Ria Arianne Lindsay, 29, died at home in Maynard Road, Leytonstone, on January 7.
A coroner formally opened an inquest into her death on Monday morning (March 31).
“The death was reported to this court by the Metropolitan Police Service on January 27 as there was no clear cause of death,” said senior coroner Graeme Irvine.
He authorised a post-mortem investigation, which included toxicology tests.
The findings were not detailed in the short hearing at East London Coroner’s Court, Walthamstow – but they led a pathologist to give Miss Lindsay’s cause of death as “mixed drug toxicity”.
“Given those circumstances, I will open an inquest,” said Mr Irvine.
Inquests are held in the public interest, to investigate unnatural or unexplained deaths and whether future similar deaths might be avoidable.
He declared Miss Lindsay’s family “interested persons” – a legal status entitling them to view all the evidence ahead of the inquest and question any witnesses called to testify.
The coroner asked the family to provide a statement about Miss Lindsay’s life, including “any details they can provide in relation to her physical and mental health”.
He added: “If the family do have concerns about Miss Lindsay’s death, I need to know about them.”
The coroner ordered disclosure of other potentially important evidence, including an electronic summary of Miss Lindsay’s recent GP records.
He also ordered copies of the London Ambulance Service’s records from the incident, police records – including a statement from the senior officer who declared the incident non-suspicious – and, if Miss Lindsay was under the care of any mental health service, its records.
“It seems to be implied that there may have been some mental health support,” said Mr Irvine. “If there was such treatment, I will need to know about it.”
The final inquest was provisionally listed for September 8.