As the name indicates, irradiated whiskey is simply whiskey which has absorbed radiation. Its basic effects are almost identical to those of standard whiskey, except that it also provides 10 radiation of radiation when consumed, and that it does not provide any boost in damage threshold when the player has the Whiskey Rose perk.
Irradiated whiskey can be found reliably in only one location: the kitchen area of the Searchlight fire station. Three bottles appear on the shelves near the door alongside several other types of irradiated food, including irradiated potatoes and irradiated gecko meat.
A fourth bottle may be found inside a refrigerator inside Hell's Motel. This fridge is set to contain four of a random selection of irradiated foods, including irradiated whiskey. There is only a 29% chance of any specific food item appearing in that refrigerator, including irradiated whiskey.
Lonesome Road (add-on) Another one can be found at the end of The Courier's Mile.
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