Should trazodone be continued on the day of surgery?

Should Trazodone Be Continued on the Day of Surgery?

Trazodone should generally be continued on the day of surgery, but requires careful risk assessment for serotonin syndrome when combined with perioperative opioids, particularly fentanyl, meperidine, methadone, tramadol, or tapentadol.

Primary Recommendation

While there is no specific guideline explicitly addressing trazodone's perioperative management in the SPAQI consensus statement 1, trazodone is specifically identified as a serotonergic medication that increases the risk of serotonin syndrome when combined with certain opioids 1. The 2021 SPAQI guidelines emphasize that perioperative serotonin syndrome risk increases with medications like trazodone when used alongside serotonergic opioids (levorphanol, meperidine, fentanyl, methadone, tapentadol, and tramadol) 1.

Clinical Decision Algorithm

Continue Trazodone If:

• The planned anesthetic does NOT include serotonergic opioids (fentanyl, meperidine, methadone, tramadol, tapentadol)
• Patient uses trazodone for depression or chronic insomnia
• Abrupt discontinuation risks psychiatric decompensation
• Surgery uses non-serotonergic opioids (morphine, hydromorphone, oxycodone) or regional anesthesia

Hold Trazodone on Day of Surgery If:

• High-dose serotonergic opioids are planned (especially fentanyl-based anesthesia)
• Patient has cardiac arrhythmias or QT prolongation 2
• Concurrent use of other serotonergic agents (SSRIs, SNRIs, MAOIs)
• Patient has orthostatic hypotension or syncope history 2

Critical Safety Considerations

Serotonin Syndrome Risk

The FDA label explicitly warns that trazodone can precipitate serotonin syndrome when combined with fentanyl, tramadol, and other serotonergic drugs 2. This is a potentially life-threatening condition characterized by mental status changes, autonomic instability, neuromuscular symptoms, and seizures 2. The SPAQI guidelines specifically list trazodone among medications that increase this risk perioperatively 1.

Cardiac Concerns

Trazodone prolongs the QT/QTc interval and may cause arrhythmias, including torsade de pointes, even at doses ≤100 mg 2. Avoid combining with other QT-prolonging anesthetic agents or in patients with pre-existing cardiac disease 2.

Hypotension Risk

Trazodone causes orthostatic hypotension and syncope 2. When combined with anesthetic agents and antihypertensives, this effect may be potentiated, requiring careful hemodynamic monitoring.

Practical Implementation

For most elective surgeries: Continue trazodone if the patient takes it chronically for depression or insomnia, but communicate with anesthesia to avoid high-dose serotonergic opioids. Consider using morphine, hydromorphone, or regional techniques instead of fentanyl-based anesthesia.

For emergency surgery: If the patient took trazodone within 24 hours, inform the anesthesiologist immediately to adjust the anesthetic plan and monitor closely for serotonin syndrome signs.

Discontinuation is NOT recommended for chronic users due to withdrawal symptoms (nausea, dysphoric mood, irritability, dizziness, sensory disturbances) 2 and risk of psychiatric relapse 3.

Common Pitfalls to Avoid

1. Don't assume all antidepressants are the same - Trazodone has unique serotonergic properties that specifically interact with certain opioids
2. Don't overlook the anesthetic plan - The decision hinges on which opioids will be used intraoperatively
3. Don't forget about other serotonergic medications - Check for SSRIs, SNRIs, ondansetron, metoclopramide, which compound the risk 1, 2
4. Don't ignore cardiac history - Trazodone's QT prolongation effects are clinically significant 2

The evidence supports a nuanced, anesthesia-coordinated approach rather than routine discontinuation, prioritizing patient safety while avoiding unnecessary psychiatric destabilization.