where a person causes death by withholding or withdrawing treatment that is necessary to maintain life, such as withholding antibiotics from someone with pneumonia
this is when life-sustaining treatments are withheld. The definition of passive euthanasia is often not clear cut. For example, if a doctor prescribes increasing doses of opioid analgesia (strong painkilling medications) which may eventually be toxic for the patient, some may argue whether passive euthanasia is taking place - in most cases, the doctor's measure is seen as a passive one. Many claim that the term is wrong, because euthanasia has not taken place, because there is no intention to take life.