MERCK & CO INC revenue for the last year amounted to 64.17 B USD, the most of which — 57.40 B USD — came from its highest performing source at the moment, Pharmaceutical, the year earlier bringing 53.58 B USD. The greatest contribution to the revenue figure was made by United States — last year it brought MERCK & CO INC 32.28 B USD, and the year before that — 28.48 B USD.