Fan Works / Tampering With Food And Drink

If Wishes Were Ponies: Similar to what Harry did in his own canon, Twilight is able to get Rita Skeeter to confess to being an unregistered animagus by tricking her into thinking that the tea she just drank is laced with a truth serum.
The J-WITCH Series has a benevolent variant in Season 1. While the heroes search for Meridian's missing heir, Uncle concocts for her a chi spell which will hurt evil magical entities that touch her. Once Elyon is confirmed to be the heir, the heroes trick her to drink the concoction by slipping it into a bottle of grape soda, her favorite drink. Unfortunately, Daolon Wong concocts a counter-spell in the next chapter, and Cedric uses the exact same trick as the heroes to make Elyon drink it.

The Blood of the Covenant: During the Siege of the North, Ozai puts his plan to become Fire Lord into action. He poisons his father Azulon (who lived much longer than in canon) and ordered his agents on Iroh and Lu Ten's ship to kill the other two princes (as Iroh was next in line for the throne, and Lu Ten was his heir). The agents attempt to kill them via poisoning their tea. Fortunately, Lu Ten (using his father's tactic of inhaling a tea's scent before drinking it) smells the poison and doesn't drink. He's able to warn Iroh in time, and the two fight their way off the ship.

In both canon, and in the works of A.A. Pessimal, the Guild of Assassins' School now has its Domestic Science department. As with any school teaching young ladies the rudiments of cooking and domestic management, a lot of what it does is unremarkable and straightforward and to be found in any girls' school anywhere. Until the girls enter the Fifth Year and go On The Black, that is. Then they learn other food-and-beverage-related skills.

In Destiny's Kiss, Princess Ting-Ting is killed when her tea is poisoned.
In the eleventh chapter of Free, Queen Elsa's chocolate is poisoned with a herb called frost-bane. Frost-bane is so hot that no frost can form on it, which makes it perfect to use against An Ice Person like Elsa. Elsa faints and breaks out in a fever. After being comatose for several days, Kristoff comes back with Isfrukt berries to cure Elsa's ailment.

In Gold Poisons, a poison which attacks the golden core is poured into Lan Xichen's tea at a discussion conference. It comes very close to killing him.

This happens quite a lot in The Rigel Black Chronicles:
- Harry's drink is invisibly turned into a powerful acid, but she's saved Just in Time by someone who heard about the plot. Her arm is splashed and burned, but that's easily fixed.
- She later stops Tiberius Ogden from taking a drink spiked with Nimue's Breath, which is an anti-inhibitor, harmless in itself, but sometimes used to conceal the presence of more dangerous additives. Sure enough, the drink turns out to contain nightshade.
- Before Leo defends his crown in the final match of the Lower Alleys duelling tournament, someone spikes his fake rum to make him actually intoxicated. Harry is only able to partially counteract it before he has to fight.
- Harry gives the Weasley Twins a bag of Bertie Bott's Every Flavour Beans coated with a potion that causes them to pour floods of pink goo from every pore.

We Must Be Killers:
- As a show of dominance President Snow enjoys serving Ronan poisoned cookies and biscuits that Ronan has to vomit up afterward on most of the occasions he invites him over for a game of chess or a political chat.
- Callista tampers with the food of people who get plastic surgery to resemble her dead tributes to make them temporarily impotent or nauseous.

In Blind Courage, a Forced Miscarriage was attempted on 17-year-old Princess Zelda when she refused to abort a baby born out of wedlock. Poison was snuck into her food. Zelda fell into a coma but ultimately she and her daughter survived the poisoning.

In Chapter 5 of And The Adventure Continues, Jethro and Monty are captured and searched. A guard finds Monty's tube of conditioning pills used to adapt her body to her cybernetics. Monty tells them that the pills "make her happy'' so the guards pass them around on the assumption that it's Ecstasy. Fifteen minutes later they're writhing on the floor in their own vomit.

At one point in If They Haven't Learned Your Name, Barnes winds up breaking into Sam's hotel room and presenting him with a container of macaroni and cheese with bacon. Sam's been craving macaroni and cheese for weeks, so he nearly snaps up the container before remembering that Barnes's allegiances are still unconfirmed, and asks Barnes if he put anything funny in the food. Barnes looks baffled and genuinely offended, and calmly asks Sam why he'd poison him when he has a perfectly good sniper rifle. Poison's tricky because the associated biochemistry isn't a sure thing, while a bullet to the head almost never goes wrong. Sam winds up eating the food.
Sam: Ah. Silly me. Why hand-deliver someone dinner when you can make their head explode from a mile away.

The Cosmos: Lila convinces Alya to slip something into Alix's food to trigger an allergic reaction
In Marinette Dupain-Cheng's Spite Playlist: Remix, Lila gives another model food poisoning so that she can replace them at one of Adrien's photoshoots. She then gloats to him about how much better she is at manipulating others. Adrien responds by pretending that he's feeling sick himself, suggesting that he might be coming down with food poisoning himself. The photographer then cancels the shoot entirely, much to Lila's ire.

Mastermind: Strategist for Hire has Giran meet their end via a poisoned cup of coffee.

In the Empath: The Luckiest Smurf story "Smurfnip Madness", Gargamel sprays smurfberries with concentrated smurfnip essence so that the Smurfs will eat the berries and get high to the point where they start seeing hallucinations.

Snow Blind: Invoked. After he's injured in a fight and the Nightwatcher kidnaps him to give him medical treatment, Don worries that the vigilante may try to drug him, leading to him requesting chicken soup when offered food (as chicken soup has a light taste, which would allow him to better tell if there was a pill in it). Because the Nightwatcher is actually Raphael, the food wasn't drugged, as he doesn't want to do something so underhanded to his little brother (he considered it for a moment so that Donnie would sleep, but immediately decided against it).

Tampering With Food And Drink / Fan Works