Adrian Sadowski, from Lebork in Poland, was found dead on the morning of Monday 29 June in his flat at a house in Rue du Tas de Geon in Trinity.
An inquest held yesterday found that his death was caused by an overdose of diamorphine, or heroin.
An unrelated inquest, also held yesterday, found that 51-year-old Ainsley Best from Northern Ireland died in May. She had been taken to hospital after being found unconscious at her home – the inquest found that she had suffered from alcohol addiction and depression.