To report an adverse experience and/or product quality complaint with a specific Merck human health product, please call the Merck National Service Center at 1-800-444-2080.

The Merck National Service Center is pleased to assist you Monday through Friday from 8 _AM to 7 _PM ET. In addition, adverse experience and/or product-related emergencies can be reported at any time to 1-800-444-2080.