Tiger Woods had five different drugs in his system when he was arrested on suspicion of driving under the influence (DUI) in May, according to a toxicology report.
A urine test revealed a mixture of strong painkillers, sleep and anxiety drugs, and THC, which is a chemical component of marijuana.
Woods, who is recovering from a fourth back operation, is now expected to admit a lesser charge of reckless driving and enter a 12-month probation programme.
"As I previously said, I received professional help to manage my medications," said Woods on Monday.
"Recently, I had been trying on my own to treat my back pain and a sleep disorder, including insomnia, but I realise now it was a mistake to do this without medical assistance."
Woods was arrested near his Florida home on May 29 after police found him asleep in his car on the side of the road.
He denied alcohol was involved and said it was down to "an unexpected reaction to prescribed medication".
The toxicology results, made public by the Palm Beach County Sheriff's Office, showed the presence of the below drugs, according to ESPN.
Vicodin (a generic form of painkiller), Dilaudid (a strong painkiller), Xanax (a mood and sleep drug), Ambien (a sleep drug), and THC (an active ingredient in marijuana).
Woods has not won a tournament since 2013, while his title drought in major championships dates back to 2008.
Last December, he returned to action after 15 months out injured, but has not played since his back problems recurred in February.
Now, after this arrest, Woods' future is certainly clouded and it is expected that he will officially announce his retirement from the sport.
This, along with his injuries, will set him back even further, and many will question if Woods still has what it takes to perform at the top level.
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