Meyers, who plays Henry VIII in the series "The Tudors," is believed to have downed pills at his home.
Paramedics answering an emergency call found Meyers slumped on the floor.They had to call police after he refused treatment at the scene for more than 30 minutes. A source said: "This is very sad. It was the opinion of those present that he tried to take his life."
But Thursday, a source close to the actor told The Hollywood Reporter "It was not a suicide attempt. He did relapse and was hospitalized briefly for that, but was released."
The 33-year-old, who has been battling a drinking problem, was taken to a hospital near his home in Maida Vale, Central London, on Tuesday night.
He was discharged in the early hours yesterday. Asked later how he was, red-eyed Meyers told The Sun: "No comment."
A neighbor told The Sun: "I saw the ambulance arriving and was worried to death. Jonathan is a lovely guy. You see him all the time in the street. He says hello and is very pleasant. I hope he is fine."
Earlier this month, he checked into a five-star rehabilitation center in South Africa -- his fifth stint in rehab. Irish-born Meyers has starred in movies including "Alexander" and "Bend It Like Beckham" and is a former Hugo Boss model.
He has spoken before about his drinking problem. "When I do drink I'm like Bambi," he said. "I'm all over the place like a 16-year-old kid."
Last night Scotland Yard confirmed that "officers were called by London Ambulance Service following reports of a man refusing treatment. The man was taken to hospital."