Trazodone for Sleep: Uses, Dosage and Side Effects

Why prescribers reach for it so often

Trazodone was developed to treat depression, but at the lower doses used for sleep it acts mainly as a sedative. Prescribers choose it for insomnia especially when someone also has depression or anxiety, or when they want to avoid the dependence risk that comes with benzodiazepines and the so-called Z-drugs.

The scale of this habit is striking. Trazodone was the 21st most-prescribed medication in the United States in 2023, with about 24.7 million prescriptions filled for roughly 5.6 million patients, according to the ClinCalc DrugStats database. Newer antidepressants long ago replaced it as a first choice for depression, so that volume reflects how routinely it gets used off-label as a sleep aid. Off-label means the FDA has not approved it specifically for insomnia, a point worth keeping in mind when weighing it against drugs that were tested and approved for sleep.

How a low dose makes you drowsy

Trazodone belongs to a class called serotonin antagonist and reuptake inhibitors. Its sedating effect comes from blocking several receptors at once: it antagonizes certain serotonin (5-HT2A) receptors, blocks histamine H1 receptors much like a sedating antihistamine, and blocks some alpha-1 adrenergic receptors.

That combination quiets the systems that keep you alert, typically within about 30 minutes, which is why it is taken shortly before bed. Oddly, the higher doses needed to treat depression are less reliably sedating for some people. More is not better for sleep.

Dosage for sleep: your prescriber decides

For sleep, trazodone is usually prescribed in a low range, commonly 25 to 100 mg taken about 30 minutes before bedtime. When it treats depression, doses run much higher, often 150 mg or more per day and sometimes up to 400 mg for outpatients.

These figures are reference points, not instructions. Your prescriber sets your dose based on your age, other medications, medical conditions, and how you respond, and will generally start low to limit next-day grogginess. Do not adjust your own dose or take extra if you cannot sleep.

• Typical off-label sleep dose: about 25 to 100 mg at bedtime
• Antidepressant dose: much higher, often 150 mg or more daily
• Timing: usually about 30 minutes before bed
• Principle: lowest effective dose, adjusted by your prescriber

Does it actually work? What the evidence says

The research is thinner than trazodone's popularity suggests. In its 2017 clinical practice guideline on drugs for chronic insomnia, the American Academy of Sleep Medicine suggested that clinicians not use trazodone for either falling asleep or staying asleep, a conditional recommendation reflecting weak evidence, noting that data supporting sedating antidepressants for insomnia are scant. That does not mean it never helps; plenty of patients and prescribers report real benefit, particularly when insomnia travels with depression or anxiety. It means the trials to back up the practice are limited.

For chronic insomnia, cognitive behavioral therapy for insomnia (CBT-I) is the recommended first-line treatment, because it targets the causes of poor sleep and its benefits persist after treatment ends. Medication usually works best as a shorter-term bridge while CBT-I or treatment of an underlying condition takes hold.

Side effects

The most common side effect is drowsiness, which is the point at bedtime but can linger into the next morning as a groggy, hungover feeling, especially at higher doses. Because trazodone can lower blood pressure when you stand up (orthostatic hypotension), it can cause dizziness and raise the risk of falls, particularly in older adults getting up at night.

Other reported effects include dry mouth, blurred vision, headache, nausea or other stomach upset, and changes in weight. Most are mild, but tell your prescriber if they persist.

• Common: next-day drowsiness, dizziness, dry mouth, blurred vision, headache, stomach upset
• Cardiovascular: low blood pressure on standing, and rarely irregular heart rhythm
• Report anything that persists, worsens, or interferes with daily function

Important warnings

Trazodone carries an FDA boxed warning shared by antidepressants: it can increase the risk of suicidal thoughts and behaviors in children, teens, and young adults up to age 24, especially early in treatment or after a dose change. Anyone starting it, and their family, should watch for worsening mood, agitation, or new suicidal thoughts and contact the prescriber right away. If you are in crisis, call or text 988, the Suicide & Crisis Lifeline.

A rare but genuine emergency is priapism, a painful erection lasting more than a few hours. It requires immediate medical care to prevent lasting damage, so do not wait it out. Trazodone can also, rarely, contribute to serotonin syndrome when combined with other serotonergic drugs, causing agitation, rapid heart rate, high temperature, and muscle rigidity.

Do not combine trazodone with alcohol, which adds to its sedation. Tell your prescriber about everything you take, since combining it with other serotonergic drugs, certain heart medications, or strong sedatives can be risky.

Trazodone vs sleeping pills and benzodiazepines

A key reason trazodone is popular for sleep is what it is not. Unlike benzodiazepines such as lorazepam or Z-drugs such as zolpidem, trazodone is not a controlled substance and is not considered habit-forming in the same way, so it does not carry the same risk of tolerance and physical dependence.

It is not risk-free, though, and stopping it, especially after longer use at higher doses, is best done gradually to avoid discontinuation symptoms. Whether trazodone, another medication, or a non-drug approach fits you depends on your overall health and what is driving your insomnia. A therapist trained in CBT-I can also treat chronic insomnia directly.

Using it well, and what to ask your prescriber

If you and your prescriber decide trazodone is a fit, a few habits help. Take it about half an hour before bed on a consistent schedule, and give yourself a full night's window; taking it too late is a common cause of next-morning grogginess. Rise slowly in the morning to avoid the dizziness that can come from its blood-pressure effect. Medication also works better alongside solid sleep habits than in place of them: a steady wake time seven days a week, morning light, limited caffeine and alcohol, and reserving the bed for sleep. Sleeplessness that stems from untreated depression, anxiety, chronic pain, or a circadian rhythm problem often improves most when that underlying issue is treated directly.

The appointment itself goes further if you arrive with specific questions. A few worth asking:

• How long do you expect me to take this, and when will we reassess whether it is still needed?
• Should I try CBT-I alongside the medication, or instead of it?
• Which of my current medications or supplements could interact with trazodone?
• If I still cannot sleep after taking my dose, what should I do, and what should I avoid doing?
• If I feel groggy in the mornings, will we lower the dose or change the timing?