What is the half life of Seroquel XR, the new reformulated version of Seroquel

12.3 Pharmacokinetics
The mean-terminal half-life is approximately 7 hours for quetiapine and 9 to 12 hours for N-desalkyl quetiapine within the clinical dose range. Steady-state concentrations are expected to be achieved within two days of dosing.

I do not think seroquel is a safe drug. There was a class action suit against the company for that drug in the U.S. My husband took it and had seizures from it. He does not take it anymore, but now can not drive. Just look at all your options regarding this drug.

try drugs.com search for seroquel then click on the link for profesionals.