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The Merck Access Program (MAP) may be able to help answer questions about access and support, including:

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    Benefits investigations and the prior authorization and appeals processes

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    Insurance coverage for patients

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    Co-pay assistance for eligible patients

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    Referral to the Merck Patient Assistance Program for eligibility determination

    (Provided through the Merck Patient Assistance Program, Inc.)

  • To Learn More, Choose a Product Below

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    Please read the accompanying Medication Guide for WELIREG, including an important warning about harm to an unborn baby, and discuss it with your doctor. The physician Prescribing Information also is available.

    Instructions for Enrolling into MAP
    Watch this video to learn more about enrolling in The Merck Access Program or choose a product above to Enroll Now.

    This site is intended only for residents of the United States.

    Copyright © 2025 Merck & Co., Inc., Rahway, NJ, USA and its affiliates. All rights reserved. US-NON-19795 10/25

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