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Report an adverse event or product quality complaint


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For Merck product and service information


Monday–Friday 8 AM–7 PM ET

Get help with requesting samples


Monday–Friday 9 AM–8 PM ET

To make a sample request, log in to Merck Connect. Please ensure your Merck Connect profile contains NPI (National Provider Identifier) as the license type and provide your NPI number before visiting the sample request page to navigate to SampleCenter. If you are a first-time user of SampleCenter, you will be prompted to register on SampleCenter.

Available samples are shipped as soon as the appropriate authorization has been received. Eligible, validated MDs, DOs, and other licensed practitioners (depending on state-level requirements) can expect to receive samples within 3–5 business days of Merck receiving the signed and dated Sample Request Form.

Get help with Merck Connect registration and login


Monday–Friday 8 AM–7 PM ET

Voice messages left after business hours will be returned by the end of the next business day.

When you register for Merck Connect, you will need to verify that you are a licensed US health care professional, which allows you to access services such as product sample requests. You may verify your license using your state license number, your American Medical Association (AMA) Medical Education number, or your American Osteopathic Association (AOA) number.