Citrini solunt coleram rubiam: i.e. the citrini purge choler primarily; and according to Avicenna, a little of phlegm. For that reason when administered in water in which rose and myrtle have been boiled it is suitable for those who have jaundice, tertian fever, and dysentery. However, should it be necessary to cause depletion by myrobalan, let it be done in fear and with caution. For that reason it is proper to mix tragacanth with it, so that it does not aggravate ulcers of the intestines. Dosage, maximum dose of it when given in a draught for dysentery, four drams; and when given for tertian fever, one ounce indeed is the maximum amount.