Used to treat acute attacks of hereditary angioedema (HAE) in adults. HAE is a rare genetic disorder causing sudden swelling in various parts of the body, including limbs, face, and airways. Icatibant acetate works by blocking bradykinin B2 receptors, which are involved in the development of swelling and inflammation during an attack. It helps reduce symptoms such as pain, swelling, and discomfort quickly when administered by subcutaneous injection. The drug is particularly valuable for on-demand treatment, allowing patients to self-administer at the onset of an attack, improving response time and quality of life.