On Thursday, Pinellas Park police received the final test results, which indicated a positive reading for gamma hydroxybutyric acid or GHB, Captain Sanfield Forseth told the newspaper.
The reading was verified by a second laboratory, Forseth said.
The amount of GHB in the sample - 870 micrograms per milliliter - is four times what one would expect to see in the urine of someone who received a prescribed, legitimate dose, said Cynthia Lewis-Younger, the medical director for the Florida Poison Information Center in Tampa.
The Food and Drug Administration has approved GHB as a treatment for narcolepsy, a sleep disorder.
"We're told by the experts that this is a level that would make you impaired," Bruce Bartlett, chief assistant state attorney at the Pinellas-Pasco State Attorney's Office, told the Tribune
"The amounts associated with incapacitation are surprisingly small in a lot of cases," Lewis-Younger said.