Seven local chemists have been burgled in the past two months, with thieves breaking front windows and locks to gain access.
Found in cold and flu medication, pseudoephedrine is used to manufacture methamphetamine.
Police believe a number of people are involved.
The criminal group has made hits at Kingsley Village, Kingsway City, Woodvale Boulevard and Marmion Village.
Warwick Senior Sergeant Brad Burnett said the offences were committed between midnight and 5.30am.
Recent break-ins included one at Kingsley Village on Saturday, July 5, and another at Marmion Village on July 10 when they smashed the front window with an axe.
Sen-Sgt Burnett urged the public to look out for suspicious vehicles and behaviour in commercial areas.
‘We’re interested in anything seen at commercial properties,’ he said.
‘Not just shopping centres, industrial areas like Wangara as well.’
Anyone with information can call Crime Stoppers on 1800 333 000 or the police line on 131 444.