In the following post I noted to you that 3 things must apply for it to be mortal sin.
As Jon has noted that a person not fully conscious would immediately dismiss it from being mortal sin. It is venially sinful and if they died in that state would most likely enter purgatory and later with our Lord in heaven. But only God knows in which state and the hearts of men as I’m sure you are aware of this.
Hope this helps.