The present invention relates to a method for the prevention and treatment of hypotension and shock due to low peripheral resistance, comprising administering to a mammal in need thereof an effective amount of a certain imidazole derivative or pharmaceutically acceptable ester or salt thereof. In addition, the present invention relates to a method for the treatment of cardiopulmonary resuscitation, comprising administering to a mammal in need thereof an effective amount of a certain imidazole derivative or pharmaceutically acceptable ester or salt thereof.