MERCK AND CO INC revenue for the last year amounted to 54.46 B EUR, the most of which — 48.55 B EUR — came from its highest performing source at the moment, Pharmaceutical, the year earlier bringing 48.59 B EUR. The greatest contribution to the revenue figure was made by United States — last year it brought MERCK AND CO INC 25.80 B EUR, and the year before that — 25.42 B EUR.