A barbiturate (a drug that acts as central nervous system depressant, i.e. sodium thiopental or propofol) in combination with a muscle relaxant. Death cause: oxygen deficiency, within seconds.<p>Source: <a href="https:&#x2F;&#x2F;nl.wikipedia.org&#x2F;wiki&#x2F;Euthanasie" rel="nofollow">https:&#x2F;&#x2F;nl.wikipedia.org&#x2F;wiki&#x2F;Euthanasie</a> (dutch)