Tirzepatide is is a once-a-week treatment designed to assist in weight loss. As the active ingredient in Mounjaro® and Zepbound®, it is primarily used for the treatment of type 2 diabetes mellitus and weight loss. Tirzepatide belongs to a class of medications known as dual glucose-dependent insulinotropic polypeptide (GIP) and glucagon-like peptide-1 (GLP-1) receptor agonists.