<p>The volume of distribution of morphine is 5.31L/kg.<sup class="text-reference-group"><a class="reference-popover-link" data-content="Hoskin PJ, Hanks GW: Morphine: pharmacokinetics and clinical practice. Br J Cancer. 1990 Nov;62(5):705-7. (PubMed ID 2245160)" href="#reference-A176119">6</a></sup> Morphine-6-glucuronide has a volume of distribution of 3.61L/kg.<sup class="text-reference-group"><a class="reference-popover-link" data-content="Hoskin PJ, Hanks GW: Morphine: pharmacokinetics and clinical practice. Br J Cancer. 1990 Nov;62(5):705-7. (PubMed ID 2245160)" href="#reference-A176119">6</a></sup></p>