insomnia
"For those who has been having anemia or low blood pressure problem (esp ladies), Quetiapine lowered blood pressure and blood sugar level and that causes me feel light-headed, dizziness, fainting spell and developed slight vertigo. Check your blood pressure and discuss with your doctor before taking Quetiapine. I've stopped taking it for more than 1 week and my symptoms of dizziness and fainting spells slowly subsided."