Paternalism and Health

Paternalism and Health: Some diseases such as Alzheimer’s inhibit our abilities to make decisions and lessen our quality of life. In cases like these, we often think that others are justified in stepping in and making decisions for that person. But what about the case where the person in question is relatively healthy but suffers, perhaps, from minor depression, or an anxiety disorder? When (if ever) is it OK to step in and take charge of someone else’s life or body?