Drug and Alcohol Testing Q&A - 2008

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Re: Marijuana positive and injury causation

From: Robert Swotinsky MD
Password: orange
Date: 13 May 2008
Time: 09:47:10 -0700
Remote Name: 68.184.42.162

Comments

If you can charge for your time spent responding to this question, then respond that the marijuana positive drug test result does not, by itself, provide enough information to support an opinion about causation. If the positive result was supported by other evidence of recent use, e.g., eyewitness accounts of the guy smoking marijuana right before the accident, it might then be supportive of an opinion of impairment and potential causation. By the way, realize that in drug testing we test for a pharmacologically inactive metabolite, THCA.