A Perth dentist who spiked the drinks of multiple women he met online and then raped them has been found guilty of 24 charges.

Farzem Mehrabi, 34, met women aged between 18 and 24 on Tinder and Bumble and took them to bars in the Western Australian capital over a two-month period in 2022.

Surveillance footage played for the court during the month-long jury trial shows Mehrabi adding a substance to his companion’s glass while she was in the bathroom during one meeting.

Prosecutors say the then-third-year medical student at the University of Notre Dame spiked his drinks with a drug cocktail that included MDMA, MDA, lorazepam and methamphetamine.

Iranian-born Mehrabi, who moved to Australia as a child, also spoke about his drug use and boasted to some women that he buys high-quality chemicals from Switzerland.

He then took the intoxicated women to his parents’ home in Shelly, south Perth, where he had sex with them without their consent, 7 News reports.

Mehrabi testified that the drug use and sex were consensual, but jurors found him to be an unreliable witness who had a habit of lying about things including his age, height and whether he lived with his parents on dating apps.

One woman told the court that the next day, after having just four drinks, she woke up in Mehrabi’s bed with no memory of the night, scratched and feeling sick. She later called him to ask if he had “given her anything.”

Surveillance footage presented to the court showed Farzem Mehrabi mixing the substance with the woman’s drink while she was in the bathroom.

The 34-year-old was found guilty of 24 charges and will be sentenced in December.

Seven women filed complaints against Mehrabi, and five of them found him guilty of sexual assault, as well as other drug-related charges and obstructing breathing by applying pressure to the neck.

He was cleared of one charge of spiking his drink.

Mehrabi was remanded in custody and will be sentenced on December 17.