What PRN medication would you prescribe for agitation in outpatient setting?

The patient is a young adult with unspecified mental handicap who comes with mom. He has been on the following regimen for years: clonidine 0.3mg per day depakote DR 1000mg per day geodon 200mg per day valium 20mg per day (Most of the above medications are split into two dosings a day.) He has been on the regimen for years and is tolerating medications. Mother does not want to change the treatment. The above combination was from much trial and error and patient used to be much worse.... What PRN medication would you prescribe for agitation in outpatient setting?
Source: Student Doctor Network - Category: Universities & Medical Training Authors: Source Type: forums