Angiotensin I-converting enzyme and angiotensin II levels in women receiving an oral contraceptive.

In 11 healthy, normotensive young women taking contraceptive medication (Enovid) for at least one year, plasma levels of angiotensin II were significantly higher than in healthy male and female controls. No significant difference was seen in the serum activity of angiotensin I-converting enzyme measured in vitro. Although serum angiotensin I converting enzyme activity is stimulated in several conditions in which other components of renin-angiotensin-aldosterone system are increased, this is not the case during administration of estrogens.