A Durable Power of Attorney allows you to choose an attorney-in-fact to act on your behalf if you become terminally ill or incapacitated. However, consider an Advance Health Care Directive allowing you to state your wishes regarding refusal or acceptance of life-sustaining treatments. In many cases, the Advance Health Care Directive has replaced the Durable Power of Attorney for Health Care as the better choice if you want to provide detailed instructions regarding your health care.