Stacie Renee Dutaillis, 36, was denied bail in Brisbane Magistrates Court on Thursday following her arrest in the city on Wednesday.
She is facing one count each of manslaughter and grievous bodily harm, and two counts each of negligent acts causing harm and supplying medicines or hazardous poisons.
The charges relate to events almost seven months ago when a 15-year-old boy was found unresponsive at a North Mackay home.
He was one of six children found at the residence and taken to hospital for treatment when emergency services arrived on September 30.
The boy died the following day.
Dutaillis appeared in court with her hand bandaged during the bail application on Thursday morning.
The child's cause of death was a brain injury after allegedly being supplied with the prescription opioid Tramadol, the court was told.
In opposing bail, the police prosecutor said Dutaillis had a history of failing to appear for court and stressed the seriousness of the alleged offending that killed one and hospitalised several others.
An Aboriginal and Torres Strait Legal Service lawyer said that at this stage the matter is expected to be contested and a trial could be 18 months to two years away.
In denying bail, magistrate Suzette Coates agreed Dutaillis posed an unacceptable risk and remanded her in custody
The matter is due to return to court in Mackay on June 6.
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