Girndt J, Kramer P, Quellhorst E, Held K, Bohle A, Scheler F
Dtsch Med Wochenschr. 1976 Aug 20;101(34):1246-51. doi: 10.1055/s-0028-1104250.
Five personal cases and many reports in the literature demonstrate the not rare development of hypertension after oral contraceptives or an increase of an existing hypertension. In addition, the drug may also cause vascular changes in the kidneys with development of benign or malignant nephrosclerosis, similar to the increased risk of thrombo-embolic complications of the venous-arterial system. It is, therefore, necessary to check the blood pressure of women on oral contraceptive and, if hypertension exists or develops, discontinue these drugs.