A joint investigation by the Boston Globe and the medical news site Stat has chronicled new and disturbing allegations of treatment of guests who came to McGraw for help with substance abuse struggles.

The expose presents accounts from multiple guests on his syndicated show who say their addictions were enabled by members of McGraw’s staff in hopes of boosting ratings.

Todd Herzog, who struggled with alcohol abuse in the years after winning “Survivor,” said that when he arrived at the Dr. Phil Los Angeles studio in 2013, he found a bottle of vodka in his dressing room and was given a Xanax to “calm his nerves.” Herzog had to be carried on set before his sit-down with McGraw, and registered a .263 blood alcohol content — more than three times the legal limit.

The health and welfare of other guests was put at risk by staff members, who allegedly played a role in their search for drugs, family members told the Globe and Stat reporters. The investigation also looked into the level of medical care guests with addiction issues received while filming in Los Angeles, as well as McGraw’s relationship with the treatment centers his guests are often referred to. Centers that buy “Dr. Phil’s Path to Recovery” have been promoted on the “Dr. Phil” show.