Can I drive while using medical marijuana? You are prohibited from driving a vehicle while under the influence of marijuana. All FAQ’s from General Are there different kinds of medical marijuana? How much does it cost to obtain a medical marijuana card? How much medicine can I have with my card? Is the Rhode Island Medical Marijuana Card recognized by other states? Is there marijuana which won’t get me high? What forms does marijuana come in? What is a caregiver? What is the impact of possessing a medical marijuana card on employment? What should I tell my employer if I am subjected to a drug test? Where can I use my medication? Where do I get medical marijuana medication? Who may use medical marijuana?