One of Boston's top hospitals is seeing an increasing number of drug abusers shoot up on its property, a tactic experts say opioid addicts hope will save them from lethal overdoses.

Massachusetts General Hospital has equipped its security guards with the overdose antidote Narcan after seeing an increase in the past 18 months of addicts shooting up in MGH walkways, parking garages and bathrooms, where addicts tie emergency pull cords to their bodies in case they collapse.

Dawn Williamson, an MGH clinical specialist in addiction, tells the Boston Herald using drugs near the hospital is addicts' "way of kind of mitigating the risk."

Boston Medical Center is the only other city hospital that that equips security guards with Narcan, but Brigham and Women's Hospital will do so next month.