Chief executive of the mental health charity Sane, Marjorie Wallace, has told Daybreak that 'celebrities are sending out the wrong message on drug use'.
She said: "It is difficult to educate young people on drug abuse when celebrities are saying its fine.
"We need to say to these people, you are playing Russian roulette with your brain."
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Dr Michio Hirano denied having any financial interest in the experimental treatment considered for the baby.
The measures are set to be included in a court-mandated clean air strategy the Government is due to publish on Wednesday.