I took 1600mg by accident once and I was fine. Hubby was on 800mg seroquel xr and he went through a phase where he'd hide meds. He was paranoid they'd get stolen or lost. WELLLLLL he stashed his seroquel in the tylenol bottle and I took two.

All it did was knock me out for like 20 hours but I woke up feeling the best I'd felt in a long time lol.

Fortunately I got him to break the habit of putting pills in the wrong bottles.