Some states in the U.S. now allow patients to arrange for a doctor to prescribe a lethal dose of medication, which the patient then takes when he or she wishes to do so.
In a few countries, the laws go even further including The Netherlands, according to the Washington Post in "Elderly couple got 'deepest wish' -- to die together -- in rare euthanasia case."
Nic and Trees Elderhorst were both 91 years old and had been married for 61 years. He suffered from a stroke and she was diagnosed with dementia.
Their wish was to die at the same time, so they applied to be euthanized together. Their wish was granted and after sharing a final kiss, they were killed by doctors on July 4, 2017.
Reference: Washington Post (August 17, 2017) "Elderly couple got 'deepest wish' -- to die together -- in rare euthanasia case."