Large amounts of unlicensed medicines have been seized by Department of Health officials during a search of a house in Glengormley.
A man was interviewed by department officers about illegally importing and subsequently supplying unlicensed erectile dysfunction medicines via the internet.
The 47-year-old was also questioned about other medicine offences.
He will now be the subject of a report to the Public Prosecution Service.
The search was carried out by the department's Medicines Regulatory Group.
Its senior enforcement office, Peter Moore, said: "It is vital that we get the message across that unlicensed medicines can be dangerous.
"These types of products being sold, usually online, have undergone no quality control and there can be no guarantee about their safety.
"You simply do not know what you are taking or the conditions these products were made in. More importantly, you do not know the effect drugs like this may have on your health."