MY SON HAS AN ACTIVE DIAGNOSIS FOR BI POLAR AND

MY SON HAS AN ACTIVE DIAGNOSIS FOR BI POLAR AND IS NOW SAYING HE SEES BLACK SPOTS AND IS HEARING VOICES NOW ALSO. He is nearly 26 and is functioning at a 20 yr old level socially and emotionally. He lives within a fluid community setting where pot and other drug of choice is available. He takes his medication at night... but if he wants to drink he will abstain from it saying he has a 24 hr time allowance in body. I am concerned that this is creating these issues...