Which drug is excreted unchanged in urine ?
Ans. is 'b' i.e., Furosemide Furosemide pharmacokinetics Furosemide is rapidly absorbed orally but bioavailability is about 60%. Lipid solubility is low and it is highly bound to plasma proteins. It is pay conjugated by glucuronic acid and is mainly excreted unchanged by glomerular filtration and tubular secretion.
Verapamil
Furosemide
Propranolol
Thiopentone