Ampoule of Ammonia is an item in Disco Elysium.
A thin glass tube wrapped in cotton netting, used to treat fainting spells. Produced by Saint-Batiste Pharmaceuticals. NOTE: This is a quest item, you don't have to equip it to use it. Just having it in your Inventory is enough.
Used to open the white check to investigate the hanging dead body if it has been failed, as well as provide a modifier to make the check easier.