Dubai Customs has seized more than 5.7 million Captagon pills at Jebel Ali Port.
The drugs were hidden in a foodstuff container arriving through the Jebel Ali and Tecom Customs Centre.
Police did not name the Arab state the container had been shipped from. But Syrian drug gangs have been implicated in the manufacture and smuggling of Captagon to the Gulf.
The container was scanned, and with the help of the customs K-9 Dog unit, dozens of parcels were seized.
The pills are estimated to have a street value of about Dh50 million.
Dubai Customs’ director-general Ahmed Mahboob Musabih said law enforcement agencies are working together to combat the smuggling of narcotics.