A critic of recently introduced laws prohibiting synthetic drugs has described the move as a "wild overreaction" that would threaten jobs in Wollongong and across the state.
The legislation was introduced to NSW Parliament this week and targets substances commonly marketed as "legal highs".
In the Illawarra, the laws are likely to have their biggest impact on The Happy Herb store in Crown Street, which employs six staff.
Company founder Ray Thorpe said the legislation would have a disastrous impact on the economic viability of the business across NSW.
"If the law goes through, which in effect bans all non-pharmaceutical medicines, this would have a significant economic impact on the shop," he said.
"Happy Herbs do not sell anything that is illegal or unsafe."
The store describes its products as "herbs that improve well-being along with a range of safe alternatives to commonly abused substances".
Meantime, the NSW branch of the Australian Medical Association has welcomed the laws.
President Professor Brian Owler said he had been alarmed by the increasing numbers of people using synthetic drugs.
Member for Kiama Gareth Ward said that under the laws, anyone caught selling synthetic drugs would risk going to prison.
The NSW government first announced an interim ban on synthetic drugs in June after the death of Sydney teenager Henry Kwan.
Mr Kwan was believed to have taken a substance known as NBOMe before falling from a balcony while under the impression he could fly.
"The community is seeing the benefits of removing harmful synthetic drug products from sale and these new laws capture the whole process," Mr Ward said.
"Importantly, we will continue to warn the community about the dangers posed by these substances which can cause such catastrophic consequences."
However, Mr Thorpe said the laws were likely to prohibit more than just harmful substances.
"The Happy Herb Company believes that proposed changes to NSW law will outlaw a huge range of safe natural alternatives to pharmaceutical medicines, and create a bigger unregulated black market for illicit drugs," he said.
"The proposed legislation rewrites the definition of what is a psychoactive agent to the point where it captures virtually every substance that is taken for health purposes that does not come from a chemist."