multiple daily dosing initially - this increases side effects (dry mouth, headache, drowsiness) without improving efficacy 2
• The sedative effects occur at low doses (25-75 mg), while full antidepressant effects require higher doses (150-300 mg) 7
• Tolerance to sedative effects does NOT occur, unlike antihistamines 6

Safety Profile

• Trazodone has few cardiovascular side effects and is safe in overdose compared to tricyclic antidepressants 4
• More frequent adverse effects include blurred vision, somnolence, and sedation 10
• The FDA has not issued the same serious safety warnings for trazodone as it has for nonbenzodiazepine sleep medications regarding complex sleep behaviors 6

Dosing Algorithm

1. For depression: Start 150 mg at bedtime → increase to 200-300 mg as single nighttime dose
2. If daytime sedation problematic after several weeks: Consider splitting into 2 divided doses
3. Maximum daily dose: 400 mg 1, 4
4. Always administer with food when giving evening dose 9