<p>Following oral administration, furosemide is absorbed from the gastrointestinal tract.<sup class="text-reference-group"><a class="reference-popover-link" data-content="Lasix Oral (furosemide) Product Monograph" href="#reference-L9659">12</a></sup> It displays variable bioavailability from oral dosage forms, ranging from 10 to 90%.<sup class="text-reference-group"><a class="reference-popover-link" data-content="Oh SW, Han SY: Loop Diuretics in Clinical Practice. Electrolyte Blood Press. 2015 Jun;13(1):17-21. doi: 10.5049/EBP.2015.13.1.17. Epub 2015 Jun 30. (PubMed ID 26240596)" href="#reference-A31831">4</a></sup> The oral bioavailability of furosemide from oral tablets or oral solution is about 64% and 60%, respectively, of that from an intravenous injection of the drug.<sup class="text-reference-group"><a class="reference-popover-link" data-content="Furosemide - FDA Label" href="#reference-L7958">9</a></sup></p>