Drug class

Plasma Kallikrein Inhibitors (Acute)

Plasma kallikrein inhibitors for acute use are a targeted therapeutic class of agents formulated to arrest the contact activation pathway during acute attacks of hereditary angioedema. Read more about Plasma Kallikrein Inhibitors (Acute)

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About Plasma Kallikrein Inhibitors (Acute).

Plasma kallikrein inhibitors for acute use are a targeted therapeutic class of agents formulated to arrest the contact activation pathway during acute attacks of hereditary angioedema.

These medications selectively bind to and inhibit active plasma kallikrein, preventing the enzymatic cleavage of high-molecular-weight kininogen and thereby halting the excessive generation of bradykinin, the principal mediator driving vascular permeability, vasodilation, and tissue edema.

Clinically, these fast-acting agents—such as ecallantide and oral formulations like sebetralstat—serve as on-demand rescue therapies to resolve acute episodes involving subcutaneous swelling, painful abdominal attacks, and potentially fatal laryngeal obstruction.