Officers are asking the public to be cautious after a quantity of prescription medication was lost in the Earlestown.
It is thought the medication was dropped in the Earlestown area of Newton-le-Willows on Monday.
The medication consists of 4 x Buprenorphine patches.
Members of the public are reminded that taking medication that is not prescribed for them can be dangerous and can even prove fatal.
Anyone who finds this medication is asked to hand it into their nearest police station, pharmacy or contact 101.