Even though Seroquel XR (extended release) is part of my daily cocktail, my psychiatrist prescribes regular Seroquel for me to use "as needed" beyond my normal meds, like Pookyl mentions above. I usually take either a 25 mg or 50 mg tablet up to 100 mg in a day. If I need "as needed" Seroquel for multiple days, it's time for me to call my psychiatrist for a likely increase in my daily Seroquel XR dosage.

I also have 1 mg Ativan pills to use "as needed", up to 3 mg in a day. They really help, too. It could usually be either Ativan or Seroquel, but Ativan seems particularly quick at curbing my agitation. Ativan added to my evening meds helps me fall asleep better than just 25 or 50 mg extra Seroquel added to my usual 600 mg Seroquel XR. It's a no-no for me to make a habit out of using Ativan. My psychiatrist prefers I use the Seroquel for "as needed". Seroquel is also helpful for my acute anxiety relief, but Ativan is even better at that for me and doesn't sedate me as much as Seroquel during the day (even though it sedates me more at night).