As Mark Fleischman drank the sodium pentothal that would kill him on Wednesday, he gazed at Mimi, his wife of 27 years. 

“We looked at each other like, ‘This is crazy in a way.’ My feeling was, ‘Wow. I can’t believe this is happening,'” she told The Post. “I had a hand on Mark’s knee. The sodium pentothal is bitter. So they recommended following it with chocolate and a sweet drink. He ate it and drank it. Then, a minute later, he looked around and said, ‘I don’t feel anything.’ I think it was a throwback to his drug-taking days. Three or four minutes later, he was asleep.”

Mimi Fleischman was with her husband Mark as he ended his life in Switzerland.Paul Bruinooge/Patrick McMullan

As The Post reported last month, 82-year-old Fleischman — the former owner of Studio 54 — decided to end his life by assisted suicide at the Swiss headquarters of Dignitas. Located near Zurich, inside what looks like a ranch-style home, the non-profit organization legally provides heart-stopping drugs to those who suffer from terminal or severe illnesses.

Fleischman, who paid $15,000 to die, was wheelchair-bound and afflicted with a debilitating disease that could not be diagnosed or treated.