At one point, the man became so inebriated that he fell and experienced bleeding in his brain. He was taken to a neurosurgical center where he spontaneously recovered in 10 days, researchers said.

“In this institution, his blood alcohol levels ranged from 50 to 400 mg/dL,” the researchers wrote. “Here too, the medical staff refused to believe that he did not drink alcohol despite his persistent denials.”

Finally, the man sought help from an online support group and got in touch with the researchers at the Richmond University Medical Center, who said in the study that they believed the antibiotics he took years ago altered his gut microbiome and allowed fungi to grow in his gastrointestinal tract.