Adriano admits he was suicidal while at Inter Milan.
The former Brazil star is now hoping to resume his playing career this season.
He told Globoesporte: "I called my mother to tell her that I was lonely, I missed home and I thought about suicide. I was at Inter, that year.
"I returned to Brazil. I started to go to the psychologist to stop with alcohol.
"But now I no longer need him and I'm happy."