As more states legalize marijuana, there are efforts underway to develop drugs to help with addiction.
Currently, there are no FDA-approved drugs to treat what's known as "Cannabis Use Disorder."
Studies suggest 30% of people who use marijuana may have some degree of use disorder.
It can include cravings, neglecting other obligations, causing a disruption in the user's life, and withdrawal symptoms if a person tries to quit.
Meg Haney is the director of the Cannabis Research Lab at Columbia University Medical Center.
Her team has been doing lab work on a drug for "Cannabis Use Disorder" that a U.K.-based company is working on.
That drug is moving forward in clinical trials.
A big study at sites across the U.S. is expected to start next year.