Four people have been arrested as more than £655,000 worth of drugs were seized by police.
It follows searches across South Belfast and the city centre between Monday and Friday.
Heroin and herbal cannabis were seized, police said.
Inspector James Murphy said: "We remain fully committed to tackling the scourge of drugs in our communities and we will continue to proactively investigate and carry out searches linked to the drugs trade.
"The sale, supply and consumption of these incredibly harmful drugs is doing nothing but ruining lives and lining the pockets of organised criminals.
"We are determined to disrupt their activity and anyone involved in the drugs trade, or anyone tempted to become involved should be under no illusion - we will seek to identify them, arrest them and place them before the courts.
" I would repeat our appeal to anyone who can help us identify suspects or lines of enquiry to call the non-emergency number 101. Alternatively, information can also be given anonymously to the Crimestoppers charity on 0800 555 111."
"If you or someone you know might have a problem with drug and/or alcohol misuse, please visit www.drugsandalcoholni.info where you can find information about services and help in your local area."
