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Preterm Labor - Medications
SYMPTOMS & TREATMENTS
If your contractions are causing changes in your cervix (preterm labor), or you have signs of infection or preterm premature rupture of membranes (pPROM), you may be treated with one or more medicines, including:
- Antibiotics, to prevent or treat infection. Antibiotic treatment does not always get rid of infection. But it often prevents infection when the amniotic sac has ruptured (pPROM) and can also delay delivery after pPROM.1
- Medicines (antenatal corticosteroids) to speed up fetal lung development if birth is anticipated between the 24th and 34th weeks of pregnancy.
- Tocolytic medicines, to slow down contractions and try to delay labor for a day or two.
Delaying labor even for a short time can allow you to be:
- Transported to a medical center that has a neonatal intensive care unit (NICU).
- Given antenatal corticosteroids, which take a minimum of 48 hours to fully benefit a fetus's lungs. Even 24 hours provides some benefit.
Medication Choices
Antibiotic medicine is chosen by your doctor or nurse-midwife based on the type of infection present.
Antenatal corticosteroids (betamethasone or dexamethasone) help prepare the fetus's lungs for preterm birth.
Tocolytic medicines that are used to stop preterm labor include:
- Terbutaline.
- Indomethacin.
- Nifedipine.
- Magnesium sulfate. In the United States, this medicine is used less commonly than in the past.
What To Think About
If you have had a spontaneous preterm birth in the past, you are probably at high risk for another preterm labor. This might make you a possible candidate for weekly progesterone for preventing preterm labor and delivery. No fetal or newborn harm has been observed, though long-term research has not been done to rule out long-term side effects.8
A single course of antenatal corticosteroid treatment, used to prepare the fetus's lungs for birth, is considered to be the least risky, most effective treatment available for avoiding the most common preterm fetal complications at birth. It is standard procedure to give corticosteroid injections to most women before preterm birth, especially for pregnancies at 24 to 34 weeks of gestation.
Before using tocolytics, your doctor will consider your and your fetus's health, how far your labor has progressed, whether your membranes have ruptured, and whether you have an infection. Certain tocolytic medicines can be dangerous when a fetus is showing signs of distress or for women with certain health conditions (such as heart problems, severe preeclampsia, or poorly controlled diabetes or high blood pressure).
| By: | Healthwise Staff | Last Revised: January 10, 2011 |
| Medical Review: | Sarah Marshall, MD - Family Medicine William Gilbert, MD - Maternal and Fetal Medicine | |
© 1995-2011 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated. This information does not replace the advice of a doctor. Healthwise, Incorporated disclaims any warranty or liability for your use of this information. Your use of this information means that you agree to the Terms of Use. How this information was developed to help you make better health decisions.
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