California dermatologist Yue Yu pleaded not guilty Thursday to spiking her husband's tea with Drano.

She was arraigned on three felony counts of poisoning and one felony count of domestic battery with corporal injury, her attorney Scott Simmons told Fox News Digital.

Orange County prosecutors say the mother of two spiked her radiologist husband Jack Chen's lemonade and tea with Drano during a nasty divorce and custody battle over their two young children.

CALIFORNIA DOCTOR WHO SAYS WIFE SPIKED TEA WITH DRANO SUFFERS FROM ACID REFLUX, NOT POISONING: LAWYER

Emily Yu inset over home security video

In a series of screengrabs from home surveillance video, Dr. Jack Chen sips from a drink he alleges estranged wife Yue Yu, inset, poisoned with Drano. (Orange County Superior Court, Irvine Police Department)

Chen noticed his drink tasted strange in April 2022 and began feeling ill.

He set up three hidden cameras in the family's kitchen that allegedly captured Yu on July 11, 18 and 25 grabbing a bottle of Drano from under the sink and dumping it in his beverages.

But Yu's lawyer says it was a setup.

Yue Yu exits the courtroom in the Superior Court of California of the County of Orange Tuesday

Yue Yu exits the courtroom in California Superior Court in County of Orange April 18, 2023. (Fredrick M. Brown/Daily Mail/Pool)

"They had a big ant problem in the kitchen. Jack Chen tells her to put the Drano into this lemonade or tea in order to bait and kill the ants," Simmons previously told Fox News Digital. 

CALIFORNIA DERMATOLOGIST ACCUSED OF POISONING HUSBAND'S TEA INDICTED

"He then sets up what he calls spy cameras to capture her pouring the Drano into the cup, then falsely accuses her of trying to poison him," he added.

Chen first made the poisoning accusations in August in a request for a restraining order against his wife in family court

California dermatologist Yue Yu in court April 18. She's accused of poisoning her radiologist husband's tea with Drano in secretly recorded footage (right).

California dermatologist Yue Yu in court April 18. She's accused of poisoning her radiologist husband's tea with Drano in secretly recorded footage (right). (Fredrick M. Brown/Daily Mail/Pool)

He filed for divorce and sole custody of their children the same day. 

She was arrested last year and released on $30,000 bond.  

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If convicted, Yu faces up to eight years in prison.