cannabis should be used under the direction of a licensed healthcare provider. This site is intended for adults and legal medical marijuana patients and contains links to products we sell on our marketplace. A false-positive on a drug test could have implications for people at work, and in their medical care. For example, some health care organizations do not allow patients to start opioid painkillers if they use marijuana. Marijuana and hemp are two extremely different strains of the same cannabis sativa plant that have been bred over thousands of years to have entirely different purposes.