Trazodone is typically taken once or twice daily, depending on why you’re using it and which form you’ve been prescribed. For sleep, it’s usually a single dose at bedtime. For depression, the standard approach is divided doses spread throughout the day. The specific frequency and amount your prescriber sets will depend on your condition, your response, and whether you’re taking the immediate-release or extended-release tablet.
Dosing Frequency by Condition
The reason you’re taking trazodone shapes how often you take it. For depression, the FDA-approved starting dose is 150 mg per day, split into divided doses. That means you’d take smaller amounts two or three times throughout the day rather than all at once. From there, your prescriber may gradually increase the dose based on how you respond.
For insomnia, trazodone is prescribed at much lower doses, often between 25 and 100 mg, taken as a single dose at bedtime. This use isn’t officially FDA-approved, but it’s one of the most commonly prescribed off-label sleep aids. Because drowsiness is the main effect at low doses, once nightly is all that’s needed.
Extended-release tablets are designed to be taken once daily as a single dose, regardless of the condition being treated. Immediate-release tablets offer more flexibility for splitting across the day.
Maximum Daily Limits
For outpatients (people living at home and seeing their doctor on a regular schedule), the maximum dose is generally 400 mg per day in divided doses. In hospital settings, where patients with severe depression can be monitored more closely, that ceiling goes up to 600 mg per day. These are hard limits, not targets. Most people take well below them.
Taking more than your prescribed amount in a single day, or adding extra doses because the medication doesn’t seem to be working, increases the risk of side effects like excessive drowsiness, dizziness, and drops in blood pressure. If your current dose isn’t helping, the right move is to talk to your prescriber about adjusting it rather than taking it more frequently on your own.
When and How to Take It
Trazodone should be taken shortly after a meal or light snack. Food helps your body absorb the medication more evenly and reduces the chance of side effects like nausea or lightheadedness. Taking it on an empty stomach can intensify drowsiness and cause your blood pressure to dip more than expected.
If drowsiness is a problem during the day, a common adjustment is to shift the larger portion of your daily dose to bedtime. For example, if you’re taking a divided dose for depression and find yourself dragging in the afternoon, your prescriber might move most of the dose to the evening while keeping a smaller amount during the day. This works with the medication’s natural sedating effect rather than against it.
Trazodone’s half-life is roughly 5 to 13 hours, meaning half the drug is cleared from your body in that window. This is why divided dosing works for depression: the effects don’t last a full 24 hours from a single dose. For sleep, the relatively short duration is actually helpful, since it’s less likely to leave you groggy the next morning compared to longer-acting sleep medications.
What to Do if You Miss a Dose
If you miss a dose and it’s close to the time of your next scheduled one, skip the missed dose and continue your regular schedule. Don’t double up to make up for it. Taking two doses close together increases the sedation and can cause a significant drop in blood pressure, especially when you stand up quickly.
If you’re using trazodone for sleep and realize you forgot to take it but only have a few hours before you need to wake up, it’s generally better to skip that night’s dose. Taking it too late can leave you groggy well into the morning.
Taking Trazodone Long Term
Trazodone is considered safe for long-term use. According to the NHS, there don’t appear to be lasting harmful effects from taking it for months or even years. Some people stay on it indefinitely to manage recurring depression or anxiety, and as long as it’s working and side effects are manageable, extended use isn’t a concern.
That said, you shouldn’t stop taking trazodone abruptly after using it regularly. Stopping suddenly can trigger withdrawal-like symptoms, including irritability, trouble sleeping, and general discomfort. The standard approach is a gradual taper, reducing the dose in small steps over time so your brain can adjust. How long that taper takes depends on how much you’ve been taking and for how long. Your prescriber will set the specific schedule.
Side Effects That Affect Timing
The most common side effect is drowsiness, which is why timing matters so much. Other frequent effects include dizziness, dry mouth, and lightheadedness when standing up too fast (a temporary blood pressure drop called orthostatic hypotension). These tend to be most noticeable when you first start the medication or after a dose increase, and they often improve within a week or two.
One rare but serious side effect in men is a prolonged, painful erection lasting more than four hours. This is a medical emergency that requires immediate treatment. The risk is low, but it’s worth knowing about because prompt action prevents long-term damage. This side effect isn’t tied to taking the medication more or less frequently; it can happen at any dose.