oral bioavailability<\/a>\n of ~60 %. Peak plasma drug concentrations are reached 1-2h after oral \nadministration. Because furosemide is bound extensively to plasma \nproteins, its delivery to the tubules by filtration is limited. However,\n it is secreted efficiently by the organic acid transport system in the \nproximal tubule and thereby gains access to its binding sites on the \nNa-K-2Cl symporters in the luminal plasma membrane of the thick \nascending limb. \n<\/p>\n\n\n\n
Approximately 65% of furosemide is excreted \nunchanged in the urine, and the remainder is conjugated to glucuronic \nacid in the kidney. Accordingly, in patients with renal, but not liver, \ndisease, the elimination half-life of furosemide is prolonged. The \nelimination half-life is short.
<\/p>\n\n\n\n
Clinical implications<\/h3>\n\n\n\n
The optimal drug plasma concentration depends on \nthe targeted diuretic effect. About 1h after oral administration of 40 \nmg Furosemide, plasma drug concentrations of 2-3 microg\/ml have been \ndetermined, and maximal plasma concentrations after i.v. injection of 40\n mg Furosemide were 6-12 ?g\/ml.\n<\/p>\n\n\n\n
Adverse effects of loop diuretics unrelated to the \ndiuretic efficacy are rare, and most adverse effects are due to \nabnormalities of fluid and electrolyte balance. However, loop diuretics \ncan induce ototoxicity.\n<\/p>\n","protected":false},"excerpt":{"rendered":"
Furosemide pharmacokinetic parameters Oral bioavailability (F) 65% Clearance (CL) 7 L\/H Volume of distribution (Vd) 9 L Half-life (t1\/2) 1 h Description Furosemide is a diuretic that is used in anti-hypertensive therapy and for the relief of edema. After oral administration furosemide is rapidly but incompletely absorbed, resulting in an oral bioavailability of ~60 %. Peak … <\/p>\n
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