Trazodone and Alcohol: Why the Combination Is Risky

You take trazodone at bedtime because sleep wouldn’t come any other way. Tonight there was wine with dinner, and now you’re standing at the counter wondering whether your usual dose is still a good idea. That hesitation is worth listening to.

At the low doses most people take for sleep, trazodone blocks three receptor types: serotonin 5-HT2A, histamine H1, and alpha-1 adrenergic receptors, according to Stahl’s pharmacology review. Histamine blockade brings drowsiness. Alpha-1 receptors help your blood vessels tighten when you stand, and the trazodone prescribing information links blocking them to postural hypotension, a drop in blood pressure on standing. Alcohol sedates too, and it lowers blood pressure for hours, so understanding the risk takes precision about exactly where the two overlap.

The standard advice is consistent and well grounded. The label tells prescribers to counsel patients that trazodone may enhance the response to alcohol and other central nervous system depressants. The National Institute on Alcohol Abuse and Alcoholism’s medication interaction guide lists trazodone among antidepressants where drinking can cause drowsiness, dizziness, a higher overdose risk, and increased feelings of depression or hopelessness. The label’s Medication Guide tells patients not to drink alcohol until they’ve talked with their healthcare provider. Even the UK’s NHS medicines guidance, which says you can drink on trazodone, suggests stopping until you see how the medicine affects you.

But “be careful” doesn’t tell you which risk matters most for you, and at Siggy we’d rather lay out the mechanism than hand you a vague warning. Trazodone and alcohol overlap at four points: sedation, blood pressure and falls, next-morning impairment, and overdose. For people who drink regularly there’s a fifth, which is what trazodone does to drinking itself when it’s used as a sleep aid. Each has its own evidence, and together they explain the caution on the label.

What This Page Covers

• The Short Answer
• Where Trazodone and Alcohol Overlap
• Dizziness, Low Blood Pressure, and Falls
• The Morning After
• Overdose and Breathing Risks
• Trazodone, Alcohol, and Sleep Problems
• If You Take Trazodone and Drink

The Short Answer

Mixing trazodone and alcohol isn’t recommended. Most people who have a drink and take a usual dose won’t have a medical emergency, but the combination makes heavy drowsiness, dizziness, fainting, and falls more likely, and it can leave you foggier the next morning. At high amounts of either, the risk becomes serious: the label reports deaths from overdose when trazodone was taken with alcohol or other depressants.

Where Trazodone and Alcohol Overlap

Trazodone is sedating on its own. In the label’s outpatient trials, drowsiness affected 41% of people on trazodone versus 20% on placebo, and dizziness or light-headedness affected 28% versus 15%. Those trials started at 150 mg a day, a depression dose, so effects at the lower doses many people take for sleep may be smaller. Even so, sedation is the reason trazodone is used for sleep in the first place, and the studies below used 50 mg and 100 mg.

The only direct interaction study is small and old. In a crossover study of six healthy volunteers, trazodone didn’t change blood alcohol levels, although alcohol delayed trazodone’s peak. Trazodone 100 mg alone caused marked drowsiness, slowed reactions, and impaired dexterity, and adding alcohol further impaired manual dexterity. The authors said their results don’t suggest drinking is safe for people taking antidepressants, while noting that sedation from both tends to ease over a few weeks of regular treatment. Six people is a very small sample, so this study shows the direction of the effect, not its size for you.

Here’s how the two substances line up on each risk:

Risk	What Trazodone Adds	What Alcohol Adds
Drowsiness	41% of outpatients vs 20% on placebo	Sedation, worse daytime sleepiness
Blood pressure	Alpha-1 blockade, low blood pressure	Lower blood pressure for hours
Next morning	Memory and balance dips at 50 mg	Disrupted second half of the night
Overdose	Label deaths involved other depressants	Alcohol named among them

Each row is explained below with its source.

Dizziness, Low Blood Pressure, and Falls

This is the risk people underestimate. The label reports hypotension, including orthostatic hypotension and fainting, in people taking trazodone. In its outpatient trials, low blood pressure occurred in 4% versus 0% on placebo, and fainting in 5% versus 1%.

Alcohol pushes in the same direction for hours. A Cochrane review of 32 randomized trials found that one to two drinks lowered systolic blood pressure by about 5.6 mmHg within six hours, and heavier drinking lowered it for up to 12 hours while raising heart rate. Most participants were healthy men with an average age of 33, so results may differ in older adults or people taking blood pressure medicine, and the trazodone label notes that people on blood pressure medicine may need a lower dose of it.

