South Australian pharmacists will administer 10 more vaccines including those for chickenpox, measles, meningococcal, and shingles, in what will be the most comprehensive program in Australia.

The state government says the changes will further ease the pressure on GP services.

"We want to do what's within our power as a state government to lessen the load on our incredibly burdened GPs," Health Minister Chris Picton said.

"This is one simple measure to do just that, with pharmacists as trusted health professionals ready and willing to step in to provide these services."

Under the new scheme, which comes into effect on Friday, pharmacists will be able to administer vaccines for a range of diseases including Japanese encephalitis virus, hepatitis A and B and the human papillomavirus.

They will also continue to provide jabs for seasonal influenza and COVID-19 with coronavirus cases in SA currently between 2000 and 3000 each week.

The new code follows a review by SA Health's chief pharmacist and the Public Health Division which included consultation with key stakeholders.

It also follows a move to provide training to at least 1000 community pharmacists across the state to deliver early identification and treatment of mental health issues.

Chief Public Health Officer Nicola Spurrier said the expanded vaccine program would increase the uptake, providing greater protection to the community.

"During the busy winter months and beyond, this will help ease demand on GPs and help alleviate pressure on our health services," Professor Spurrier said.