Ricinus communis
di E. A. Farrington — A Clinical Materia Medica
has the effect of increasing the quantity of milk in nursing women.
It is here similar to Urtica urens, which is an excellent remedy for absence of milk after confinement.
Castor oil, when abused, is antidoted by two medicines, according to the respective characteristics, Bryonia and Nux vomica; Bryonia from a specific relation to the symptoms of Ricinus, and Nux from its relation to drastic remedies in general.