Representatives are currently unavailable for live product discussions. Normal operating hours are:

Monday–Thursday 8:00 AM–Midnight ET
Friday 8:00 AM–6:00 PM ET
Saturday 8:00 AM–3:00 PM ET
(Hours subject to change for holidays.)

Please try again during normal business hours to connect with a Merck OnCall® representative

• Request samples and vouchers for select Merck products
• Obtain the latest product information for select Merck products
• Have access to relevant clinical articles
• Request educational materials for your patients
• Receive assistance with registration for Merck eMedical Forums
• Get answers to questions about diseases relevant to select Merck products

You can also choose one of our other customer service options.