An employment agency in Oregon said that the State of Oregon classifies Medical Marijuana as a Drug and the company supports a Drug Free Work Zone. She said the card is not a perscription. But I needed MD records to qualify for the card in the first place. I thought it was the company's own policy; but they said its due to State laws.
http://www.oregon.gov/DHS/ph/ommp/top20.shtml#15
15) What should I tell my employer if I am subjected to a drug test?
The Oregon Medical Marijuana Act states that employers are not required to accommodate employees who use medical marijuana. You may wish to consult an attorney about whether or not to tell your employer that you are a patient in the OMMP. A patient may contact the OMMP in writing to ask the Program to release information about the patient’s registration to an employer.
Had prop 19 passed in Cali it would have protected smokers from being fired for a positive test but allowed companies to discharge a worker who worked under the influence.