NEW YORK ( TheStreet) -- Merck ( MRK) said it expects first-quarter non-GAAP earnings of 95 cents to 98 cents a share as it will be unfavorably impacted by the euro exchange rate by about 1% or 2%. Analysts expect earnings of $1.01 a share. Merck also re-affirmed previous guidance on Tuesday that it expects 2012 full-year non-GAAP earnings per share of between $3.75 and $3.85. Analysts, on average, expects earnings per share of $3.81. -- Written by Alexandra Zendrian >To contact the writer of this article, click here: Alexandra Zendrian >To submit a news tip, send an email to: firstname.lastname@example.org. >To follow the writer on Twitter, go to Alexandra Zendrian.