A sinister Florida woman admitted to poisoning her longtime boyfriend by spiking his lemonade with antipsychotic medication — because he wouldn’t stop talking, sheriff’s officials said.

Alvis Lorraine Parrish, 54, yelled to deputies last week from the front porch of her Jacksonville home, flatly confessing to lacing her partner’s drink with Seroquel, according to an arrest report obtained by Action News Jax.

“Yeah, I did it … because he wouldn’t shut the f–k up,” Parrish said, adding that she called authorities after giving the man just enough of the drug to quiet him down but less than a lethal amount.

Parrish then vowed to kill the man as she was taken into custody, according to the arrest report.

“Do whatever you want,” Parrish said. “If you don’t take me, I will kill him.”

Seroquel is used to treat schizophrenia, bipolar disorder and depression, according to the National Alliance on Mental Illness. Deputies found the man extremely lethargic inside the residence, where he said he didn’t understand why he was so tired.

“I’m not sure why she would give me that,” Parrish’s partner of nine years told deputies. “I don’t take Seroquel.”

The man initially refused to go to a hospital, but then had trouble filling out a report for alleged domestic battery due to his lethargic condition, authorities said.

He then realized his lemonade tasted weird and investigators found a powdery substance at the bottom of the drink. Parrish, meanwhile, admitted to spiking the man’s lemonade and also detailed her actions in a notebook, according to the arrest report.

Parrish remained jailed on $50,000 bond Wednesday. She was charged with poisoning food or water with intent to kill or injure a person. She’s due back in court on Dec. 29, online records show.

It’s unclear if Parrish has hired an attorney who could speak on her behalf. A Facebook profile for an Alvis Parrish in Jacksonville indicates she’s “happily retired” and enjoys crafting.

“I am no more than a contrygirl [sic],” the profile reads.