An inquest has been told a mother-of-two died at her home because of drink and drug abuse.
Police initially treated the death of Eira Wyn Roberts as suspicious after she was found unconscious at a house in Penygroes last December. A man was arrested on suspicion of assault but later released without charge.
But a post-mortem ordered by North West Wales coroner Dewi Pritchard Jones found Ms Roberts was twice the amount of alcohol over the drink drive limit and traces of cannabis and cocaine.
The inquest at Caernarfon heard Ms Roberts had also taken pregabalin – a type of medicine to treat anxiety – at well above therapeutic levels. She was pronounced dead by paramedics on the way to Ysbyty Gwynedd in Bangor.
Mr Pritchard Jones said it had quickly become apparent that the death was drug-related after a criminal investigation began.
Bruises and swelling found on Ms Roberts’ hand had suggested she may have died following violence – but following the post-mortem, police were no longer treating the death as suspicious.