About: http://webisa.webdatacommons.org/118752598

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	They have a similar effect on pain to drugs such as morphine and codeine, but do not lead to dependence.
http://www.w3.org/ns/prov#wasQuotedFrom	blogspot.com