Pharmacists will take on some doctors' tasks under a controversial plan to allow Victorian patients to see pharmacists for vaccines and chronic diseases such as diabetes and asthma.

Under a trial that has angered doctors, Victorian Health Minister Jill Hennessy said three pharmacies would test a partnership with GPs next year to "help patients manage their chronic illnesses and medications".

Pharmacists will take on some doctors' tasks in Victoria from next year.

People with high blood pressure, diabetes, asthma, chronic obstructive pulmonary disease and those on anti-coagulation therapies can be part of the trial which will involve two rural pharmacies and one in Melbourne.

The idea is that patients will be able to visit their local pharmacist to monitor their conditions and manage medications under the direction of a GP care plan.