Trazodone

What is it?

Composition

Active ingredient: trazodone (commonly as trazodone hydrochloride) in film‑coated tablets. Excipients vary by manufacturer and may include fillers, binders, disintegrants, and coating agents such as lactose, cellulose, starches, silica, and magnesium stearate.

How to use?

A common starting point used by many prescribers for depression is 150 mg per day in divided doses, then gradual titration based on response and tolerability. Taking the dose after food can reduce stomach upset.

How does it work?

• Route: oral (tablets).
• Major depressive disorder: start 50–100 mg/day in 2–3 doses after meals; increase by 50 mg/day every 3–4 days as needed. Usual effective dose 150–300 mg/day; maximum 400 mg/day (outpatient) or 600 mg/day (inpatient).
• Insomnia (off‑label): 25–100 mg once daily at bedtime; take after a light snack or after the evening meal if stomach upset occurs.
• Timing: if taking multiple daily doses, take the largest dose at bedtime to reduce daytime drowsiness.
• Duration: assess response after 2–4 weeks for depression; continue as directed for maintenance. For stopping, taper over 1–2 weeks (or longer if on higher doses) rather than abrupt discontinuation.

Indications

For depression, trazodone is used to reduce low mood, anxious distress, and disturbed sleep that can keep depression “locked in.” For sleep issues, it’s widely used off‑label because it tends to shorten the time it takes to fall asleep and reduce night awakenings for some patients.

Sleep can improve faster than mood.
Mood change is usually slower.

In clinic, prescribers often pick trazodone when insomnia is a big driver of daytime symptoms, because improving sleep continuity can make psychotherapy and daytime routines easier to stick with. The trade‑off is sedation, which can be strong in the first week.

Comparison

Trazodone differs from SSRIs and SNRIs because it is a SARI, with meaningful receptor‑blocking effects that many SSRIs do not have. This is why sedation is more common, and why some people experience fewer sexual side effects than they did on an SSRI or SNRI. The downside is that the “sleepy” effect can be too strong for a subset of patients, and dizziness can be more noticeable.

Clinically, SSRIs/SNRIs are often chosen first for anxiety disorders because they’re less sedating for many people, while trazodone is often chosen when insomnia is a central complaint or when sexual side effects on SSRIs became a deal‑breaker. The best fit depends on symptom profile, co‑medications, and cardiac risk.

Contraindications

Some situations rule trazodone out completely; others mean it needs close supervision. The hard contraindications and serious cautions a prescriber checks first:

• Hypersensitivity to trazodone or any tablet excipient.
• MAO inhibitors taken together, or within 14 days of stopping an MAOI. Combining the two can trigger serotonin syndrome.
• Other serotonergic medicines (SSRIs, SNRIs, triptans, tramadol, lithium, St John's wort) raise the risk of serotonin syndrome and need careful review, not casual co-prescribing.
• QT prolongation or arrhythmias: known long QT, a recent cardiac rhythm disturbance, or other QT-prolonging drugs. Trazodone can lengthen the QT interval.
• Recent myocardial infarction: avoid or use only with caution during early recovery from a heart attack.
• Priapism risk: rare but serious, a prolonged painful erection is a medical emergency and a reason some men should not use it without discussion.
• Severe hepatic impairment: the liver clears trazodone, so significant liver failure changes how safely it can be used.
• Alcohol: heavy or concurrent drinking deepens sedation and is not compatible with safe use.

This is NOT for you if:

• You take, or recently stopped, an MAOI antidepressant within the last two weeks.
• You have had an allergic reaction to trazodone before.
• You have a heart rhythm problem, a long QT interval, or had a heart attack very recently.
• You are already on another medicine that raises serotonin and a doctor has not reviewed the combination.
• You have serious liver disease.
• You drink alcohol heavily or do not plan to limit it during treatment.

Not recommended for

Use extra caution if you have liver or kidney disease, a history of seizures, or heart conditions (including rhythm problems). It can interact with other medicines that increase serotonin (risk of serotonin syndrome), with sedatives that add drowsiness, and with drugs that affect heart rhythm (QT prolongation risk in vulnerable people). For people taking blood thinners or antiplatelet medicines, clinicians also consider bleeding risk when adding serotonergic antidepressants.

