Development of Medicine science of Muslim who lived in Andalusia began from half of 3rd century A.H. /9th A.D., from the days of Muh?ammad ibn ‘Abd al-Rah?man awsat?. Pharmacology as dependent science has passed the evolutionary procedure along with medicine, but the Andalusia physicians’ attention to the subject of drugs (mofradat) of medicine caused them to pay more attention to pharmacology to the extent that it became the dominant medical approach. Some of the factors, though not with the same importance, have helped this Andalusian approach. In this article attempt to study of these effective factors in this approach of Andalusian medicine.