EDISON - Facebook has shut down the business pages of three of New Jersey's five medical marijuana dispensaries.

The social media giant has taken similar measures against dispensaries in other states such as California.

Facebook's advertising policy bans promotion of drug use - as well as tobacco products and guns. The company did not immediately comment on its actions in New Jersey.

Dispensaries and medical marijuana advocates said Facebook pages are integral for customers to learn about which plant strains best treat their illnesses and where to find discounts. The pages also facilitate ongoing discussions among customers and with purveyors about the benefits and drawbacks of certain strains.

The dispensaries that lost their Facebook pages are Compassionate Sciences in Bellmawr, Garden State in Woodbridge and Breakwater Treatment and Wellness in Cranbury.

Other social media accounts for the dispensaries such as Twitter and Instagram remain active.

The Associated Press wire services contributed to this report.