The bar at Warwick Resort Fiji where the guests who became ill were served. (ABC News: Bose Vavataga)
A toxicology report into the drinks consumed at Fiji's Warwick Resort that left four Australian tourists critically ill has found no traces of methanol.
But the Fiji government, which revealed the initial results at a press conference on Tuesday night, is yet to disclose the toxicology results of the samples taken from the patients poisoned.
It means the cause of the tourists' illnesses, which is still being referred to as "alcohol poisoning", is not yet known.Â
The poisonings hospitalised seven people — four of them Australian — after they drank a pina colada cocktail at the resort's poolside bar on Saturday afternoon, with some having life-threatening seizures.
A pina colada prepared by bartenders at the Warwick Hotel. (ABC News)
The last Australian still in hospital from the incident, a 56-year-old woman from northern New South Wales, was released on Tuesday and was returning home after four days in intensive care.
The three other Australians involved were discharged earlier this week.
In a brief press conference on Tuesday evening, Fiji's Deputy Prime Minister Viliame Gavoka said the initial toxicology report from testing the drinks found "no illicit substances or methanol".
Yet, Fijian Health Secretary James Tudravu, who joined the deputy prime minister at the press conference, did not reveal a cause of the illnesses that left the seven people hospitalised, saying "toxicology was continuing".
The group taken to hospital were drinking at the five-star Warwick Resort. Â (ABC News: Bose Vavataga)
"We are having discussions with our health teams [and] investigations are continuing [for the] definitive causes, and then we will share these with the patients," Dr Tudravu said.
"There are many causes of the symptoms they presented with. It could be chemical, it could be infection.
"[But] there is no evidence of illicit drugs or methanol."
The incident over the weekend left Fiji's tourism industry shaken.
Almost one million visitors come to the small island nation every year, including almost half a million Australians.
What we know about the Fiji alcohol poisoning
Photo shows An aerial view of resort buildings with a swimming pool and palm trees on the ocean.
Speculation over the past four days has led to many believing the incident was methanol poisoning, following the tragedy in Laos that killed Melbourne teenagers Bianca Jones and Holly Bowles.
Despite the speculation and worldwide coverage of the poisoning incident, Mr Gavoka said there had been "no indication" of people cancelling their trips to Fiji.
"But we have heard people in a sense of disbelief that Fiji could be spiking drinks or Fiji could be adding some harmful stuff into the cocktails served," Mr Gavoka said.
"Fiji is a safe destination."
A 'normal' beverage
In an interview with the ABC on Wednesday before the report was released, Warwick Resort human resources manager Nitin Goundar said the hotel was unaware of the severity of the guests' illnesses until media reports started circulating.
Warwick Resort Fiji human resources manager Nitin Goundar. (ABC News)
He said the guests reported issues such as "sore throats" and "nausea" and the resort accompanied the guests to the nearby clinic.
"They said they wanted to see a doctor, so we took them to the clinic," he said.
The guests were later transferred to Lautoka Hospital.
"We did not suspect [alcohol poisoning] at the time because it's a normal menu beverage for all the guests.
"This is something very rare for us. We couldn't believe it."
