The relationship between the intracanular concentrations of unbound (free) furosemide and its natriuretic effect is in the form of a sigmoid curve with a minimum effective furosemide excretion rate of about 10 g / min. Therefore, prolonged infusion of furosemide is more http://canadaslim.net/buy-lasix/ effective than repeated bolus administration. In addition, if a certain bolus dose is exceeded, no significant increase in the effect is observed. When the tubular secretion of furosemide decreases or when the drug binds to the albumin located in the lumen of the tubules (for example, in a nephrotic syndrome), the effect of furosemide decreases.