Contact Us

  • For general questions about our products

    Monday - Thursday 8 AM - 8 PM ET
    Friday 8 AM - 6 PM ET
    Hours are subject to change.

  • For adverse event reporting

    If you wish to report an adverse event for a specific Merck product, please call the Merck National Service Center at any time.

  • For general questions about Merck Connect

    Monday - Friday 8 AM - 7 PM ET
    Voice messages left after business hours will be returned by the end of the next business day.

NOND-1153626-0022 07/15

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