"I relapsed. Not proud of it. But I am back on track," she said at the time.
Osbourne added on her podcast appearance that she could have continued on without sharing her struggles, but chose not to.
"The reason I shared it, because I could have gone on and nobody would have f**king known, nobody would have known... I live a life of rigorous honesty," she continued. "If I'm not honest, I get sicker. They say in the program, 'You're only as sick as your secrets.' And I don't want to have any secrets."
Though she didn't go into detail about her relapse, Osbourne did note, "I caught myself before I went too far."
Osbourne plans to go in-depth about her sobriety struggles as well as her weight loss journey on her upcoming podcast, The Kelly Osbourne and Jeff Beacher Show, which premieres May 4.