I have been going through a bad episode of anxiety for the last few weeks. I had been on a low dose of Seroquel (an anti-psychotic) which really calmed my anxiety and racing thoughts. However, after being on it for a long time, it seems like I developed tolerance and it didn't have the same effect, so after a stressful time last month, my anxiety returned. The other day my psychiatrist upped my seroquel to 400mg. Although this is quite a high dose for anxiety, it has really helped my symptoms so far.
Still, because of side effects, I hope that I'll be able to go down on my dosage after some time.