title: A comparative study of the diuretic, natriuretic, and kaluretic effects of furosemide when administered at 07:00 h and at 19:00 h.
abstract: Furosemide (0.5 mg/kg, i.v.) was administered to 31 healthy, day-active adults (Group 1) at 07:00 h (study 1) and urine output during the next 2 h was collected. Urine volume, urinary sodium, potassium and creatinine were determined. After 60 h, furosemide (0.5 mg/kg, i.v.) was administered at 19:00 h (study 2) and urine output during the subsequent 2 h (19:00 h to 21:00 h) was collected for estimation of urine volume, sodium, potassium and creatinine. Twenty-two healthy, day-active adults (Group 2) who constituted the control group underwent study 1 and study 2 and received 2 ml of normal saline instead of furosemide. There was no significant difference in urinary volume, urinary sodium, potassium and creatinine excretion between study 1 and study 2 in the control subjects (Group 2). In contrast, administration of furosemide at 07:00 h (study 1) resulted in greater diuresis (247.1 +/- 202.07 ml), more marked sodium excretion (42.66 +/- 29.06 mmol), increased potassium excretion (5.14 +/- 4.014 mmol), and greater creatinine excretion (0.415 +/- 0.414 mmol) as compared to study 2. In conclusion, the diuretic, natriuretic and kaluretic effects of furosemide are greater when administered at 07:00 h than at 19:00 h. Therefore, in clinical practice, the time of administration of furosemide can be so chosen as to achieve a greater diuresis or to prevent a marked loss of sodium.
authors.affiliation: Department of Urology, Postgraduate Institute of Medical Education and Research, Chandigarh, India.
authors.forename: A K
authors.initials: AK
authors.lastname: Hemal
authors.forename: S K
authors.initials: SK
authors.lastname: Thind
authors.forename: R
authors.initials: R
authors.lastname: Nath
authors.forename: H K
authors.initials: HK
authors.lastname: Sidhu
authors.forename: A
authors.initials: A
authors.lastname: Sankaranarayanan
authors.forename: S
authors.initials: S
authors.lastname: Vaidyanathan
mesh_terms: D000328:Adult; D003404:Creatinine / Q000652:urine; D004231:Diuresis / Q000187:drug effects*; D005665:Furosemide / Q000008:administration & dosage / Q000494:pharmacology*; D006801:Humans; D007275:Injections, Intravenous; D009318:Natriuresis / Q000187:drug effects*; D011188:Potassium / Q000652:urine*; D012964:Sodium / Q000652:urine; D013997:Time Factors
chemical_list: D005665:Furosemide; D012964:Sodium; D003404:Creatinine; D011188:Potassium