According to UESP Cheats:


However, while running the game via Dosbox that keyboard combination is used for something else.
Is there a way around this?

CTRL+F1 takes you to the key mapper, so while you're there just remap that combo to something else.

Or alternatively: start the game without DOSbox and use that cheat on your character, save your game, and then reopen the game in DOSbox.