The 27-year-old singer, who is back in the spotlight after a hip injury, said she turns to marijuana to deal with the challenges in her music career, reported People magazine.
"I have been addicted to it and it's ultimately related to anxiety coping and it's a form of self-medication and I was smoking up to 15-20 marijuana cigarettes a day with no tobacco," she said on Elvis Duran and The Z100 Morning Show.
"I was living on a totally other psychedelic plane, numbing myself completely, and looking back I do see now that some of it had to do with my hip pain. I didn't know where the pain was coming from so I was just in a lot of pain and very depressed all the time and not really sure why," she said.
"The truth is that it is very hard to be famous. It's wonderful to be famous because I have amazing fans. But it is very, very hard to go out into the world when you are not feeling happy and act like you are because I am a human being too and I break, and I think there is an assumption... That I cannot break because I am an alien woman and I am unstoppable.
"The truth is that I can break, and I did. I was not very good at breaking. I lost everything that I love. I was in a wheelchair for six months. I did a lot of drugs and took a lot of pills," Gaga said.
"I do put that pressure on myself; I have to be high to be creative. I need that, that's an error in my life that happened for over 10 years. Can I be brilliant without it? I know that I can be and I have to be because I want to live, and I want my fans to want to live," Gaga said.