| Sales | 64,168a | 60,115a | 59,283a |
| Cost of sales | -15,193a | -16,126a | -17,411a |
| Selling, general and administrative | -10,816a | -10,504a | -10,042a |
| Research and development | -17,938a | -30,531a | -13,548a |
| Restructuring costs | -309a | -599a | -337a |
| Other (income) expense, net | -24a | 466a | 1,501a |
| Costs, expenses and other | -44,232a | -58,226a | -42,839a |
| Income before taxes | 19,936a | 1,889a | 16,444a |
| Taxes on income | -2,803a | -1,512a | -1,918a |
| Net income | 17,133a | 377a | 14,526a |
| Less: Net income attributable to noncontrolling interests | 16a | 12a | 7a |
| Net income attributable to Merck & Co., Inc. | 17,117a | 365a | 14,519a |