Officials say that they have charged a 29-year-old man following the discovery of the drugs.
Artur Topalli, appeared at Canterbury Magistrates Court today charged with the attempted importation. He was remanded in custody.
He will next appear at Folkestone Magistrates Court on 7 March.
More top news
A number of teenagers, aged 13 to 15, from Portsmouth, have been treated in hospital, after taking tablets believed to be diazepam.
Thursday Evening's Pollen Forecast
Thursday night's weather for the east of the region