This page lists the consumable items in GTFO.
Consumables are general-purpose items or resources that aid players in surviving on their expeditions. These can be found throughout The Complex. The player can carry a resource pack and a consumable simultaneously as they occupy separate slots.
Consumables and resource packs CANNOT be stacked. You can use a consumable in front of sleepers since it doesn't make a sound.
Resource packs are found throughout The Complex in resource lockers and boxes. With the use of a Terminal they can be queried and pinged, making it easier to find them, especially if the player is looking for a specific one.
Consumables take up the Character's sixth item slot. They cannot be replenished through resource packs. They can be found in resource lockers/boxes, and rarely also outside of them - for example on shelves.
Some consumables have a duration of how long they will work.
Consumables cannot be pinged, queried, nor will appear on any list when using Terminals.