Prescription medications, tramadol and diazepam will be declared monitored medicines in the ACT.

The recommendations were made following an inquest into the preventable death of Canberra woman Lauren Johnstone who died in 2015.

ACT Chief Coroner Lorraine Walker determined that Ms Johnstone died from an accidental overdose.

It was found her death was a result of taking her prescribed medication as instructed, and aggravated by over-the-counter medication her doctors were not aware of.

Ms Johnstone's family have welcomed the changes which they say will save lives.

Speaking on behalf of the family, Ms Johnstone's daughter Ariarne Bunyan said she was pleased the ACT government was supportive of the coroner's recommendations.

"The tragedy of my Mum's death was preventable," she said.

"To see that schedule 4 medicines such as Tramadol and Diazepam will now be added to the scope of monitored medicines, as well as implementing a national drug monitoring system by 2021 is a really great outcome.

"My Mum's death will now save the lives of others and that's all I could really ask for."

The changes will apply to the ACT's online prescription monitoring system DORA.

The Chief Coroner also suggested added functionality to the system to highlight where patient has demonstrated drug-seeking behaviour. This was supported by the ACT government.

The government tabled its response to the inquest on Tuesday but not all of the Chief Coroner's recommendations were supported.

Ms Walker suggested widening the scope of monitored medicines to include all schedule 3 (pharmacist only) and 4 (prescription only) drugs.

The coroner specifically recommended over-the-counter sleeping pill doxylamine should also be added to the monitored list.

READ MORE: Accidental overdose leads to calls for changes to ACT's prescription monitoring system

The government response, presented by Health Minister Rachel Stephen-Smith, said to apply this to schedule 3 medications would be a "considerable regulatory burden".

"The ACT government considers that the health harms and scheduling status of schedule 3 medicines are better considered by the Therapeutic Goods Administration," the response said.

The alternative suggestion by the Chief Coroner was instead supported.

This recommended that certain prescription and over-the-counter medications that may have significant sedating effects when taken in combination with opioids or benzodiazepines be added to the monitoring system.

"The ACT government supports this recommendation and will undertake a consultation process in 2020 to determine which Schedule 4 medicines should be declared monitored medicines," the response said.

The changes will be mandated when the ACT adopts a national real-time prescription monitoring system. This is due by June 2021.