The purgative action of buckthorn is said to be similar to that of rhubarb. It works without irritating the system and can be used for all conditions causing or associated with constipation, including liver and gallbladder problems. It produces no constipative backlash after purgation as some other remedies do, neither does it become less effective with repeated use.
With medical approval, a mixture of equal parts buckthorn, senna leaves, milfoil, and witch-grass root may be used during this time. Buckthorn tea is also said to be good for lead colic, obesity, dropsy, and hemorrhoids.