Trazodone for Sleep: Uses, Dosage, Side Effects, and How It Works
Trazodone is an antidepressant that is FDA-approved for depression but is one of the most commonly prescribed medications for sleep. At low doses, usually 25 to 100 mg at bedtime, it causes drowsiness by blocking histamine and certain serotonin receptors. It can help you fall asleep faster and stay asleep longer, it isn’t a controlled substance, and it isn’t considered habit-forming. It’s also an off-label use with modest evidence behind it, which is why it works best as one part of a sleep plan rather than the whole plan.
Below is what trazodone is used for, what the research actually shows for insomnia, how it’s dosed, and the safety issues worth knowing before your first night.
Serotonin antagonist and reuptake inhibitor (SARI); brand name Desyrel
25–100 mg at bedtime
About 30–60 minutes
No. Can be prescribed by telehealth
What Is Trazodone Used For?
Trazodone has been on the market since the early 1980s. Its uses fall into two groups:
FDA-approved use
- Major depressive disorder. This is trazodone’s only FDA-approved indication. Antidepressant doses are much higher than sleep doses, typically 150 mg a day or more, divided or at bedtime.
Common off-label uses
- Insomnia. By far its most common use today, usually at low doses.
- Insomnia alongside depression or anxiety. Often added at bedtime to an SSRI or SNRI, which can disrupt sleep on their own.
- PTSD-related nightmares and sleep disruption, usually after first-line options have been tried.
- Anxiety, occasionally, when other options aren’t a good fit.
- Sleep problems in people who should avoid habit-forming sleep aids, such as those with a history of substance use.
Off-label prescribing is legal and common. It means the prescriber is relying on clinical evidence and experience rather than a labeled indication.
How Does Trazodone Work for Sleep?
Trazodone does different things at different doses, which explains why a sleep dose and a depression dose behave so differently.
- At low doses, it mainly blocks histamine (H1) receptors, serotonin 5-HT2A receptors, and alpha-1 adrenergic receptors. Together these cause drowsiness and can deepen sleep.
- At higher doses, it also blocks serotonin reuptake, which is where the antidepressant effect comes from.
Unlike many antidepressants that can fragment sleep, trazodone tends to increase deep (slow-wave) sleep. That’s one reason it’s often paired with an SSRI at bedtime.
Does Trazodone Work for Insomnia? What the Evidence Shows
The honest answer is that it helps some people, the effect is moderate, and the research is weaker than its popularity suggests.
- Benefit: A 2022 systematic review and meta-analysis in Scientific Reports (Zheng et al.) pooled 11 randomized trials with 466 participants with insomnia. Trazodone increased total sleep time by about 40 minutes, shortened the time to fall asleep by about 19 minutes, reduced time awake during the night, and increased deep sleep. Daytime drowsiness was more common with trazodone, and the evidence quality ranged from very low to moderate.
- Guidelines: The American Academy of Sleep Medicine’s 2017 clinical practice guideline made a weak recommendation against trazodone for chronic insomnia, citing small benefits relative to possible harms and limited high-quality studies.
- First-line treatment: Cognitive behavioral therapy for insomnia (CBT-I) is recommended before any sleep medication. Its benefits tend to last after treatment ends, while medication benefits generally last only as long as you take it.
In practice, trazodone is often a reasonable choice when insomnia comes with depression or anxiety, when someone needs a non-habit-forming option, or as a short-term bridge while CBT-I takes hold. It’s less compelling as a long-term fix for insomnia on its own.
Trazodone Dosage for Sleep
Because insomnia is an off-label use, there’s no official sleep dose on the label. The ranges below reflect common practice, not a recommendation for you.
| Use | Commonly used dose | Timing |
|---|---|---|
| Insomnia | 25–100 mg; often started at 25–50 mg | 30–60 minutes before bed |
| Older adults | Lower starting doses, increased cautiously | At bedtime |
| Depression (FDA-approved) | Typically 150 mg/day or more, adjusted by the prescriber | Divided doses or at bedtime |
Practical tips:
- Take it only when you can stay in bed 7 to 8 hours. With a half-life of roughly 5 to 9 hours, a late dose often means a groggy morning.
