A gateway is a doorway. The gateway drug theory suggests that alcohol, cigarettes, energy drinks, CBD, and marijuana are the gateways to hard drugs. In the U.S., a study found that of the 111 million people who have used marijuana, only 4% have gone on to use hard drugs, and that marijuana use reduces the risk of abuse and dependence on opioid drugs such as morphine and heroin by 55%. Although marijuana is perceived by opponents of marijuana use as a gateway to hard drugs, it is often used as an exit from hard drugs rather than a gateway, and in some cases is used in combination for soft landings, called “drops” or “landings,” for various hard drug users. If marijuana is a gateway drug, then as the number of marijuana users increases, the number of users of other drugs should also increase. However, while the number of marijuana users has increased in recent years, there has been no trend toward an increase in the use of other drugs. From a different perspective, marijuana use can be seen as suppressing the use of other drugs, and the traditional gateway drug theory of marijuana as a gateway drug has collapsed.