Active pharmaceutical ingredients, or APIs, are responsible for the therapeutic effects of medicines. We are one of the world’s largest producers of APIs, providing them to customers in more than 100 countries. We are the leading producer of API used in generic antiretrovirals, which treat HIV/AIDS. We also produce API for products in these areas: Antibacterial Central nervous system agents Antihistamines/antiasthmatics Cardiovascular Antivirals Antidiabetics Antifungals Proton pump inhibitors As with any Viatris product or effort, quality begins at step one. We use an established testing and verification process to help ensure the suitability of active ingredients used in our medicines