- Start low. Many people sleep well on 25 to 50 mg. Going above 100 mg usually adds side effects more than sleep.
- Get up slowly at night. Trazodone can drop your blood pressure when you stand, which raises the risk of dizziness and falls.
- Pair it with sleep habits that work: a consistent wake time, no screens in bed, and getting out of bed if you can’t sleep.
How Long Does Trazodone Take to Work?
For sleep, most people feel drowsy within 30 to 60 minutes of a dose, and the effect is usually noticeable the first night. Blood levels peak about an hour after taking it on an empty stomach; food can slow that down a little.
For depression, it’s different. Like other antidepressants, the mood benefit typically builds over several weeks at a full antidepressant dose.
Trazodone Side Effects
At sleep doses, side effects are usually mild. The most common include:
- Morning grogginess or a “hungover” feeling
- Dizziness or lightheadedness, especially when standing
- Dry mouth
- Headache
- Nausea
- Stuffy nose or blurred vision
Serious but less common risks
- Priapism. A painful erection lasting more than four hours is a medical emergency. It’s rare, but go to the ER immediately if it happens.
- Heart rhythm changes (QT prolongation). The risk is higher with existing heart disease or other QT-prolonging medicines.
- Fainting or falls from low blood pressure on standing, particularly in older adults.
- Serotonin syndrome when combined with other serotonergic drugs. Watch for agitation, fever, rapid heartbeat, sweating, and muscle twitching.
- Suicidal thoughts. Like all antidepressants, trazodone carries an FDA boxed warning about increased suicidal thoughts and behaviors in children, teens, and young adults, especially when starting or changing doses.
Who Should Be Careful With Trazodone
Tell your prescriber if any of these apply:
- Heart rhythm problems or a personal or family history of long QT
- Taking an MAOI now or within the past two weeks. This combination is contraindicated.
- Other serotonergic medicines, such as SSRIs, SNRIs, triptans, tramadol, or St. John’s wort. These are often combined safely, but your prescriber should know.
- Medicines that affect the liver enzyme CYP3A4, such as certain antifungals, HIV medicines, clarithromycin, or carbamazepine, which can raise or lower trazodone levels
- Bipolar disorder, since antidepressants can trigger mania
- Liver or kidney disease
- Age 65 or older, because of a higher risk of dizziness and falls
- Pregnancy or breastfeeding
- Sleep apnea symptoms, like loud snoring or gasping, which should be evaluated rather than covered up with a sleep aid
Trazodone and alcohol
Don’t combine them. Alcohol adds to trazodone’s sedation and can worsen dizziness, falls, slowed breathing, and impaired judgment.
Stopping trazodone
Trazodone isn’t addictive, but if you’ve taken it nightly for a while, stopping suddenly can bring rebound insomnia and symptoms like irritability or nausea. Taper with your prescriber.
Trazodone vs. Other Sleep Medications
| Medication | FDA-approved for insomnia? | Controlled? | Key point |
|---|---|---|---|
| Trazodone | No (off-label) | No | Useful when insomnia comes with depression or anxiety; not habit-forming |
| Zolpidem (Ambien) | Yes | Yes | Effective but carries dependence risk and complex sleep behaviors |
| Low-dose doxepin (Silenor) | Yes, for staying asleep | No | Very low dose; targets middle-of-the-night waking |
| Ramelteon (Rozerem) | Yes, for falling asleep | No | Melatonin-receptor medicine with mild effect |
| Hydroxyzine | No (approved for anxiety) | No | Sedating antihistamine, helpful when anxiety keeps you awake |
| Melatonin | Supplement | No | Best for timing issues like jet lag or a delayed sleep schedule |
Trazodone vs. Ambien: Ambien is FDA-approved for insomnia and often works more reliably for falling asleep, but it’s a controlled substance with dependence risk and reports of sleepwalking and other complex sleep behaviors. Trazodone isn’t controlled and is often preferred when someone also has depression or a history of substance use.
