Medication Guide
A patient guide to Trazodone, a Serotonin modulator (SARI) antidepressant — how it helps, what it treats, how to take it, and side effects to know about.
Trazodone is a serotonin antagonist and reuptake inhibitor (SARI) originally approved for depression. At the low doses most commonly prescribed today, it acts as a gentle, non-habit-forming sleep aid, helping patients fall asleep and stay asleep without the dependence risks of traditional sleeping pills. At higher doses it functions as a full antidepressant, though newer medications are usually preferred for that role.
For sleep, benefits are typically felt the first night or within a few nights. When used for depression, improvement follows the usual antidepressant timeline of 4 to 8 weeks. Because it does not cause tolerance or cravings, trazodone can be used nightly over the long term under your prescriber's supervision, and it pairs well with daytime antidepressants that disturb sleep.
For sleep, trazodone is typically prescribed at 25 to 100 mg taken about 30 to 60 minutes before bedtime. For depression, doses are higher — typically starting around 150 mg per day in divided doses, with a usual range up to 400 mg daily. Taking it with a light snack can improve absorption; avoid taking it so late that fewer than 7 to 8 hours of sleep remain, or morning grogginess is likely.
If you miss a bedtime dose, simply skip it and resume the next night — do not take it in the middle of the night or double up. Even when used for sleep, do not stop trazodone abruptly if you have been taking it regularly; check with your prescriber, who may recommend a brief taper. Always follow your prescriber's instructions for dose and timing.
The only way to know whether Trazodone — or any medication — fits your symptoms, history, and goals is a thorough evaluation with a qualified prescriber. Harpal Singh, PMHNP-BC provides comprehensive psychiatric evaluations and ongoing medication management by telehealth across California.
Good to know
No. Unlike benzodiazepines and 'Z-drugs' such as zolpidem, trazodone does not cause tolerance, cravings, or dependence. This is the main reason prescribers favor it for patients who need ongoing help with sleep.
At low doses, trazodone's sedating properties dominate while its antidepressant effects are minimal, making it effectively a sleep medication. This off-label use is extremely common and well established in clinical practice.
Priapism is a prolonged, painful erection unrelated to sexual activity, caused by trazodone's effect on blood vessels. It is rare but is a medical emergency — go to an emergency department if an erection lasts more than 4 hours. Men with sickle cell disease or similar conditions should discuss this risk before starting.
Trazodone can lower blood pressure briefly when you change position, especially at night. Rise slowly from bed, sit at the edge for a moment first, and use night lights. If dizziness is significant or you fall, contact your prescriber.
Often yes — low-dose trazodone at bedtime is commonly paired with an SSRI or SNRI taken in the morning. Because both affect serotonin, your prescriber will confirm the combination is appropriate and review symptoms of serotonin syndrome to watch for.
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