|The following is based on developer test content cut from Fallout: New Vegas and has not been confirmed by canon sources.|
Testfx is a consumable item that was cut from Fallout: New Vegas.
Inflicts one "hiss" of cazador poison on the Courier. Other than that, there is a 10% chance of addiction with an added Usage Monitor Effect of 30% for 30 hours.
The testfx can only be obtained via console commands.
Testfx appears in the game files of Fallout: New Vegas but should not be considered canon because it is a test consumable.