Because of the conflict of the different diseases, let the medicine be compounded, for when any disease has been developed from different items according to nature and quality it is necessary to expel it by a medicine which is correspondingly different as regards nature and quality. According to Constantinus, should theriac be compounded from numerous simples the reason for it is that it has the power to combat pestilential diseases and deadly poisons.
The second of the four causes, which cause is based on the affected members: governed by two circumstances let the medicine for this be compounded. First