Quetiapine used for sundowning behavloral problems compaired to risperdone?

Seroquel is what dad is on although the dosage has been quadrupled over the last 2 years.

It depends on the patient. Seroquel worked great for my mom, but, Ativan had the completely opposite effect as intended. Mom never tried risperadone. It is often a trial and error process, that requires much patience and perseverance, to find a medication or combinations that will work.