Cannabis and 4-Methylpentedrone along with other illegal drugs were found.
Drugs worth just under €350,000 have been seized in both the midlands and Dublin by revenue officers.
Over the course of the last week, parcels examined at premises in the midlands and Dublin have contained around 13.2 kilograms of cannabis, and over 5 kilos of 4-Methylpentedrone along with various quantities of other illegal drugs.
Revenue also discovered just under €25,000 worth of retail goods that infringed on intellectual property rights.
The illegal contraband was found in parcels from the UK, Netherlands, the USA, Canada, and Thailand.
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