Atroquinine is a fictional synthetic substance featured in Apollo Justice: Ace Attorney. It is extremely poisonous to humans.
Atroquinine is a very potent poison (lethal at 2 µg) that paralyzes the nervous system. It takes at least 15 minutes after ingestion for adverse effects to show. Symptoms include trembling of the limbs, arching of the back and burning of the throat.
- Main article: Turnabout Succession
When Kristoph Gavin visited the house of Drew Misham to request a forgery, he left a commemorative stamp of Troupe Gramarye and a bottle of nail polish, both of which he had contaminated with atroquinine, to prevent Misham from talking about him. He told Drew's daughter Vera Misham that the nail polish was a magic charm that would protect her from danger, and he instructed Drew by letter to send a reply confirming receipt of his payment for the forgery. However, Vera grew fond of the stamp and left it in a frame. Seven years later, Drew sent a letter to Gavin, telling him to remove the "magic charm" that Vera would talk about but not identify; lacking a stamp, he used the poisoned stamp, which killed him. During the subsequent trial, Vera was called to the stand. She became nervous and bit her nails, which had the poisoned nail polish on them, and fell into a coma.
To date, Vera Misham is the only person known to have survived a near-lethal dosage of atroquinine poisoning.
The Gavinners' 2025 platinum hit song "Atroquinine, My Love" mentions atroquinine in the title.
- Atroquinine's name may be based on the real chemical quinine, which is used to treat malaria. The prefix "atro-" is based on a Latin word meaning "dark", so "atroquinine" literally means "dark quinine".
- Alternatively, the name may be a portmanteau of "atropine" - a potentially deadly tropane alkaloid extracted from, amongst others, deadly nightshade and used as a drug with a wide variety of effects - and "quinine". Since atropine can be potentially deadly, it is named after Atropos, one of the three Fates in Greek mythology who would choose how a person was to die.