A method for lowering systolic blood pressure in a patient exhibiting resistance to a antihypertensive therapy with one or more drugs, the method comprising administering to the patient ANAVEX®2-73 at a dose and frequency effective to provide a reduction of at least about 3 mmHg in one or more blood pressure parameters selected from trough sitting systolic, 24-hour ambulatory systolic, and maximum diurnal systolic blood pressures.