Trazodone vs. melatonin: Melatonin mostly shifts your body clock rather than sedating you. It’s a better fit for jet lag or a late sleep schedule than for chronic insomnia.
How We Approach Trazodone at Samz Mental Health
Insomnia is often a symptom of something else, like anxiety, depression, PTSD, or a sleep schedule that’s drifted. So we look for the cause before choosing a medication. During your evaluation, your provider will:
- Find what’s driving the insomnia, including mood, anxiety, trauma, substances, and sleep habits
- Screen for safety, including heart history, current medications, and signs of sleep apnea that need a different workup
- Build CBT-I strategies into your plan, so medication isn’t the only tool
- Choose the right medication, if any, whether that’s trazodone or a better-matched alternative, at the lowest effective dose
- Follow up to adjust, and to plan a taper when you’re sleeping well, through ongoing medication management
Learn more about our online insomnia treatment, or read what causes insomnia.
Can You Get Trazodone Prescribed Online?
Yes. Trazodone isn’t a controlled substance, so a licensed prescriber can prescribe it after a telehealth evaluation when it’s clinically appropriate. Samz Mental Health offers video visits for adults physically located in Texas, New York, Florida, Colorado, Washington, Maryland, New Hampshire, New Mexico, and Iowa. If medication is appropriate, your prescription is sent electronically to your local pharmacy.
In-network with Aetna, Cigna, UnitedHealthcare, Optum, and Carelon Behavioral Health. See insurance details. Need to be seen soon? We offer same-day psychiatrist appointments.
Frequently Asked Questions About Trazodone
What is trazodone used for?
It’s FDA-approved for major depressive disorder. At lower doses it’s widely prescribed off-label for insomnia, and it’s sometimes used for anxiety, PTSD-related nightmares, and sleep problems that come with depression.
Is trazodone good for sleep?
It helps many people fall asleep faster and stay asleep longer, but the evidence is modest and sleep-medicine guidelines don’t recommend it as routine treatment for chronic insomnia. It works best alongside CBT-I and treatment of whatever is driving the sleep problem.
What is the usual trazodone dose for sleep?
Commonly 25 to 100 mg at bedtime, often starting at 25 to 50 mg. That’s far lower than antidepressant doses. Your prescriber decides based on your age, medications, and response.
How long does it take for trazodone to work for sleep?
Usually 30 to 60 minutes. Because it lasts several hours, take it only when you can sleep a full night.
Is trazodone addictive?
No. It isn’t a controlled substance. If you’ve used it nightly, taper with your prescriber to avoid rebound insomnia.
What are the most common side effects of trazodone?
Morning grogginess, dizziness, dry mouth, headache, and nausea. Rare but serious risks include fainting, heart rhythm changes, serotonin syndrome, and priapism.
Can I drink alcohol with trazodone?
No. Alcohol adds to the sedation and raises the risk of dizziness, falls, and slowed breathing.
Can I get trazodone prescribed online?
Yes, if a licensed prescriber decides it’s appropriate after an evaluation. Samz Mental Health sees patients by video in nine states, and prescriptions go to your local pharmacy.
Get Help Sleeping Again
Book a video evaluation with a board-certified psychiatric nurse practitioner. Same-day appointments available. No referral needed.
References
- Zheng Y, Lv T, Wu J, et al. Trazodone changed the polysomnographic sleep architecture in insomnia disorder: a systematic review and meta-analysis. Scientific Reports. 2022;12. Full text
- Sateia MJ, et al. Clinical practice guideline for the pharmacologic treatment of chronic insomnia in adults. Journal of Clinical Sleep Medicine. 2017;13(2):307–349.
- Shin JJ, Saadabadi A. Trazodone. StatPearls. NCBI Bookshelf. Link
Medical disclaimer: This page is for education and is not a substitute for a personal medical evaluation. Don’t start, stop, or change any medication without talking to your prescriber. If you’re in crisis or thinking about harming yourself, call or text 988 (Suicide & Crisis Lifeline) or call 911.