PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • It is, however, less effective than morphine and needs a high concentration to achieve a reasonable degree of analgesia.[3] There is a high incidence of vomiting, and because it has both agonist and antagonist properties, it can precipitate withdrawal symptoms, including pain, in patients dependent on other opioids.
http://www.w3.org/ns/prov#wasQuotedFrom
  • patient.co.uk