Trazodone and Prolonged Erections: When It Is an Emergency

Trazodone is a widely prescribed medication, and for most people its side effects are mild. One uncommon effect needs to be understood ahead of time, because acting quickly makes a real difference: a prolonged erection, known medically as priapism. This guide explains what it is, how to judge the situation by the clock, and what to tell a provider before starting. It is educational and does not replace medical advice.

The essential point

An erection that lasts more than four hours is a medical emergency, whether or not it is painful. Go to an emergency department. Do not wait to see whether it resolves, and do not try to treat it at home.

What priapism is

Priapism is an erection that continues for hours without sexual stimulation or long after stimulation has ended. In the type associated with medications, blood becomes trapped in the penis and cannot drain. Without fresh blood flow, the tissue is deprived of oxygen, and lasting damage can follow if it is not treated in time.

Why trazodone can cause it

An erection normally ends when certain nerve signals cause blood vessels in the penis to narrow, letting blood drain away. Trazodone can block the receptors that carry those signals. In rare cases, this prevents the erection from subsiding.

Priapism is listed as a warning in the FDA-approved prescribing information for trazodone. It is rare, and it has been reported at a range of doses, including lower ones.

Judging the situation by the clock

Under one hour

An erection on waking, or one that follows arousal and subsides in the usual time, is normal and is not a cause for concern.

One to four hours

An erection that lasts unusually long, or that occurs without any stimulation and does not settle, is a warning sign. It is not yet an emergency, but it should not be ignored.

What to do: contact your prescribing provider the same day and do not take your next dose until you have spoken with them. If it is still present as the four-hour mark approaches, go to an emergency department.

More than four hours

This is an emergency.

What to do: go to an emergency department immediately. Tell the staff that you take trazodone and when you last took it, along with any other medications.

Who should mention it before starting

Certain conditions raise the risk of priapism in general. Tell your provider if you have:

• Sickle cell disease or sickle cell trait
• Leukemia or multiple myeloma
• A condition affecting the shape of the penis, such as Peyronie's disease
• A previous episode of priapism or prolonged erections from any cause

Also list every medication you take. This matters most for erectile dysfunction medications, alpha-blockers for prostate or blood pressure, and other medications that affect mood.

Other important safety information about trazodone

Priapism is one of several points to be aware of.

• Boxed warning. Like other antidepressants, trazodone carries an FDA boxed warning about an increased risk of suicidal thoughts and behavior in children, adolescents, and young adults. Report any new or worsening mood changes promptly. If you ever feel at risk of harming yourself, call or text 988 in the United States.
• Drowsiness. It can impair driving and alertness, including the next morning. Alcohol and other sedating medications add to this.
• Dizziness on standing. Rise slowly from sitting or lying down.
• Heart rhythm. Tell your provider about any heart condition or history of irregular heartbeat.
• Interactions. It must not be combined with certain antidepressants known as MAOIs. Combining it with other medications that affect serotonin can cause a serious reaction.
• Stopping. Do not stop suddenly without guidance from your provider.

Trazodone and sleep: what "FDA-approved" covers

Trazodone is an FDA-approved medication for major depressive disorder. Providers also commonly prescribe it at lower doses to help with sleep. That is an off-label use, meaning the FDA has not approved it for that purpose. Off-label prescribing is legal and common, and the decision rests with the provider based on your individual situation.

Common questions

Does this affect women?
A similar prolonged engorgement of the clitoris has been reported but is very rare. Any painful, persistent genital swelling should be evaluated.

If it happens once and goes away, can I keep taking it?
Not without speaking to your provider first. An episode is a reason to review the prescription.

Does a lower dose remove the risk?
No. It has been reported at low doses as well.

Before you start: a short checklist

• I have told my provider about any blood disorders and past prolonged erections
• I have listed all my medications, including any for erectile dysfunction
• I know that an erection lasting more than four hours means the emergency department
• I know whom to contact with questions about side effects

Care through Nu Image

Nu Image offers online evaluations with licensed providers, who review your health history and medications before deciding whether trazodone is appropriate. If it is prescribed, raise any side effect with the care team promptly.

This content is for educational purposes only and is not medical advice, diagnosis, or treatment. Trazodone is a prescription medication. Any erection lasting longer than four hours requires emergency medical evaluation. Prescription products require an online consultation with a licensed healthcare provider, who will determine whether a prescription is appropriate.