Steve Dymond, 63, died seven days after filming the show in May 2019.
He had taken a lie detector test for the ITV programme after being accused of cheating on his ex-fiancee Jane Callaghan.
The inquest at Winchester Coroner's Court heard that he died at his home in Portsmouth of a combination of morphine overdose and left ventricular hypertrophy in his heart.
Mr Dymond's son Carl Woolley told the hearing that on the day of the filming he received a call from his uncle, Leslie Dymond, to say his father was "very down".
Upset
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