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Effects of Various Modalities of Oral Furosemide Administration in Mild or Severe Congestive Heart Failure

Department of Intenal Medicine "A"

Victor Dishi

Department of Intenal Medicine "A"

Ronit Zaidenstein

Department of Intenal Medicine "A"

Stefan Soback

Department of Nephrology Division, Assaf Harofeh Medical Center. Zerifin. Affiliated to the Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv

Joshua Weissgarten

Department of Kimron Veterinary Institute. Beit Dagan. Israel.

Zhan Averbukh

Department of Kimron Veterinary Institute. Beit Dagan. Israel.

Marina Gips

Department of Nephrology Division, Assaf Harofeh Medical Center. Zerifin. Affiliated to the Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv

Alex Blatt

Department of Intenal Medicine "A"

Silvia Berman

Department of Kimron Veterinary Institute. Beit Dagan. Israel.

David Modai

Department of Intenal Medicine "A"

Background: This study evaluated the optimal formulation (tablet vs solution) and frequency (once vs twice daily) of maintenance oral furosemide in compensated congestive heart failure (CHF).

Methods and Results: Eighteen patients with mild (group 1) and 18 with severe (group 2) CHF were studied. On 2 consecutive days each patient's individual fixed oral furosemide daily dosage was administered in tablet or solution in a crossover design. In an additional study. 14 patients with severe CHF received the daily dosage in tablet or solution form in two divided doses. Pharmacokinetic data were obtained in six randomly allocated patients of each group, during the once daily administration periods of either formulation. Twenty-four-hour urinary sodium and 12-hour volume were significantly greater in group 1 following furosemide solution versus tablets. In group 2, all parameters were comparable in response to single identical doses in tablets or solution. as well as to once versus twice daily administration of either formulation. These results coincided with a higher C_max and a shorter t_max following solution.

Conclusions: A once-daily oral furosemide solution is more effective than the same dosage in tablet form in patients with mild, but not those with severe, CHF. In patients with severe CHF. the natriuretic and diuretic effects are similar whether oral furosemide in tablet or solution is administered in a once or twice daily schedule.

Key Words: furosemide tablets • furosemide solution • congestive heart failure

Journal of Cardiovascular Pharmacology and Therapeutics, Vol. 1, No. 4, 271-278 (1996)
DOI: 10.1177/107424849600100402


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