Maximum Daily Dosage of Seroquel (Quetiapine)

Dosing by Indication

• The American Academy of Family Physicians recommends a maximum dose of 750 mg/day for schizophrenia and 400 mg/day for Alzheimer's disease-related behavioral disturbances 1
• For Alzheimer's disease and behavioral disturbances, the maximum dose is 200 mg twice daily (400 mg/day total), with an initial dosage of 12.5 mg twice daily 1, 2

Critical Dosing Considerations

• The American Academy of Family Physicians suggests starting with 25 mg orally for acute settings, with scheduled dosing every 12 hours if needed, and gradual dose escalation is essential, particularly in elderly patients 1, 3
• Monitor for orthostatic hypotension during initial dose titration, especially in elderly patients and those on concurrent CNS depressants 3
• Avoid abrupt discontinuation or rapid dose decreases, as withdrawal symptoms can occur, and taper gradually over 10-14 days when discontinuing 3, 4

Common Pitfalls to Avoid

• Do not use maximum schizophrenia doses (750-800 mg/day) in elderly patients with dementia—the maximum for this population is 400 mg/day total 1, 2
• Be aware that quetiapine is more sedating than other atypical antipsychotics, which may limit tolerability at higher doses 1