For US Healthcare Professionals
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Customer Service > My Product Questions & Answers
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Product-related Questions and Services by Phone
The Merck National Service Center is currently closed. Normal operating hours are:
Monday–Friday from 8:00 AM–7:00 PM ET
(Hours subject to change for holidays.)
Please try again during normal business hours to speak with a Merck healthcare professional about Merck products or services.
You can also choose one of our other customer service options.
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All product names listed on this site are registered trademarks owned by or licensed to a subsidiary of Merck & Co., Inc.
MerckProductServices, MerckServices, MerckSource, Merck OnCall, MerckMedicus, and MerckEngage are trademarks or registered trademarks of Merck Sharp & Dohme Corp., a subsidiary of Merck & Co., Inc.
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