RSO (Rick Simpson Oil). There are so many clips on how to make RSO on youtube.
Here is the one that Rick Simpson himself making oil video.
Here is more information on administering RSO suppository method.
The reason for the suppository method is high bioavailability. Cannabis suppositories deliver around 80 percent of the plant medicine while taking cannabis orally delivers around 35 percent and smoking around 15 percent. So, rectal delivery of cannabis provides the maximum amount of oil delivered with zero head high and no known side-effects.