A fun-loving dad hanged himself after taking club drug mephedrone.
Mark Jolly, 30, became aggressive and depressed after using the drug - also known as meow meow - an inquest was told.
He was found by his brother hanging from railings at his flat. Mr Jolly, described as "bubbly" by his family, had earlier taken mephedrone - legal at the time but which has since been banned.
Days after his death another man from Bolton, Wesley Sharples, 23, killed himself with a shotgun, after taking the drug.
The inquest heard nine more "otherwise happy people" across Britain had killed themselves after taking the drug.
Pathologist David Bissett told the inquest at Bolton coroner's court the effects of the drug were not yet properly known.
Assistant deputy coroner Peter Watson recorded an open verdict.
By Stephen White
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