You can also deactivate any code you've used by reentering it a second time. It should be okay but better safe than sorry, just in case any of the outlandish things you can activate corrupt anything. And also save your game before you try any of these. There's everything you could ever want in here but some quick notes before you go crazy: you won't earn any trophies while cheats are on.
So coming up we've got a big list of all the GTA 5 cheat codes in the game.