The invention provides peptides that bind Tissue Factor Pathway Inhibitor (TFPI), including TFPI-inhibitory peptides, and compositions thereof. The peptides may be used to inhibit a TFPI, enhance thrombin formation in a clotting factor-deficient subject, increase blood clot formation in a subject, treat a blood coagulation disorder in a subject, purify TFPI, and identify a TFPI-binding compound.本發明提供結合組織因子路徑抑制劑(TFPI)之肽,包括TFPI抑制肽;及其組成物。該等肽可用於抑制TFPI、增強凝血因子不足之個體中之凝血酶形成、增加個體中之血凝塊形成、治療個體之凝血病症、純化TFPI及鑑別TFPI結合化合物。