Hi - I am travelling from the US to Ireland and hope to enjoy the beer there. However, because of an allergy, I am not supposed to drink beer made with either bottom fermentation or a secondary fermentation process. It is something about the tyramine content that builds up during that process. is Any other beer is perfectly OK. Neither process occurs with bottled or canned beer from major US domestic breweries, but is most likely to occur with homebrew. Can you tell me whether Harp, Smithwick's, McCardle's, Murphy's Irish Red, or other common beers use either process? thanks.