On May 29, police found Tiger Woods asleep at the wheel on a Florida road and arrested him on suspicion of driving under the influence.

Curiously, only one of these Drugs — Vicodin, which is also the only one approved for use in the United States — has the potential for side effects that are anything like what Tiger Woods experienced (drowsiness, confusion, and sluggishness).

The FDA warns that hydromorphone “may impair motor skills or judgments, making it unsafe to operate machinery, drive, or engage in other potentially dangerous activities.”

In fact, the U.S. National Library of Medicine says that combining either hydrocodone or hydromorphone with alprazolam could cause extreme sleepiness, lightheadedness, dizziness, difficult breathing, or unresponsiveness.

“Recently, I had been trying on my own to treat my back pain and a sleep disorder, including insomnia,” Woods said in a statement on Monday, “but I realize now it was a mistake to do this without medical assistance.