THIEVES broke into a Berwick pharmacy last week and stole about 20 boxes of the drug psuedoephidrene.
Police said the thieves entered the Berwick Springs Pharmacy between 5.40am and 5.55am on 30 July by smashing through the rear door.
Once inside the Clyde Road premises, the men stole around 20 boxes of the drug from behind the counter.
Police have video footage showing two intruders entering the store wearing balaclavas and head bands.
Anyone with information is urged to call the Narre Warren Police Station on 9705 3111.