MC's mother starts taking his pills to help her cope with stress. Her child (18, lives at home) has physical and mental issues, so these could be a number of types of medication, though mostly psychoactive: tranquilizers, pain pills, SSRIs. My question is, could an overdose/long term drug abuse cause her to die a slow death, even if she stops taking them? And if not, what would? I'm willing to change the situation if need be. The plan is for her to get progressively weaker over the course of a couple of months, during which her family cares for her, and then pass away at home. Thanks.