Legal high pioneer Matt Bowden has hinted he may return to the industry once the Government makes changes to legislation to make it safer.
Mr Bowden, who was known as the king of legal highs and introduced party pills to New Zealand, bowed out of the industry in 2011 when the Government moved to ban synthetic cannabis.
He warned then that the Government would "send the legal high industry to a place I don't want to go".
But Mr Bowden has hinted he will make a return pending the Psychoactive Substances Bill due to be introduced in August, which will force manufacturers to prove substances are "low risk" before being sold.
"I'm feeling pretty happy that New Zealand is taking a sensible approach," Mr Bowden said. "It's going to be a very different industry next year."