WA Police have made two massive drug busts, including a record haul of almost 140kg of synthetic cannabis called "Bombay Blue", allegedly from Scotland, that could fetch up to $2 million on Perth streets.
A separate gang crime squad raid found what is believed to be a multimillion-dollar haul in a Malaga industrial unit linked to a Comanchero bikie gang associate.
The drugs were being analysed last night but are believed to include up to 15kg of amphetamine, heroin and cocaine.
The Bombay Blue was from three consignments and was found in two raids. It was packaged in professionally manufactured sachets marketed as "an exotic blend of Eastern surprise".
Customs and Border Protection staff alerted illicit drug manufacture investigators about a 25kg consignment of Bombay Blue that arrived in Perth on February 22.
It was switched with an inert substance that allegedly led detectives to Craigie and Joondalup where another 13.5kg was allegedly found on March 1. Police say another two consignments with about 100kg arrived within a week of the bust.
The sachets varied from 2g to 5g and had flavours such as vanilla, bubblegum and pineapple. Sachets sell for up to $70, taking the potential value to almost $2 million.
The bust led detectives to raid three smoking paraphernalia stores that previously sold similar products but no more Bombay Blue was found.
Synthetic drugs are one of the biggest challenges facing law enforcement as makers alter chemical compounds to foil existing laws.
Police allege Bombay Blue has the compound XLR-11, which activates the same part of the brain as the key compound in cannabis - delta9-tetrahydrocannabinol, or THC. XLR-11 is illegal in WA under the Poisons Act.
"WA Police will continue to target the supply of synthetic cannabis," Det-Sen. Sgt Steve Bertoli said. "We consider it no different to people who deal in other illicit drugs such as cannabis, heroin and amphetamine-based stimulants."
Australian Medical Association WA president Richard Choong said the Bombay Blue seizure was good news because the drug was linked to increased risks of psychosis and mental health issues.
A recent online survey of 361 synthetic cannabis users involving the National Drug Research Institute found most reported "harm" but few sought help for the side effects.
More than two-thirds reported at least one side effect including lost co-ordination (39 per cent), fast or irregular heartbeat (33 per cent), dissociation (22 per cent), paranoia (18 per cent) and psychosis (4 per cent). Only four people sought help.
Half of the respondents said they tried the drug out of curiosity.