Put those together and the classic scenario is getting up at night to use the bathroom: sedated, with blood pressure that drops when you stand. Falls are a real concern. In a nursing home study of 7,791 residents, 5.7% of new low-dose trazodone users had a fall-related injury within 90 days, compared with 6.0% of new benzodiazepine users, meaning trazodone was no safer on falls. NIAAA also warns that alcohol combined with some medicines can lead to falls and serious injuries, especially in older people.

The Morning After

Trazodone’s effects don’t always end when you wake up. In a placebo-controlled study of 16 adults with insomnia, trazodone 50 mg at bedtime produced small but significant next-morning impairments in short-term memory, verbal learning, balance, and arm muscle endurance. Simulated driving wasn’t affected in that study, which is reassuring, but the balance finding matters for falls.

Alcohol adds its own hangover to the night. A sleep research review found that alcohol improves sleep at first but disturbs the second half of the night at higher doses, and that it worsens daytime sleepiness. The label advises caution with driving and hazardous machinery until you know trazodone doesn’t affect you, and that advice counts double after drinking.

Overdose and Breathing Risks

The label’s overdose section draws a clear line around combinations. It states that deaths from overdose have occurred in people who took trazodone together with other central nervous system depressants, and it lists alcohol first. The most severe reactions reported with trazodone overdose alone include respiratory arrest, seizures, heart rhythm changes, and priapism.

Heart rhythm is worth knowing about even at ordinary doses. The label says trazodone prolongs the QT interval, a measure of the heart’s electrical recovery, and that dangerous rhythms have been reported at doses of 100 mg or less. That’s one more reason to take fainting, a racing heartbeat, or chest pain seriously.

Trazodone, Alcohol, and Sleep Problems

Many people combine the two because they’re chasing sleep, and that’s where the evidence is most surprising. In a randomized trial of 173 people after alcohol detox, trazodone 50 to 150 mg at bedtime improved sleep quality while it was taken. The trazodone group, however, made less progress on days without drinking during treatment. By six months, after the medication had stopped, the change in drinks per drinking day from baseline was about 4.6 drinks worse in the trazodone group than in the placebo group, while sleep quality fell back to placebo levels.

The broader sleep evidence is cautious too. The American Academy of Sleep Medicine, in its insomnia treatment guideline, suggests clinicians not use trazodone for sleep-onset or sleep-maintenance insomnia, a weak recommendation based on limited evidence. If alcohol is part of why your sleep is broken, a sleep medicine layered on top may mask the problem instead of fixing it. Our guide to trazodone for sleep covers the options in more depth.

If You Take Trazodone and Drink

A few habits lower the risk, and none of them replaces a conversation with your prescriber:

• Ask ahead of time what to do about your dose on nights you’ve had a drink, instead of deciding at bedtime.
• If you’ve been drinking and aren’t sure about tonight’s dose, check with a pharmacist or your prescriber before taking it, and never double a later dose to make up for one you skipped.
• Don’t stop trazodone suddenly on your own. The label recommends a gradual dose reduction rather than stopping abruptly.
• Get up slowly, especially at night, and sit on the edge of the bed for a moment first.
• Skip driving the next morning if you feel groggy or unsteady.
• Don’t add other sedating medicines, sleep aids, or cannabis without checking first.
• Tell your prescriber honestly how much you drink, because it can change which sleep or depression medicine fits you best.

Call 911 right away if someone who took trazodone and drank can’t stay awake, is breathing slowly or irregularly, faints, has a seizure, or has chest pain or a racing heartbeat. An erection lasting more than four hours is also an emergency. For non-emergency overdose questions, call Poison Help at 1-800-222-1222. If you have thoughts of harming yourself, call or text 988.

When sleep has been broken for months, a drink plus a pill can start to feel like the only lever left.

Trazodone and alcohol stack sedation, lower blood pressure, and blur the next morning, and at high amounts they can be deadly together. If you drink and take trazodone, the most useful step is a specific plan with your prescriber for nights you drink, plus a look at whether alcohol is part of your sleep problem. Our guide to trazodone side effects worth reporting covers the other changes to watch for.

Ready to take control of your mental health? Start your anonymous intake with Siggy and get your plan reviewed by a licensed prescriber.

This article is for education only and isn’t a substitute for personal medical advice. It was reviewed for clinical accuracy and reflects sources available as of September 2026. Talk with your own clinician before starting, changing, or stopping any medication, and before drinking alcohol while taking one.