Hello and welcome,
My son was on seroquel for almost three years and it really helped him alot but it works best when it is being taken with another mood stablizer. Seroquel helps with the mania and many of the issues that come along with it, voices, inability to sleep, calming down. Our son got past the sedative aspect of it within a week or so and it worked well until recently when it was changed to Risperdal. Many of our kids take a combination of meds to be able to help all of their symptoms. I would talk with his doctor and ask some more questions. Our son is currently on Lamictal, Risperdal, Tenex & Abilify. Good luck and I hope things improve soon.
Sharon-Mom to Lukas,a ge 11-BIPOLAR & ADHD
Anna-AGE 10-ADHD
Candice-Age 22
Bobby-Age 23
Wife to Bill-mood disorder