<p>Corticosteroids are eliminated predominantly in the urine.<sup class="text-reference-group"><a class="reference-popover-link" data-content="Czock D, Keller F, Rasche FM, Haussler U: Pharmacokinetics and pharmacodynamics of systemically administered glucocorticoids. Clin Pharmacokinet. 2005;44(1):61-98. doi: 10.2165/00003088-200544010-00003. (PubMed ID 15634032)" href="#reference-A187436">12</a></sup> However, data regarding the exact proportion is not readily available.<sup class="text-reference-group"><a class="reference-popover-link" data-content="Jung C, Greco S, Nguyen HH, Ho JT, Lewis JG, Torpy DJ, Inder WJ: Plasma, salivary and urinary cortisol levels following physiological and stress doses of hydrocortisone in normal volunteers. BMC Endocr Disord. 2014 Nov 26;14:91. doi: 10.1186/1472-6823-14-91. (PubMed ID 25425285)" href="#reference-A188387">7</a></sup></p>