Celebrity chef Gordon Ramsay has said he is going to drug-test every new member of staff starting work at his west London restaurant.
David Dempsey was described as "talented"
The move follows the death last month of David Dempsey, 31, head chef at Restaurant Gordon Ramsay in Chelsea.
He fell 40 foot from the second floor an apartment block off the Kings Road after smashing up one of the flats with a golf club in what witnesses said appeared to be a drug-induced rampage.
An inquest into Mr Dempsey's death has been opened and adjourned at Westminster Coroners Court and is awaiting toxicology reports.
His sister Eileen has said he was "anti-drugs".
In an interview with Observer Food Monthly, Ramsay said he was "very close" to Mr Dempsey, describing his death as "a waste of talent and energy".
Gordon Ramsay's brother was a heroin addict
"What he's supposed to have done was horrific," said Ramsay.
"We will try to come to terms with what's happened to David and we're going to emphasise our zero tolerance on drugs," he told the magazine.
"In future, I'd like every new member of staff to give a urine sample so we can see any substances they've taken in the last six months."
Father-of-four Ramsay said his own anti-drugs stance had been shaped by his younger brother Ronnie's battle with heroin addiction.
"I can't tolerate drugs because Ronnie started on weed when he was 16 and by the time he was 19 he was a heroin addict," he said.
His restaurant empire includes the Michelin-starred Gordon Ramsay at Claridge's, Petrus, restaurants at The Connaught and the Savoy, and the newly-opened Boxwood at the Berkeley Hotel, all in central London.
He also owns Amaryllis, which holds Glasgow's only Michelin star.