What is Seroquel (quetiapine) half-life?
Seroquel (quetiapine) has an elimination half-life of about 6 hours after single doses and about 7–12 hours with regular dosing.
Does the half-life differ by formulation (IR vs XR)?
Yes. The half-life is generally longer with the extended-release (XR) formulation than with immediate-release (IR), which is why the XR product is taken less often.
Why does half-life matter for dosing and missed doses?
Half-life helps explain how quickly the drug concentration drops and how long quetiapine effects may linger. If you miss a dose, follow your prescriber’s instructions for the specific formulation (IR vs XR), since timing affects how much drug remains in your system.
How do age, liver problems, or other conditions affect it?
Quetiapine is processed in the liver. In people with hepatic impairment, elimination can be slower, which can raise drug exposure and effectively lengthen the half-life compared with typical values.
What patients usually ask next: “How long until it’s out of my system?”
A rough rule of thumb is that it takes several half-lives for a medication to clear substantially. With quetiapine’s half-life, that can mean roughly a day or two for most elimination, but exact timing varies by dose, formulation (IR vs XR), and individual metabolism.
Sources:
No provided sources in the prompt.