Around £30,000 worth of heroin was recovered by police earlier this week.
The constabulary says the Class A substance was seized from a property in the South of the Island on Thursday.
Over £80,000 worth of the drug has been recovered on the Isle of Man in the past three weeks.
Officers say they will continue to clamp down on those choosing to import and deal illegal drugs.
Two more schemes backed by government fund
Island to get Bikesafe scheme for first time
Jurby Junk's Stella dies aged 90
No plans to publish UK's assisted dying letters
Burst water main disrupts Onchan supply
Government advice following spike in data breaches
Plans for four-foot flood walls at Ramsey harbour
Garage blaze in the early hours of this morning