1. Trazodone oral tablet is available as a generic drug. It doesn’t have a brand-name version.
  2. Trazodone only comes as a tablet you take by mouth.
  3. Trazodone is used to treat depression.

Trazodone oral tablet is a prescription drug. It’s available only as a generic drug. Generic drugs usually cost less than brand-name drugs.

Why it’s used

Trazodone is used to treat depression in adults.

How it works

Trazodone belongs to a class of drugs called antidepressants. A class of drugs is a group of medications that work in a similar way. These drugs are often used to treat similar conditions.

It isn’t fully understood how trazodone works. It may increase serotonin activity in your brain. Serotonin is a chemical in your brain that can help stabilize your mood.

Trazodone oral tablet may cause drowsiness or sleepiness. You shouldn’t drive, use machinery, or do other activities that require alertness until you know how this drug affects you.

Trazodone can cause mild or serious side effects. The following list contains some of the key side effects that may occur while taking trazodone. This list does not include all possible side effects.

For more information on the possible side effects of trazodone, or tips on how to deal with a troubling side effect, talk with your doctor or pharmacist.

More common side effects

The more common side effects of trazodone can include:

  • swelling
  • sleepiness
  • dizziness
  • diarrhea
  • stuffy nose
  • weight loss
  • blurred vision

These effects may go away within a few days or a couple of weeks. If they’re more severe or don’t go away, talk to your doctor or pharmacist.

Serious side effects

Call your doctor right away if you have serious side effects. Call 911 if your symptoms feel life threatening or if you think you’re having a medical emergency. Serious side effects and their symptoms can include the following:

  • Thoughts of suicide and worsening depression. Symptoms include:
    • thoughts about suicide or dying
    • attempts to die by suicide
    • new or worse depression
    • new or worse anxiety
    • feeling very agitated or restless
    • panic attacks
    • insomnia (trouble sleeping)
    • new or worse irritability
    • acting aggressive, angry, or violent
    • acting on dangerous impulses
    • mania (an extreme increase in activity and talking)
    • other unusual changes in behavior or mood
  • Serotonin syndrome. Symptoms include:
    • agitation
    • confusion or trouble thinking
    • hallucinations (seeing or hearing something that isn’t there)
    • problems with coordination
    • fast heart rate
    • tight muscles
    • trouble walking
    • nausea
    • vomiting
    • diarrhea
  • Vision problems. Symptoms include:
    • eye pain
    • changes in your vision, such as blurred vision or visual disturbances
    • swelling or redness in or around your eye
  • Irregular or fast heartbeat
  • Low blood pressure. Symptoms include:
    • dizziness or fainting when you change positions, such as standing up from a sitting position
  • Unusual bruising or bleeding
  • Erection that lasts longer than 4 hours
  • Hyponatremia (low sodium in your blood). Symptoms include:
    • headache
    • weakness
    • confusion
    • trouble concentrating
    • memory problems
    • feeling unsteady when you walk

Suicide prevention

  1. If you think someone is at immediate risk of self-harm or hurting another person:
  2. • Call 911 or your local emergency number.
  3. • Stay with the person until help arrives.
  4. • Remove any guns, knives, medications, or other things that may cause harm.
  5. • Listen, but don’t judge, argue, threaten, or yell.
  6. If you or someone you know is considering suicide, get help from a crisis or suicide prevention hotline. Try the National Suicide Prevention Lifeline at 800-273-8255.

The trazodone dosage your doctor prescribes will depend on various factors. These include:

  • the type and severity of the condition you’re using the drug to treat
  • your age
  • the form of the drug you take
  • other medical conditions you may have

Typically, your doctor will start you on a low dosage and adjust it over time to reach the dosage that’s right for you. They’ll ultimately prescribe the smallest dosage that provides the desired effect.

The following information describes dosages that are commonly used or recommended. However, be sure to take the dosage your doctor prescribes for you. Your doctor will determine the best dosage to suit your needs.

Forms and strengths

Generic: Trazodone

  • Form: oral tablet
  • Strengths: 50 mg, 100 mg, 150 mg, 300 mg

Dosage for major depressive disorder

Adult dosage (ages 18 years and older)

  • Typical starting dosage: 150 mg per day in divided doses.
  • Dosage increases: Your doctor may increase your dose by 50 mg per day every 3 or 4 days.
  • Maximum dosage: 400 mg per day in divided doses. If you’re staying in a hospital, the maximum dosage is 600 mg per day.

Child dosage (ages 0–17 years)

This drug hasn’t been studied in children. It shouldn’t be used in people younger than 18 years old.

Trazodone oral tablet is used for long-term treatment. It comes with serious risks if you don’t take it as prescribed.

If you stop taking the drug or don’t take it at all. If you stop taking this drug suddenly or don’t take it, your depression may not get better. You may also have withdrawal symptoms. These include anxiety, agitation, and trouble sleeping. If you need to stop taking this drug, your doctor will slowly lower your dose over time.

If you miss doses or don’t take the drug on schedule. Your medication may not work as well or may stop working completely. For this drug to work well, a certain amount needs to be in your body at all times.

