If you are asking if there is some chemical reaction that makes the mixture of beer and whiskey more toxic than the two drunk separately, I'm pretty sure the answer is no. That said, if you drink a beer and then drink a shot of whiskey you know pretty much how much of each you have consumed. If, however you just pour your whiskey into the beer it might be ...
Could whiskey in lager be considered a lethal cocktail?
The short answer is no.
It has not killed me yet!
There are a number of ways to drink a Lager beer with whiskey.
Traditionally, the liquor is drunk in a single gulp and is then "chased" by the beer (lager or otherwise), which is sipped.
The liquor and lager may be mixed by pouring or dropping ...
My favourite is "Waterloo Dark"; it's dark enough to pass in a cola bottle, but doesn't have any of the heaviness or burnt taste that would turn off the blonde beer drinkers.
It's also well carbonated, so doesn't have the flatness of Guinness.
It's widely available in Canada, but only a few locations outside, such as Esber Beverage Company | ...