I used to use a variety of drugs and alcohol, and looking back at it, I think it was due to a shame of stuttering to some degree. As other people said, it's not a wise choice to make -- in the end, you'll be a stutterer and an alcoholic/addict, it's a temporary fix but feeding a more serious monster. The best way for me is to just own that I'm a stutterer. People care less than I thought they would.