Assertion: morphine's life | /r/HasProperty | increased in patient
Facets:
value: over the age of 65 years
type: TEMPORAL
value: due to changes in clearance
type: CAUSE
Source sentences:
text: Due to changes in clearance, the mean half-life of butorphanol is increased by 25% (to over 6 hours) in patients over the age of 65 years (see CLINICAL PHARMACOLOGY: Pharmacokinetics).