Doctors may try to stop or delay preterm labor by administering a medication called terbutaline (Brethine). Terbutaline is in a class of drugs called betamimetics. They help prevent and slow contractions of the uterus. It may help delay birth for several hours or days.

Can you go into labor while on progesterone?

New research found that unbalanced progesterone signals may cause some pregnant women to experience preterm labor or prolonged labor.

Can nifedipine be used to stop contractions?

Calcium channel blockers (CCBs), commonly used to reduce blood pressure, can also be used to relax uterine contractions and postpone a preterm birth. A common CCB for this purpose is nifedipine (Procardia).