I'm ashamed to say I've done similar in the not so distant past. For me it wasn't a suicide attempt either, just a way to escape into nothingness for a while and a lack of caring about what might happen. It was very out of character for me, never did anything like it before and haven't since. I think it might have been related to my starting Seroquel shortly before that.

Anyway, I did tell my Pdoc. He did not pull my meds. I think because he knows this was out of character for me and I am usually very responsible with meds, so he gave me another chance. I think it very much depends on your relationship with your Pdoc, whether you trust them enough to tell them that and they trust you enough to not overreact (even though this is of course a serious thing).