Prenatal maternal indomethacin use resulting in prolonged neonatal renal insufficiency.

The short-term use of indomethacin has been shown to be relatively safe and effective in halting premature labor. Its use has been associated with adverse renal effects in both the fetal and newborn periods that are generally transient and resolve on discontinuation of the drug. However, limited data suggest that prolonged prenatal exposure to indomethacin may be harmful to the fetus. We report a case of prolonged severe renal dysfunction characterized by oligohydramnios and postnatal anuria, azotemia, and ultrasonographic kidney abnormalities associated with the long-term prenatal use of indomethacin. Although partial resolution was observed, a moderate decrease in renal function persists. Prenatal maternal indomethacin use represents a potential cause of renal dysfunction in the newborn infant that may be only partially reversible.