A top health agency has formally revised federal workplace drug testing guidelines to clarify that using medical marijuana under a doctor’s recommendation in a legal state is not a valid excuse for a positive THC test. In a pair of notices set to be published in the Federal Register on Thursday, the Substance Abuse and […]

A top health agency has formally revised federal workplace drug testing guidelines to clarify that using medical marijuana under a doctor’s recommendation in a legal state is not a valid excuse for a positive THC test. In a pair of notices set to be published in the Federal Register on Thursday, the Substance Abuse and  Read More  

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