Wondering what the Orthodox Church considers to be Suicide

I know that the Orthodox Church considers direct suicide (as in killing yourself via a single specific harmful act, such as taking pills you know will kill you, hanging yourself, etc.) to be a "mortal sin" and as such the usual prayers for the departed are not said. I know someone who died when their body failed due to many years of poor care. This person drank an obscene amount of alcohol, ate very poorly, and did not exercise at all. I'm wondering is this considered a form of suicide (at least to the Orthodox Church)?