Methods and compounds for reversing pathological vasodilation of blood vessels, for example vasodilation caused by activation of CB1-like receptors, by administering to a subject a therapeutically effective amount of a compound sufficient to induce vasoconstriction, the compound comprising: ##STR00001## wherein dashed lines independently represent either a single or a double bond, R.sub.1 is a lower alkyl, R.sub.2 is a lower alkyl, R.sub.3 is a lower alkyl or halogen, R.sub.4 is a lower alkyl or hydrogen, R.sub.5 is a lower alkyl or hydrogen, R.sub.6 is a hydrogen, lower alkyl or halogen, and R.sub.7 is a hydrogen, lower alkyl or halogen. The vasoconstrictor can be used for a variety of purposes, including hemostasis or the treatment of shock, for example vasodilatory shock syndromes such as septic shock.