Hypertension in women in late pregnancy is usually prone to serious complications such as eclampsia, cardiovascular and cerebrovascular accidents, and placental abruption. If the systolic blood pressure is greater than 160 mm Hg or the diastolic blood pressure is greater than 110 mm Hg, symptomatic antihypertensive treatment is necessary. Oral labetalol, or nifedipine extended-release tablets can usually be considered to lower blood pressure. Because these drugs do not affect the growth of the fetus and also promote the maturation of the fetal lungs, magnesium sulfate is also needed to prevent the onset of eclampsia if necessary.