Tirzepatide — also marketed under the brand names Mounjaro and Zepbound — is a fairly new antidiabetic medication used for the treatment of type 2 diabetes and weight loss.. Administered weekly by subcutaneous injection, tirzepatide works by suppressing appetite and reducing total food intake. The FDA has approved tirzepatide for chronic weight management in clinically obese adults, and in overweight adults with at least one metabolic condition such as high blood pressure, type 2 diabetes, dyslipidemia or heart disease.