A 31-year-old quartermaster from King's Lynn died from an overdose of medication, an inquest heard.
Samuel Cooper was found dead at his home on Burkitt Street on August 7, 2017, Area coroner Yvonne Blake said.
The medical cause of death was given as an overdose and diabetes.
At the opening of the inquest on Wednesday, Ms Blake said the delayed opening was due to a delay in toxicology results.
The inquest opening was adjourned for a full hearing at 11am on June 22 at King's Lynn Magistrates' Court.
An inquest also opened into the death Ivy Garnham from Felmingham, near North Walsham.
The 93-year-old fell at her home on Aylsham Road and was taken to the Norfolk and Norwich University Hospital.
She died on 11 January. The medical cause of death was given as traumatic intracranial haemorrhage as a result of a fall.
A full inquest takes place on April 26 in Norwich.
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