Summary
(1) In a series of 25 unselected cases of persistent hypertension treated with potassium thiocyanate, 11 responded by a considerable fall and 6 by a slight fall in blood pressure. In 8 cases the blood pressure was unchanged.
Headache, vertigo, and lack of concentration were the associated symptoms most often relieved.
(2) The drug was administered safely to elderly patients and those with electrocardiographic evidence of myocardial degeneration. Two cases with cerebral arteriosclerosis benefited greatly by treatment. No patient with severe renal dysfunction was encountered in this series.
(3) Two patients were poisoned with the drug but made uneventful recoveries when its administration was suspended.