I bought a Johnnie Walker Black Label yesterday but it doesn't taste as usual? Could it be fake? Can i tell?

Could be something you ate or drank prior to it.|||I suspect the problem is your taste buds. You may have ate something that left residue on your tongue, and it's not agreeing with the liquor. Eat some salty pretzels and try again. After washing out your mouth a time or two with the black label, everything will go back to normal.|||where did you buy it? was it a bar? was it a dive bar? if it was a dive andthe drink is too weak its watered down. if it tastes bad than its red label or a cheaper brand.