As many as 15 people have committed suicide and hundreds have thought of killing themselves while taking the popular quit-smoking pill 'Champix' since 2008, data from Australia's drug regulator revealed.

The Therapeutic Goods Administration (TGA) said 206 ''suicide-related events'' and 15 suicides had been linked to the drug, which has been prescribed more than a million times since becoming available on the Pharmaceutical Benefits Scheme two and half years ago.