Nifedipine or Procardia is a calcium channel blocker customarily used to treat angina or extreme blood stress. despite if, in being pregnant it relatively is particularly customarily used to treat preterm hard work because it may probable sluggish or stop uterine contractions. it relatively is been Preterm labor is defined as regular uterine contractions causing cervical dilation. Several classes of medications are used for tocolysis, including beta-adrenergic agents, calcium channel. Nifedipine, sold under the brand name Adalat among others, is a medication used to manage angina, high blood pressure, Raynaud's phenomenon, and premature labor. It is one of the treatments of choice for Prinzmetal angina. [1] Why It Is Used. Nifedipine is used to treat preterm labor when: Regular contractions of the uterus have thinned (effaced) the cervix and opened (dilated) it less than 4 cm, and the mother's amniotic sac has not broken. Nifedipine and other tocolytic drugs might stop preterm labor for two to seven days, providing time to use corticosteroids to help reduce complications in the fetus associated with preterm. My dr is taking me off at 36 weeks as well and If I still have contractoins and am in pain and don't deliver by 38 weeks she is going to induce me. Preterm labor can be scary. When a baby is born before she’s had time to fully develop, it can have long- and short-term effects on her health. CONCLUSION. Nifedipine appears to be superior to β 2-adrenergic-receptor agonists and magnesium sulfate and should be considered as the first-line tocolytic agent for the management of preterm labor. Nifedipine Pregnancy Warnings Animal studies have revealed evidence of embryotoxicity, placentotocity, fetotoxicity, and teratogenicity. There are no controlled data in human pregnancy. A typical pregnancy lasts about 40 weeks. When a woman goes into labor at 37 weeks or earlier, it’s called preterm labor and the baby is said to be premature.