Gardaí seized cannabis worth €25,000, illegal cigarettes worth €27,000, more than €42,000 in cash and sterling to the value of £8,360 in a search operation in Cavan on Tuesday.
The searches were conducted on a residence after a man failed to stop for gardaí on Tuesday in Cavan and was later arrested in connection with dangerous driving.
During the course of follow-up enquiries a house in Arva, Co Cavan, was searched under warrant on Tuesday evening.
During this search, gardaí seized €18,800 in cannabis herb, €6,400 worth of cannabis plants and a significant quantity of illegal cigarettes.
These illicit cigarettes are estimated to have resulted in a loss of €27,000 to the State. Cash in euro (€42,670) and sterling (£8,360) were also seized.
Gardaí said their investigations are ongoing.