Morphine may lead to cancer spread
Published:Monday | November 23, 2009 | 6:29 PM
Laboratory tests have suggested that morphine could encourage the spread of cancer.
Morphine is a narcotic drug which is routinely prescribed to relieve pain from surgery and tumours.
US scientists say the opiate promotes the growth of new blood vessels which deliver oxygen and nutrients to tumours.
The researchers also claim to have found a drug which counters this effect.
Cancer Research UK says more tests are needed before any changes in treatment.
Dr Patrick Singleton, from the University of Chicago, told the meeting of experts that in laboratory tests, morphine not only strengthens blood vessels, but also appears to make it easier for cancers to invade other tissues and spread.