3/25/10

Dr. says MDs should not encourage pot use

(A letter from Dr. Meldon Kahan to the National Post on March 2, 2010)...

Re: How To Get Your Medicinal Pot, letter to the editor, Feb.  27.

Dr. David Saul implies that if patients request a Health Canada cannabis authorization form, physicians are obliged by the provincial medical college to sign the form or refer them to a physician who will.  This is incorrect and it is reckless to promote cannabis as a harmless medicine.  I have seen patients whose lives have been destroyed by cannabis addiction or cannabis-induced psychosis.  Smoked cannabis has been shown to cause precancerous changes in various tissues.  Also, THC serum levels rise rapidly when smoked, creating a risk for motor vehicle accidents.  The oral and inhaled versions of cannabis are far safer.

I would discourage physicians from authorizing smoked cannabis.  They should prescribe oral or inhaled cannabis only for patients with a medical condition for which cannabis has been shown to be effective, and who are at low risk for cannabis-related harms. 

Dr.  Meldon Kahan, medical director,
Addiction Medicine Service, St.  Joseph's Health Centre, Toronto

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