A mother has gathered almost 50,000 signatures calling on the federal government to mandate health warning labels on the anti-smoking drug, Champix.

A Gold Coast mother whose son took his own life while taking the anti-smoking pills Champix is lobbying the federal government to put warning labels on the drug.

Timothy Oldham died in 2013, eight days after he started taking the medication.

His mother, Phoebe Morwood-Oldham, has collected almost 50,000 signatures on a change.org petition to federal health minister Sussan Ley, asking that she mandate high-level health side-effect warning labels similar to those used on Champix boxes in the US.

The Queensland coroner has already agreed to reopen an investigation into Timothy's death to determine whether there is any link with his use of Champix.

Drug company Pfizer Inc has already settled thousands of lawsuits in the US by people claiming they suffered physical and mental health issues while taking the medication.

However a recent study of 150,000 smokers in England found those using the drug were not at a greater risk of depression or self-harm.

Readers seeking support and information about suicide prevention can contact Lifeline on 13 11 14 or Suicide Call Back Service 1300 659 467.