Yeah, I have had good and bad experiences with drinking on my psych meds. Lithium seems to remove my ability to tell how much I've drank and I've actually had blackouts on lithium several times; never happened off lithium. Other meds seem to increase my tolerance and make it harder to get intoxicated.

Now that being said, if you have mental illness your best bet is to not drink at all. I think there is no surprise that my most stable times came with little or no drinking.