Police are probing if Sage was dealing in drugs after numerous pill bottles were found at the scene, reported TMZ online.
"I spoke to him a few weeks ago. We talked about resurrecting a film we worked on, other projects, talked about his girlfriend and time they would spent together. We talked about my wedding and he seemed to be thinking about it," Wozniak said.
He also said Sage suffered from anxiety and that he saw prescription medications like Vicodin, Klonopin and Paxil at his friend's house.
"Sage smoked two or three packs of cigarettes a day, though did not take recreational drugs and never drank. He would have withdrawal and get depressed. He would try to overcompensate. He would try to clown around and I know that those are things people do, medicate or wake up. He was no different," he added.
An autopsy on Sage was deemed inconclusive, while toxicology tests are not expected for several weeks.