You can change your instructions in medical directives any time. It is advisable to create a new form with your changed desires and discard the previous directive. Make a point to have discussions with your healthcare advocate about your future medical choices, including specifics about when and what medical treatment options you prefer. Be sure to inform your physician and your caregiving team if you change your medical directives.
Remember, the living will or advance directive to physicians will only be referred to when you are unable to communicate your own desires. If you are awake and able to say what you want, you are able to make your intentions known to your care team.