A method of clotting blood includes the step of administering a therapeutically effective amount of a composition comprising zeolite as the active ingredient to a wound from which the blood emanates. A method of arresting blood flowing from a wound includes the steps of providing a patient being inflicted with a bleeding wound and administering a therapeutically effective amount of a composition comprising zeolite as the active ingredient to the bleeding wound. A method of facilitating the formation of blood clots includes the step of contacting blood with a negatively charged surface wherein upon contacting the blood with the negatively charged surface a clotting mechanism is initiated. In any of the foregoing methods, the blood has a compromised ability to form clots. The blood may be from a person diagnosed with hemophilia or von Willebrand disease.