The 26-year-old starlet was taken into police custody early Thursday after an altercation with a woman at a Manhattan nightclub.
"I can tell you when I was with her this morning; she was in great condition," her attorney Mark Heller told E! News Thursday. "She was certainly not intoxicated, certainly not under the influence of drugs. She was clear [and] lucid, her eyes were clear. No alcohol involvement whatsoever on this occasion."
E! News said Heller admitted he didn't ask Lohan if she had been drinking or doing drugs at any point before she was accused of a punching a fellow clubgoer.
"It wasn't even brought up," he said. "She was perfectly appropriate. And the police made note of that."
Lohan, who was seen this week in the Lifetime television movie "Liz & Dick," is scheduled for arraignment Jan. 7.