They might be poison to eat, you might be abe to decoct the sap out by heating in water for a long time and slowly boiling it down ito a thick tarryl-like goo that will harden into a hard plastic like gum, but be careful not to burn it. I wouldent eat it though. The raw opium itself is not very useful as a narcotic, It is used to extact the morpnine, the purified morphine is then refluxed in acetic anhydride to form acetylated morphine.