She might have used "a bit more cocaine than average" as well as consuming roughly 12 drinks over the course of the evening, a court heard.
The woman, who cannot be legally identified, says Beale touched her backside and forced her to perform oral sex in the toilet cubicle.
Beale, 35, is standing trial in the NSW District Court on one count of sexual intercourse without consent and two of sexual touching following an incident at Bondi's Beach Road Hotel in December 2022.
The former Wallabies champion has pleaded not guilty to all charges.
Margaret Cunneen SC asked if cocaine might lead users to engage in risk-taking behaviour. (Dan Himbrechts/AAP PHOTOS)
NSW Police forensic pharmacologist and toxicologist Shuang Fu gave evidence in the trial on Tuesday as the prosecution case prepares to wrap up.
Testing of a urine sample taken roughly 24 hours after the alleged assault showed cocaine in the woman's system.
She admitted in court to having "two very small lines" earlier in the night.
Based on the cocaine still being present in the woman's system at the time of testing, Dr Fu said she likely had an above-average dose.
Beale's lawyer, Margaret Cunneen SC, asked if cocaine might lead users to engage in risk-taking behaviour as it caused "heightened sexual excitement" and a loss of inhibitions.
"You might do things you wouldn't do if you hadn't taken the drug," she suggested.
Dr Fu said it was a "broad concept" how much people might act outside of their usual behaviour when taking any substance.
She said cocaine users were likely to become "talkative and very friendly to everyone, but not something extreme".
The court also heard on Tuesday from a staff member who worked at the Beach Road Hotel and was using the bathroom during the alleged assault.
The man said he saw a girl's "sandals" under the cubicle and heard what could have been the sounds of oral sex.
He described the sound as being like "chewing something with an open mouth" and said it continued for roughly a minute while he was in the bathroom.
Beale's defence have argued he and the woman engaged in an extended period of consensual oral sex in the cubicle, while she says it was not consensual and only lasted a matter of seconds.
The man also told the court he didn't hear any sounds of protest or distress coming from the cubicle.
The trial continues.
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