Three other people who were poisoned remain in hospital.

ACT Health confirmed the patient who is receiving medical treatment at Canberra Hospital remains in a stable condition.

One of the women poisoned after she ate the mushrooms is believed to have been discharged from hospital on Wednesday.

The condition of the two people transferred to hospital in Sydney after suffering severe liver complications has not been publicly released.

The three women and a man were all hospitalised after eating the mushrooms in the ACT.

Three of the people lived in the same house. A fourth case involved a woman who presented to Queanbeyan Hospital on Monday night. This case was not related to the poisonings from the weekend.

Authorities have repeatedly issued warnings to the public to not pick wild mushrooms.

ACT chief health officer Paul Kelly on Wednesday warned the public that as little as five grams – a teaspoon – of death cap mushrooms could kill an adult.

The mushrooms are associated with oak trees, which are common in Canberra.