The SkinnyGirl mogul said in May that she and Shields had been on and off for years, and they were like a partnership. While the assistant administered the drug, he lost consciousness before the medication went into effect.
The medical examiner will determine the cause of death.
Shields was in an on-again, off-again relationship with Real Housewives of NY star Bethenny Frankel.
HollywoodLife will be updating this story if more RHONY co-stars comment on Dennis Shield's death. The New York Police Department told TooFab emergency medical services arrived at the Manhattan high rise at 9:19 a.m. local time, when a man was found unconscious and unresponsive upon arrival.
Britain welcomes United States sanctions on Russian Federation over Salisbury nerve agent attack
The announcement of U.S. sanctions caused the value of the ruble to plunge early Thursday and Russian stock markets to fall. The second round would be more punitive and could include the suspension of Aeroflot flights into the United States.
He and Frankel began dating in 2016, but endured a number of ups and downs, and in May, The Real Housewives of New York City regular admitted the relationship was complicated. "His spirit lives on in our children".
According to reports, while some of the residents only learned on the blaze on television, Shields got a personal call from former Trump lawyer Michael Cohen telling him to get out.
Dennis and Bethenny are thought to have been now not dating.
In May, she appeared on Steve Harvey's talk show, where she talked about the status of their relationship.
"I am sure this does not come as a surprise to any of the viewers, all of whom have been supportive, encouraging, and kind", she said in a statement to PEOPLE.
Bethenny has not yet addressed the news and is thought to be at her home in Bridgehampton.