Effects of ibuprofen and indomethacin on urinary antidiuretic hormone excretion in preterm infants treated for patent ductus arteriosus.

Objective: To compare the effects of intravenous ibuprofen and indomethacin for treatment of patent ductus arteriosus (PDA) on urinary antidiuretic hormone (ADH) excretion, as a cause of oliguria.

Study Design: Forty-four respiratory distress syndrome prematures (
Results: Indomethacin treatment caused a significant decrease in urinary ADH excretion (21.8 +/- 20.8 vs. 13.8 +/- 12.9 pg/ml; p < 0.05), along with a significant reduction in urinary sodium (92.1 +/- 36.1 vs. 64.8 +/- 35.6; p < 0.05), fractional excretion of sodium (68.5 +/- 37.1 vs. 45.6 +/- 37.1; p < 0.05), and urinary osmolality (276.2 +/- 103.9 vs. 226.4 +/- 60.3; p < 0.05). Ibuprofen treatment did not modify urinary ADH excretion and caused a statistically insignificant decrease in urinary sodium and in fractional excretion of sodium.

Conclusions: Compared with ibuprofen, indomethacin caused a significant reduction in urinary ADH excretion and a significant decrease in urinary sodium and osmolality.