If you take too much. You could have dangerous levels of trazodone in your body. Symptoms of an overdose of this drug can include:

  • an erection that lasts longer than 4 hours
  • seizures
  • changes in the way your heart functions, including QT prolongation (a heart rhythm issue that may cause chaotic or abnormal heartbeats)

If you think you’ve taken too much of this drug, call your doctor or seek guidance from the American Association of Poison Control Centers at 800-222-1222 or through their online tool. But if your symptoms are severe, call 911 or go to the nearest emergency room right away.

What to do if you miss a dose. Take your dose as soon as you remember. But if you remember just a few hours before your next scheduled dose, take only one dose. Never try to catch up by taking two doses at once. This could result in dangerous side effects.

How to tell if the drug is working. You should have decreased feelings of depression, and your mood should improve.

This drug comes with various warnings.

FDA warning: Suicide risk warning

  • Trazodone has a boxed warning. This is the most serious warning from the Food and Drug Administration (FDA). A boxed warning alerts doctors and patients about drug effects that may be dangerous.
  • Drugs used to treat depression, including trazodone, may cause an increase in suicidal thoughts or actions. This risk is higher in children, teenagers, or young adults. It’s also higher within the first few months of treatment with this drug or during dosage changes. You and your family members, caregivers, and doctor should watch for any new or sudden changes in your mood, behaviors, thoughts, or feelings. Call your doctor right away if you notice any changes.
  • Trazodone is not approved for use in pediatric patients

Serotonin syndrome warning

This drug can cause a life threatening condition called serotonin syndrome. This risk is higher when you first start taking this drug or during dosage changes.

Your risk may be higher if you also take other drugs that have similar effects as trazodone, such as other drugs used to treat depression.

Symptoms of serotonin syndrome include agitation, hallucinations, confusion or trouble thinking, nausea, vomiting, and diarrhea.

They also include coordination problems, muscle twitching, stiff muscles, racing heart rate, high or low blood pressure, sweating, fever, and coma.

Call your doctor right away if you have these symptoms.

Angle-closure glaucoma warning

This drug can cause your pupils to be slightly bigger and lead to angle-closure glaucoma (a condition that causes increased pressure in your eyes). If you’re at high risk for this condition, your doctor may give you a medication to help prevent it.

Bleeding warning

Taking this drug with other medications that affect your ability to stop bleeding may increase your risk for bleeding. This includes serious, life threatening bleeding, and bleeding-related events, such as nosebleeds, bruising, or skin discoloration due to bleeding below your skin.

These drugs include warfarin, dabigatran, rivaroxaban, and pain medications called nonsteroidal anti-inflammatory drugs (NSAIDs), such as ibuprofen and aspirin.

Allergy warning

Trazodone can cause a severe allergic reaction. Symptoms can include:

  • trouble breathing
  • swelling of your face, tongue, eyes, or mouth
  • rash, hives (itchy welts), or blisters, alone or with fever or joint pain

If you have an allergic reaction, call your doctor or local poison control center right away. If your symptoms are severe, call 911 or go to the nearest emergency room.

Don’t take this drug again if you’ve ever had an allergic reaction to it. Taking it again could be fatal (cause death).

Alcohol interaction warning

Consuming drinks that contain alcohol can increase your risk for sleepiness or dizziness from trazodone. If you drink alcohol, talk to your doctor about whether alcohol use is safe for you while you take this drug.

Warnings for people with certain health conditions

For people with heart disease. Ask your doctor whether this drug is safe for you. Taking trazodone may cause irregular heartbeat and a prolonged QT interval (a heart rhythm issue that may cause chaotic or abnormal heart beats). Your doctor may watch you closely if you take this drug.

For people with angle-closure glaucoma. This drug may make your pupils bigger and may cause an angle-closure attack.

For people with a history of mania or bipolar disorder. You may have a higher risk for manic episodes. If you have a history of mania or bipolar disorder, your doctor may need to prescribe a different medication.

Warnings for other groups

For pregnant women. There haven’t been enough studies done in humans to be certain how this drug might affect a pregnancy.

Research in animals has shown negative effects to the fetus when the mother takes this drug. However, animal studies don’t always predict the way humans would respond.

Talk to your doctor if you’re pregnant or planning to become pregnant. This drug should only be used if the potential benefit justifies the potential risk to the fetus. Call your doctor right away if you become pregnant while taking this drug.

There’s a pregnancy exposure registry that monitors pregnancy outcomes in women exposed to antidepressants during pregnancy. To take part in the National Pregnancy Registry for Antidepressants, call 844-405- 6185 or visit their website.

Women who are breastfeeding. Trazodone may pass into breast milk and may cause side effects in a child who is breastfed. Talk to your doctor if you breastfeed your child. You may need to decide whether to stop breastfeeding or stop taking this medication.

For seniors. The kidneys of older adults may not work as well as they used to. This can cause your body to process drugs more slowly. As a result, more of a drug stays in your body for a longer time. This raises your risk of side effects.

If you’re over the age of 65 years, you may be at higher risk for developing side effects while taking this drug. This includes hyponatremia (low salt levels in your blood).

