The packages came from the UK, US and Spain.
A €38,000 drug seizure has been made at Athlone Mail Centre.
Revenue officers found Herbal cannabis, ketamine, heroin, methamphetamine, MDMA and crack cocaine in parcels which had come from the UK, US and Spain.
They were declared as t-shirts, phone cases and bicycle gloves, destined for delivery to eight different counties.
Investigations into the discovery are ongoing.