Bass, Berry & Sims attorney Dustin Carlton discussed the tension that exists between state and federal laws regarding medical marijuana use in the workplace. While marijuana remains a controlled substance under federal law and currently illegal to use, many states have legalized the drug for medical and even recreational use. Many employers are faced with remaining compliant with these opposing laws. Dustin recommends employers review any current zero-tolerance policies in light of new state laws, “If you are a multi-state employer, you need to assume you need to make some modifications to tailor to each individual state, or make concessions in terms of past practices.”