Roma striker Luca Toni admits he's shocked by Adrian Mutu's latest drugs controversy.

Toni's former team-mate at Fiorentina twice tested positive last month for anti-obesity drug sibutramine.

Mutu is temporarily suspended and could face a lengthy ban.

"It is inexplicable," said Toni to Italian newspaper Il Messaggero."It's incredible.

"He has no reason to lose weight and I ask myself how come he took that drug.

"It's stupid to throw away everything just like that.

"We know there are anti-doping controls done and that we cannot take anything that is banned.

"It's like going at 150km against a wall, you may escape unharmed but the likelihood is that you risk getting hurt."

Romania international Mutu served a seven-month ban five years ago and was sacked by Chelsea after testing positive for cocaine.