A Northmead man will face court today after police seized about 50,000 tablets they allege to be the psychedelic drug Nexus.
Police allege the drug haul has a potential street value of $1.2 million.
Middle Eastern Organised Crime Squad detectives said they had been investigating the large-scale supply of ecstasy and other drugs in western Sydney since June.
Those investigations led police to a home in Northmead, which they raided yesterday morning.
Police allege that inside the home they found about 50,000 tablets believed to contain the psychoactive drug 4-bromo-2,5-dimethoxyphenethylamine, also known as 2C-B or Nexus.
Officers also seized a pill press, precursor products and documents, they alleged.
A man, 31, was arrested at the home and later charged with supply of prohibited, possession of drug manufacturing apparatus, and possession of a pill press.
He was refused bail to face Parramatta Local Court today.
Investigations are continuing, police said.
Anyone with information about drug supply should call Crime Stoppers on 1800333000 or use the Crime Stoppers online reporting page.