Okay so what happens is that antipsychotics can be used for the off-label use for sedative properties; for sleep and for anxiety.

I used to be on an antipsychotic for anxiety until I got better enough to be off of it. Yes, an antidepressant and antipsychotic may be better, but that wasn't an option so I had the antipsychotic alone.

The increased Effexor may help, so perhaps consider trying that out first, but what he is essentially trying to do is not prescribe an "anti-anxiety" med because those are actually more habit-forming and tolerance does build up after a few weeks to a month of regular use, perhaps sooner.