Smith S K, Thompson D
Br J Obstet Gynaecol. 1977 May;84(5):344-7. doi: 10.1111/j.1471-0528.1977.tb12596.x.
Plasma potassium and urinary potassium excretion were measured in eight patients in premature labour treated with salbutamol, and in ten patients at full term in spontaneous labour. There was a significant fall in plasma potassium concentration following salbutamol infusion, but no change during labour in the control groups. Urinary potassium excretion was similar in both groups.