Off-label useSee our Amitriptyline safety rating →

Amitriptyline for insomnia (sleep)

Low-dose amitriptyline (often 10-25 mg at bedtime) is widely prescribed off-label to help people fall and stay asleep, because this tricyclic is strongly sedating. But amitriptyline is FDA-approved only for depression, not insomnia, and sleep specialists do not treat it as a go-to sleep aid. Here is what the FDA label, the AASM insomnia guideline, and geriatric safety guidance actually say before you rely on it for sleep.

Is this an FDA-approved use?

No — this is off-label. Off-label means a licensed prescriber may legally prescribe an FDA-approved drug for a use the FDA has not reviewed or approved. Amitriptyline's FDA label reads: 'For the relief of symptoms of depression' - insomnia is not on it. Off-label prescribing is legal and common, but the sleep benefit has not been evaluated or approved by the FDA and is not backed by the trial-and-labeling process that supports its use in depression. FDA-approved: FDA-approved only for the relief of symptoms of depression. The FDA label lists no sleep or insomnia indication, so using amitriptyline as a sleep aid is off-label.

By the pharmaranks editorial teamReviewed against the FDA drug label and specialty clinical guidelines sourcesUpdated Jul 20, 2026How we research

What the evidence actually shows

Amitriptyline is a sedating tricyclic antidepressant - its FDA label describes it as 'an antidepressant with sedative effects' and notes 'a sedative effect may be apparent before the antidepressant effect is noted.' StatPearls calls it 'more sedating' with 'increased anticholinergic properties than other TCAs' and advises giving it 'at night time, as it can lead to sedation.' That sedation is why low doses are used off-label for sleep. The evidence for this use is limited: the American Academy of Sleep Medicine's 2017 pharmacologic-insomnia guideline did not evaluate amitriptyline at all and found little evidence to support sedating antidepressants for chronic insomnia. Of all antidepressants, only low-dose doxepin is suggested (a weak recommendation, for sleep-maintenance insomnia). The AGS Beers Criteria flags amitriptyline as one to avoid in older adults. Cognitive behavioral therapy for insomnia (CBT-I), not a drug, is the recommended first-line treatment for chronic insomnia.

How it's used off-label

When prescribed off-label for sleep, amitriptyline is used at low bedtime doses - commonly around 10-25 mg - far below the 75-150 mg-plus range used for depression, and taken at night because of its sedative effect. There is no FDA-approved dose for insomnia; the exact amount, timing, and duration are decided by your prescriber based on your history and other medicines. Do not start, change, or stop amitriptyline on your own. This is general information, not a dosing recommendation or medical advice.

Risks and cautions

Amitriptyline carries an FDA BOXED WARNING: antidepressants increased the risk of suicidal thinking and behavior in children, adolescents, and young adults (under 25); watch closely for mood or behavior changes, especially early in treatment. It has strong ANTICHOLINERGIC effects - dry mouth, constipation, urinary retention, blurred vision, confusion - and the FDA label notes elderly patients are 'particularly sensitive' to these. The 2023 AGS Beers Criteria classes amitriptyline as 'highly anticholinergic' with a strong recommendation to avoid it in older adults. Other concerns: next-day drowsiness/hangover, weight gain from increased appetite, and cardiac effects (QT prolongation, conduction changes). Critically, tricyclics are dangerous in overdose - StatPearls notes toxicity 'can be serious and even fatal.' Do not combine with alcohol or other sedatives, and do not stop abruptly - stopping suddenly can cause withdrawal symptoms (nausea, headache, low energy). Do not take amitriptyline with, or within 14 days of, a monoamine oxidase inhibitor (MAOI): the FDA label makes this a contraindication, warning that hyperpyretic crises, severe convulsions, and deaths have occurred when tricyclics and MAOIs are combined. The label also states amitriptyline is not recommended during the acute recovery phase after a heart attack.

What’s actually FDA-approved for insomnia (sleep)

If you want FDA-approved help for insomnia: low-dose doxepin (Silenor, 3 mg and 6 mg) is the tricyclic-class drug the FDA actually approved (in 2010) for sleep-maintenance insomnia, and it is the only antidepressant the AASM suggests for sleep. Other FDA-approved options include the 'z-drugs' (zolpidem, eszopiclone, zaleplon), the melatonin-receptor agonist ramelteon, and orexin antagonists such as suvorexant. Per the AASM and the American College of Physicians, cognitive behavioral therapy for insomnia (CBT-I) - not medication - is the recommended first-line treatment for chronic insomnia.

Bottom line

Amitriptyline is genuinely sedating, so low doses are prescribed off-label for sleep - but it is FDA-approved only for depression, carries a boxed suicidality warning for people under 25, and its strong anticholinergic effects make it a poor choice for older adults and a drug sleep specialists do not recommend routinely for insomnia. If you want an FDA-approved sleep medicine, low-dose doxepin is the same-class drug that is actually approved for insomnia, and CBT-I is the recommended first step. Decide with your prescriber, and never adjust or stop it on your own.

Frequently asked questions

Does amitriptyline help you sleep?

Yes - amitriptyline is strongly sedating (from its antihistamine and anticholinergic activity), so low bedtime doses are commonly prescribed off-label to help with sleep. Its FDA label even notes a sedative effect appears before the antidepressant effect. But it is not FDA-approved for insomnia, and major sleep guidelines did not find strong evidence supporting sedating antidepressants for chronic insomnia.

What is the amitriptyline dose for sleep?

There is no FDA-approved insomnia dose. Off-label for sleep, prescribers typically use a low dose - often around 10-25 mg at bedtime - well below the doses used for depression. The right amount, timing, and duration are a prescriber's decision based on your health and other medications. This is general information, not a dosing recommendation.

Is amitriptyline safe for sleep long-term?

Long-term use warrants caution, especially in older adults. Ongoing anticholinergic exposure can cause confusion, memory problems, constipation, and urinary retention, which is why the 2023 AGS Beers Criteria strongly recommends avoiding amitriptyline in older adults. Stopping it suddenly can also cause withdrawal symptoms, so any long-term plan and any taper should be managed by your prescriber.

Amitriptyline vs trazodone for sleep - which is better?

Both are sedating antidepressants used off-label for sleep, and neither is FDA-approved for insomnia. The AASM 2017 guideline recommends against trazodone for insomnia (weak) and did not evaluate amitriptyline; amitriptyline has stronger anticholinergic effects and greater danger in overdose. Neither is a first-line insomnia treatment - CBT-I is, and low-dose doxepin is the FDA-approved antidepressant option.

Does amitriptyline cause weight gain?

Yes. Weight gain, driven by increased appetite, is a well-documented side effect of amitriptyline and other tricyclic antidepressants; MedlinePlus lists 'changes in appetite or weight' among its side effects. Not everyone gains weight, but it is common enough to discuss with your prescriber if it matters to you.

Is amitriptyline addictive?

Amitriptyline is not a controlled substance and is not considered addictive in the usual sense - people do not typically crave it or escalate the dose to get high. However, stopping it suddenly can cause discontinuation symptoms such as nausea, headache, and low energy, so it should be tapered gradually under medical guidance rather than stopped abruptly.

Sources

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This is general reference information, not medical advice. Off-label prescribing is legal and common, but whether a drug is right for you — on-label or off — is a decision for you and a licensed prescriber. Do not start, stop or change a medication based on this page.