Anthraquinone laxatives such as dantron are associated with congenital malformations.41 and 42 Saline osmotic laxatives (magnesium citrate and sodium phosphate) can cause maternal sodium retention while castor oil can initiate premature uterine contractions.43 Mineral oils can theoretically affect maternal absorption of fat-soluble vitamins. In the case of Vitamin K this can lead to hypoprothrombinaemia and haemorrhage.44 Some laxatives can even produce neonatal diarrhoea.43 Stimulant laxatives such as senna should be used with caution in pregnancy. Senna can be excreted in breast milk.45 In general, the short-term use of stimulant laxatives is considered safe in pregnancy. However, as with the general population, long-term use should be avoided.