Consent for Enrollment in the Program: If you have enrolled in the Merck Prescription Discount program and provided authorization for the following: (1) Patient Application and Agreement to Participate in the Program as well as the (2) Patient Consent to Use and Disclose Information for Purposes of Providing Discounts Under the Program and want to revoke your authorization, please send a letter explaining your request to: Merck Privacy Office, WS3B-85, One Merck Drive, Whitehouse Station, NJ 08889-0100. Please provide your Name and Address in your communication. Once you revoke your Consent you will no longer be enrolled in the Merck Prescription Discount Program. To revoke or receive a copy of your Patient Authorization for Marketing(OPTIONAL Consent):  If you have enrolled in the Merck Prescription Discount Program and signed an authorization for Merck to use your personal information  for purposes of contacting you to provide information about new Merck products or services, additional products and other topics, and would like to revoke such authorization or receive a copy of it, please send a written request to the following address:  Merck Privacy Office, WS3B-85, One Merck Drive, Whitehouse Station, NJ 08889-0100.  The Patient Authorization for Marketing was an optional consent and was NOT a condition for your participation in the Merck Prescription Discount Program.  If you choose to revoke your Authorization for Marketing, that will not end your participation in the Program.