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We are one company, but we operate under two different corporate brand names. We are known as Merck & Co., Inc., Rahway, NJ, USA in the United States, Canada & Puerto Rico. We are known as MSD everywhere else.

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You are now leaving this website. By continuing, you will be directed to a site intended only for residents of the United States and Canada. We are called MSD everywhere, except in the United States and Canada where we are known as Merck & Co Inc, Rahway, NJ USA.

Yes

You are now leaving this website. By continuing, you will be directed to a site intended only for residents of the United States and Canada. We are called MSD everywhere, except in the United States and Canada where we are known as Merck & Co., Inc., Rahway, NJ, USA.

Yes