An adult who makes an unusual decision about medical treatment (for example, refusing to go to hospital even though they are having a heart attack and know they might die) lacks decision-making capacity.
No. An adult is presumed to have capacity to make decisions. An adult with capacity is legally entitled to make decisions that others disagree with. However, a decision that a health professional regards as an unwise or unusual decision may be a prompt for clinicians to check the person’s capacity.