Not an artists specifically but I do a lot of drawing and design on a cintiq 22. Also a music producer.
Alcohol has always helped me be productive and creative, BUT it only lasts a very short while. At some point I'll cross the threshold of drunkness and it's pointless attempting anything productive.
Does anyone get a big head when drinking? For example thinking your art/music is better than anyone else? I was very arrogant, and condescending, to others when I was drunk. Embarrasses me looking back.