Depends why are you doing it. If you are doing it with "**** it all", then possibly yes.

If you hate being fat asexual zombie as reason for non-adherence... eh, then could it be really considered SI to try to stop? I think it's more hating the way you feel and you be considered more of self-medicating. (or self-non-medicating. It makes sense. You take drugs when you like how they make you feel. If you are supposed to take drugs and don't like the way they make you feel... then not taking them is... about boosting your feelings. Not causing deliberate harm).