Quetiapine (Seroquel) and Elective Anesthesia
Continue quetiapine on the day of surgery, but inform the anesthesia team and prepare for potential hemodynamic instability, particularly refractory hypotension requiring vasopressin.
Perioperative Management
Antipsychotics, including quetiapine, should generally be continued throughout the perioperative period 1. The primary concern is avoiding acute withdrawal and postoperative delirium, which can occur when these medications are abruptly discontinued 2, 3. However, quetiapine presents specific anesthetic challenges that require careful planning.
Key Anesthetic Considerations
Quetiapine's α-adrenergic antagonism creates significant risk for refractory hypotension during general anesthesia 4. A documented case report demonstrated hypotension that was most responsive to vasopressin rather than traditional vasopressors 4. This occurs because quetiapine blocks α-adrenergic receptors, reducing the effectiveness of catecholamine-based vasopressors.
The anesthesia team must be specifically informed about:
- Hypotension risk: Expect orthostatic hypotension and potential cardiovascular instability during induction 5
- Vasopressor strategy: Have vasopressin readily available as first-line treatment for refractory hypotension 4
- CNS depression: Quetiapine potentiates sedative effects of anesthetic agents 5
- QT prolongation: Monitor for arrhythmias, particularly if using other QT-prolonging perioperative medications 5
Specific Precautions
Blood pressure monitoring is critical - quetiapine causes dose-dependent hypotension through α1-adrenergic antagonism 5. The FDA label specifically warns about orthostatic hypotension, syncope, and falls, with particular caution in patients with cardiovascular disease 5.
Avoid serotonergic opioids if possible - while not explicitly contraindicated, combining quetiapine with serotonergic agents (meperidine, tramadol, fentanyl) theoretically increases serotonin syndrome risk 6. If these opioids are necessary, use heightened vigilance for neuroexcitatory symptoms.
Common Pitfalls to Avoid
- Do not discontinue abruptly: Stopping quetiapine perioperatively risks withdrawal symptoms (insomnia, nausea, vomiting) and psychiatric decompensation 5, 3
- Do not rely solely on phenylephrine or norepinephrine: The α-blockade may render these less effective; vasopressin works through different receptors 4
- Do not overlook metabolic effects: Quetiapine can cause hyperglycemia; check glucose perioperatively in at-risk patients 5
Practical Algorithm
- Continue quetiapine through morning of surgery with small sip of water 1, 2
- Alert anesthesia team to quetiapine use and potential for refractory hypotension
- Ensure vasopressin availability in operating room
- Monitor closely for hypotension during induction and throughout procedure
- Resume quetiapine as soon as patient can tolerate oral medications postoperatively 5
The evidence strongly supports continuation rather than discontinuation, with the understanding that this requires proactive anesthetic management of predictable complications 1, 2, 3.