The former child star, who came to fame in the 1990s at shows such as Nickelodeon's "All That" and "The Amanda Show," said she has been sober for four years and is currently enrolled in the Fashion Institute of Design and Merchandising.
She continued to make headlines that year by a series of shocking tweets that included false accusations of abuse against her father.
"Everyone is different, obviously, but for me, mixing marijuana and any other drugs and sometimes drinking really messed up my brain," Bynes explained. "It really made me a completely different person.I really am a good person.I would never feel, say or do any of the things I did and told people that I hurt on Twitter."
She said the combination of marijuana use and a change in her agenda contributed to her spiral.
"I just had no purpose in life. I was working all my life and [now] I was not doing anything, "continued Bynes. I had a lot of time in my hands and I "woke up and baked" and literally got stoned all day … [I] I was just stuck at home, getting stoned, watching TV and tweeting … I've never done heroin or methamphetamine or anything like that, but certain things that you think are harmless, they can actually affect you in a more damaging way. "
"It's definitely not fun when people diagnose you with what they think you are," Bynes said. "It has always been very uncomfortable for me.If you deny anything and tell them what it really is, they do not believe you.Really for me, [my behavior] was induced by drugs, and whenever I left [drugs]I was always back to normal. I know my behavior was so strange that people were just trying to figure out what was wrong. "
Bynes said he hopes to launch a clothing line and eventually return to acting. She also hopes that her experience will serve as a cautionary tale to others.
"Be very, very careful, because you can lose everything and ruin your whole life like I did," she said.