What are cookies?

Cookies are small text files, typically randomly encoded, that are installed on the user’s device and stored on it. Cookies allow the collection of certain information, including personal data, when they enable identifying a data subject, in order to fulfill various purposes. Merck uses cookies and similar technologies in its services for a number of reasons, for example:

  • Websites load faster;
  • Websites can be navigated more quickly;
  • Your settings, such as language and time zone, can be saved;
  • Security on websites is improved as you can verify your identity; and
  • Logging into secure sites is made easier.

1. Types of cookies

Depending on the function and purpose of cookies, there are several types; however, at Merck we can categorize cookies on our websites into three groups:

  • Necessary: The site presents these cookies as necessary to allow you to navigate through our platform correctly. The use of these cookies is essential for the website to perform its basic functions and operate correctly. The cookies are set in response to your actions and depend on your specific service requests (for example, setting your privacy preferences, completing forms, or logging in).
  • Functional: These cookies enable the provision of advanced functionalities and are used for personalization, as well as for providing the services requested by the user and for remembering site preferences. These cookies are set in response to your actions and depend on your service requests (for example, pop-up notification options, username, region, or language). These cookies are only used by Merck with your prior consent.
  • Targeting: These cookies can be configured to learn about and analyze your interests and show relevant ads on other sites. These cookies work by uniquely identifying your browser and device. By implementing these cookies, our aim is to gain more information about your interests and browsing behavior, and to place our advertising specifically. These cookies are only used by Merck with your prior consent.

2. What types of cookies does this website use?

Necessary cookies

The website presents these cookies as necessary to allow you to navigate correctly through our platform. The use of these cookies is essential for the website to perform its basic functions and operate correctly. The cookies are set in response to your actions and depend on your specific service requests, as described in section 1 of this Cookie Declaration. On this site we use the following necessary cookies:

Cookie / technology Function / purpose Retention period Shared with third parties? Third party / provider
CookieConsent Stores the user consent state and the consent key so that the website can read and respect the user's cookie choices on later visits. Up to 12 months, depending on the Cookiebot configuration and browser limits. Yes, for consent logging/verification. Cookiebot CMP / Cybot, part of Usercentrics
CrossConsent Supports Cookiebot cross-domain consent sharing, where applicable, so the consent choice can apply across domains or subdomains in the same domain group. Up to 12 months, depending on the Cookiebot configuration and browser limits. Yes, for consent management. Cookiebot CMP / Cybot, part of Usercentrics
incap_ses_* Security and traffic-management cookie used to maintain the visitor session and help protect the site through Imperva/Incapsula services. Session. Yes. Imperva / Incapsula
visid_incap_* Security, reliability and performance cookie used by Imperva/Incapsula to identify returning traffic and protect the site. Approximately 12 months, subject to configuration and browser limits. Yes. Imperva / Incapsula

Functional Cookies

These cookies enable the provision of advanced functionalities and are used for personalization, providing the services requested by the user and allowing the site to remember preferences. The cookies are set in response to your actions and depend on your specific service requests, as described in section 1 of this Cookie Declaration. On this site we use the following functional cookies:

Cookie / technology Function / purpose Retention period Shared with third parties? Third party / provider
_hjSession_1931659 Keeps current Hotjar session data so subsequent requests during the same visit are attributed to the same session for user-experience analytics. 30 minutes, extended on user activity. Yes. Hotjar
_hjSessionUser_1931659 Stores a Hotjar user ID that is unique to this site, so later visits to the same site are attributed to the same pseudonymous user ID. 365 days. Yes. Hotjar
s_cc Determines whether cookies are enabled in the browser for Adobe Analytics. Session. Yes. Adobe Analytics
s_sq Used by Adobe Analytics Activity Map to store information about the previous link clicked by the visitor. Session. Yes. Adobe Analytics

Targeting cookies

These cookies allow collecting information related to your browsing habits, and may allow your identification and the eventual construction of profiles to show personalized ads according to your interests, as described in section 1 of this Cookie Declaration. On this site we use the following Targeting cookies:

