Marijuana Relieves Chemo Patients' Nausea

August 23, 2006

CN, Windsor Star (Canada)

 Marijuana may help prevent nausea in certain situations -- relief  many cancer chemotherapy patients can't obtain from existing drugs,  says a University of Guelph psychology professor.

Linda Parker's research was published in recent issues of the journal  Physiology and Behavior.

Many chemotherapy patients vomit walking into clinics in anticipation  of treatment. The symptoms can deter some patients from continuing  with recommended treatment, said Parker, a behaviour neuroscientist.

"Known antiemetic drugs aren't effective in treating this learned  nausea," she said.

Medication can control vomiting in 60 to 70 per cent of chemotherapy  patients, but many still suffer from nausea.

Using rats and shrews, Parker has been able to determine how two  compounds found in marijuana -- THC (the chemical that makes people  feel high) and cannabidiol (CBD) -- can treat vomiting and nausea.

"People report that if they smoke marijuana before they go for  chemotherapy treatment, they don't experience the anticipatory nausea  or vomiting," Parker says.

She's been collaborating with THC discoverer, Raphael Mechoulam, at  the Hebrew University in Jerusalem.

Mechoulam also discovered the natural chemical in the body that acts  on the same brain receptor (cannabinoid receptors) responsible for  marijuana making people high - the equivalent of endorphins for  morphine. It's called anandamide, known as "the brain's own THC," and  Parker is looking at the role it plays in nausea and vomiting.

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