WA Police are powerless to stop new forms of synthetic cannabis being openly sold at Perth shops.
Despite State Government moves last year to ban synthetic drugs known as cannabinoids, products such as Northern Lights, Spice and Redback are being sold as "legal weed" and "herbal smoking blends" at Perth shops for up to $100 for 3g.
The products arrived in time to beat new Federal legislation, introduced by the Therapeutic Goods Administration this month, outlawing the manufacture, possession, sale or use of all forms of synthetic cannabinoids from May 1.
Retailers say the products - which often come with a disclaimer saying "not fit for human consumption" - have been flying out the doors with some customers buying more than $1000 worth in one go.
According to manufacturers, the cannabinoid products have been specially made to comply with State regulations introduced last June.
These outlawed Kronic and 22 other forms of the synthetic drug.
Chemists can create different versions of synthetic cannabis to work around the legislation.
A 20-year-old was reportedly taken to Peel Health Campus in a catatonic state on February 17 after smoking Devil's Breath, another form of the synthetic drug.
Kronic Black Label, which is banned in WA, was blamed for the suspected heart attack death of 38-year-old Hillman man Brendan Tominey last August.
Australian Medical Association WA president Dave Mountain said the synthetic drugs were often made by "backyard chemists" and had severe side-effects.
Although he welcomed the ban, he said the AMA had been calling for a nationwide response since the Kronic issue was made public.
State Minister for Mental Health Helen Morton said it was a concern that people were choosing to take a gamble on their health with unknown substances.
"It's extremely duplicitous for people selling these products to say they are not for human consumption, and yet market and promote them as being 'legal' drugs for intoxication," she said.