Cookie / technology Function / purpose Retention period Shared with third parties? Third party / provider
_fbp Used by Meta Pixel to identify browsers for advertising measurement, optimization and remarketing. Approximately 90 days. Yes. Meta Platforms
_ga Used by Google Analytics to distinguish unique users. Up to 2 years, subject to browser limits and site configuration. Yes. Google Analytics / Google LLC
_ga_EP12CJD9NY; _ga_H3XCE384EL; _ga_L6FGK40DX4 Used by Google Analytics 4 to persist session state for the relevant measurement/container IDs. Up to 2 years by default; some instances may be session-based according to the observed configuration. Yes. Google Analytics / Google LLC
_gid Used by Google Analytics to distinguish users and sessions. 24 hours by default. Yes. Google Analytics / Google LLC
_gat_UA-9049181-55 Used by Google Universal Analytics to throttle request rate for the indicated property. Approximately 1 minute / session by default. Yes. Google Analytics / Google LLC
_gcl_au Used by Google Ads / Conversion Linker for advertising and conversion measurement. Approximately 90 days. Yes. Google Ads / Google LLC
AMCV_12D338B3527846AA0A490D4C@AdobeOrg Stores the Adobe Experience Cloud visitor ID used to identify a unique visitor across Adobe Experience Cloud solutions. Approximately 13 months. Yes. Adobe Experience Cloud
AMCVS_12D338B3527846AA0A490D4C@AdobeOrg Indicates that the current Adobe Experience Cloud session has started. Session. Yes. Adobe Experience Cloud
ev_sync_dd Used by Adobe Advertising to synchronize the Adobe Advertising visitor ID with partner ad exchanges. Approximately 1 month according to the observed cookie expiration. Yes. Adobe Advertising / everesttech.net
everest_g_v2 Stores the Adobe Advertising browser and visitor ID to map ad clicks and subsequent website events. Approximately 1 year. Yes. Adobe Advertising / everesttech.net

3. How can I disable or delete cookies used on the website?

By default, only the necessary cookies are active on Merck websites. Functional and targeting cookies will only be enabled if you choose to do so and confirm this choice. You can also change your browser settings to block all cookies. Additionally, you can configure your browser to block only certain types of cookies or to notify you as soon as a new cookie is stored on your computer.

4. Social plugins

We use social media plugins from various networks (e.g., Facebook). With the help of these plugins, you can share content or recommend products. The plugins are disabled by default and therefore do not send data to other sites.

By clicking the social network symbol on this website, you will be redirected to confirm, with a second click on “OK” on the next website, that you consent to enable the plugins and thus give your explicit consent for the processing of your personal data in this context (the so-called 2-click solution). If these plugins are enabled, your browser will establish a direct connection with the servers of the respective social network as soon as you access the site. The content of the corresponding plugin is transmitted directly from the social network to your browser and integrated into the website. By incorporating the plugins, the social network receives information that you visited the operator’s page. If you are connected to the social network, you can link the visit to your account. When you interact with the plugins, the corresponding information is transferred directly from your browser to the social network and stored there. Even if you are not connected to the social networks, sites with active social network plugins may send data to those networks. With an active plugin, a cookie with an identifier is placed each time you access the site. Because your browser sends this cookie every time it connects to a network server without being asked, the network could basically use it to create a profile of the websites visited by the user associated with the ID. And it would also be possible to reassign this identifier to a person later – for example, when you log in later to the social network. For the purposes and scope of data collection and processing and use by the social networks, as well as your rights and options for privacy protection and, in particular, your right to revoke your consent, please refer to the data protection notices of your networks.

Facebook Connect and Facebook Social Plugins

Last updated: May of 2026

Additionally, our website also uses Facebook Connect and Facebook Social Plugins (third-party social cookies), a service owned by Facebook, Inc. The function of this service is to control interaction with social widgets within the site. Facebook is a company based in the United States. Therefore, the data processed (including the user’s IP) is transferred to the United States and stored on Facebook servers located in that country. You can find more information about the use of cookies on Facebook here.

merck

This website is property of Merck S.A., company with adress in 12 Avenida, 0-33 Zona 2 Mixco-Guatemala and its content has been designed exclusively for residents of Central America, Dominican Republic and West Indies. In any case the information contained in it replace the consultation, treatment and recomendations of the health professional. 2026 © All rights reserved.

CT-NONCMCGM-00366/Mar2026​

Learn more about MERCK at www.merckgroup.com/gt-es

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