For children. The safety and effectiveness of this drug haven’t been established in children. This drug shouldn’t be used in people younger than 18 years.

Trazodone oral tablet can interact with several other medications. Different interactions can cause different effects. For instance, some can interfere with how well a drug works, while others can cause increased side effects.

Below is a list of medications that can interact with trazodone. This list does not contain all drugs that may interact with trazodone.

Before taking trazodone, be sure to tell your doctor and pharmacist about all prescription, over-the-counter, and other drugs you take. Also tell them about any vitamins, herbs, and supplements you use. Sharing this information can help you avoid potential interactions.

If you have questions about drug interactions that may affect you, ask your doctor or pharmacist.

Drugs you should not use with trazodone

Do not take these drugs with trazodone. Doing so can cause dangerous effects in your body. Examples of these drugs include:

  • Monoamine oxidase inhibitors (MAOIs), such as isocarboxazid, phenelzine, tranylcypromine, or selegiline. You shouldn’t take trazodone with MAOIs or within 14 days of taking them. Taking these drugs together raises your risk for serotonin syndrome.

Interactions that can cause more side effects

Taking trazodone with certain medications may cause more side effects. These drugs include:

  • Central nervous system (CNS) depressants such as pentobarbital and secobarbital. Trazodone may make your response to barbiturates and other CNS depressants stronger.
  • Warfarin. Taking trazodone with warfarin can increase your risk for bleeding. Your doctor will watch you closely.
  • Nonsteroidal anti-inflammatory drugs (NSAIDs) or aspirin. Trazodone may increase your risk of bleeding when used with these drugs.
  • Depression drugs, such as citalopram, fluoxetine, paroxetine, sertraline, venlafaxine, duloxetine, and St. John’s wort. Taking these drugs together may increase your risk of serotonin syndrome. This condition can be life threatening.
  • Digoxin. Taking trazodone with digoxin may increase the levels of digoxin in your body. This could increase your risk of side effects from digoxin. These include vomiting, dizziness, vision problems, and irregular heart rate. Your doctor may monitor the level of digoxin in your blood if you take these drugs together.
  • Phenytoin. Taking trazodone with phenytoin may increase the levels of phenytoin in your body. This could increase your risk for side effects from phenytoin. These include constipation, changes in mood, confusion, and balance problems. Your doctor may monitor the level of phenytoin in your blood if you take these drugs together.
  • Ketoconazole or ritonavir. The level of trazodone in your body may increase if you take it with ketoconazole, ritonavir, or other drugs that increase levels of trazodone. This can increase your risk of side effects from trazodone. These include serotonin syndrome and vision problems. Your doctor may lower your trazodone dosage if you take drugs that can increase trazodone levels.

Interactions that can make drugs less effective

Certain drugs may decrease the levels of trazodone in your body and make your dosage of trazodone less effective. You doctor may need to increase your dosage of trazodone when you take it with these drugs.

These drugs include:

  • Phenytoin and carbamazepine

Keep these considerations in mind if your doctor prescribes trazodone oral tablet for you.


  • Take trazodone shortly after a meal or snack.
  • You should swallow this drug whole. You can also break it in half along the score line (indented line down the center of the tablet) and swallow it. Don’t chew or crush trazodone tablets.


  • Store trazodone at room temperature. Keep it between 68°F and 77°F (20°C and 25°C).
  • Keep it away from light.


A prescription for this medication is refillable. You should not need a new prescription for this medication to be refilled. Your doctor will write the number of refills authorized on your prescription.


  • Always carry your medication with you. When flying, never put it into a checked bag. Keep it in your carry-on bag.
  • Don’t worry about airport X-ray machines. They can’t hurt your medication.
  • You may need to show airport staff the pharmacy label for your medication. Always carry the original prescription-labeled box with you.
  • Don’t put this medication in your car’s glove compartment or leave it in the car. Be sure to avoid doing this when the weather is very hot or very cold.

Clinical monitoring

You and your doctor should monitor certain health issues. This can help make sure you stay safe while you take this drug. These issues include:

  • Eye health. You may be at risk for angle-closure glaucoma. Your doctor may do an eye exam and treat you if needed.
  • Mental health and behavioral problems. You and your doctor should watch for any changes in your behavior and mood. This drug can cause new mental health and behavior issues. It can also make problems you already have worse.

Prior authorization

Many insurance companies may require a prior authorization for this drug. This means your doctor will need to get approval from your insurance company before your insurance company will pay for the prescription.

There are other drugs available to treat your condition. Some may be better suited for you than others. Talk to your doctor about other drug options that may work for you.

Disclaimer: Healthline has made every effort to make certain that all information is factually correct, comprehensive, and up-to-date. However, this article should not be used as a substitute for the knowledge and expertise of a licensed healthcare professional. You should always consult your doctor or other healthcare professional before taking any medication. The drug information contained herein is subject to change and is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects. The absence of warnings or other information for a given drug does not indicate that the drug or drug combination is safe, effective, or appropriate for all patients or all specific uses.