Side effects

The most common side effects reported in everyday use include:

• Drowsiness or feeling slowed down (often strongest in the first days)
• Dizziness or light‑headedness, especially when standing up quickly
• Dry mouth
• Headache
• Mild nausea
• Constipation or blurred vision in some patients

Alcohol can worsen sedation.

A rare but urgent side effect is priapism (a prolonged, painful erection). It is uncommon, but it is treated as a medical emergency because delayed care can cause permanent harm. Another safety area clinicians watch is heart rhythm in susceptible patients, since trazodone can affect cardiac conduction in some situations. ^[4]

Common mistakes

Small, avoidable mistakes account for a lot of “trazodone didn’t work for me” stories.

• Taking it too late in the evening: people then feel hungover the next morning and blame the medicine rather than the timing.
• Standing up quickly at night: dizziness is often worst when getting up from bed to the bathroom.
• Mixing with sedatives without planning: combining with benzodiazepines, strong antihistamines, or opioid pain medicines can produce heavy sedation and falls.
• Stopping abruptly after regular use: some people get rebound insomnia, irritability, or flu‑like discomfort, then assume the depression is back.
• Judging mood benefit in a few nights: sleep can improve first; antidepressant response typically needs longer, consistent dosing.

Doctor opinions

Doctors who prescribe trazodone a lot tend to describe it as a “two‑job” antidepressant: mood plus sleep. They also warn that the same receptor effects that help sleep can cause orthostatic symptoms (light‑headedness on standing) and morning grogginess, mainly when dosing is pushed too high too fast.

A typical prescriber mindset in 2026 is cautious titration: start, assess sedation, then adjust. This approach lines up with safety guidance on antidepressants from organisations such as the WHO and regulatory assessment standards used internationally. ^[3]

Frequently asked questions

How long does Trazodone take to work?

Sedation can start on the first dose, often within the first few hours, which is why many people feel a sleep effect early. Antidepressant benefit usually takes longer, commonly a few weeks of consistent dosing before a clear change is felt. Clinicians usually reassess response after several weeks and adjust the plan rather than changing daily based on a single night. In 2026, EMA-assessed antidepressant evidence still supports that onset for mood symptoms is gradual, not immediate.

Is Trazodone addictive?

Trazodone is not considered addictive in the way benzodiazepines or opioids can be, and it is not a controlled substance in many settings. Some people can develop dependence-like patterns in the sense that sleep feels difficult if they stop suddenly after regular use. This is usually managed by tapering rather than abrupt discontinuation. WHO guidance on psychotropic medicines separates classic addiction from withdrawal and rebound symptoms, which is the more relevant concept here.

Can I drink alcohol while taking Trazodone?

Alcohol can amplify trazodone’s sedative effects and worsen coordination, reaction time, and next‑day grogginess. It can also deepen low mood in some people, working against the treatment goal. People who drink in the evening often notice more dizziness when they stand up at night, which is a fall risk. EMA safety reviews for sedating antidepressants consistently flag additive central nervous system depression with alcohol.

What are the serious side effects I should recognise quickly?

Priapism (a painful erection lasting hours) is rare but urgent and needs emergency assessment. Seek urgent medical care for signs of serotonin syndrome as well: agitation, confusion, sweating, tremor, diarrhoea, and fever after combining serotonergic medicines. New chest pain, fainting, or palpitations also need rapid evaluation because rhythm effects are a known risk area in vulnerable patients. These risks are described in regulatory safety information used by bodies such as the EMA and referenced by clinical guidance.

Does Trazodone cause weight gain?

Weight change can happen with many antidepressants, but trazodone is not among the strongest drivers of weight gain in routine practice. Some people gain weight indirectly because sleep improves and appetite returns, while others lose weight if nausea persists early on. If weight change is rapid or distressing, clinicians often review sleep, diet timing, and co‑medications before blaming trazodone alone. In 2026, guideline discussions from EMA-assessed antidepressant data still treat weight change as variable and patient-specific.

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