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Terbutaline is a pregnancy category C medication and is prescribed to stop contractions. After successful intravenous tocolysis, little evidence exists that oral terbutaline is effective. [ 7 ]
The suppression of contractions is often only partial and tocolytics can only be relied on to delay birth for a matter of days. Depending on the tocolytic used, the pregnant woman or fetus may require monitoring (e.g., blood pressure monitoring when nifedipine is used as it reduces blood pressure; cardiotocography to assess fetal well-being).
Uterine hyperstimulation or hypertonic uterine dysfunction is a potential complication of labor induction.This is displayed as Uterine tachysystole- the contraction frequency numbering more than five in a 10-minute time frame or as contractions exceeding more than two minutes in duration. [1]
In addition, several of these medications are available in intravenous forms, including both salbutamol and terbutaline. It can be used in this form in severe cases of asthma, but it is more commonly used to suppress premature labor because it also relaxes uterine muscle, thereby inhibiting contractions. [12]
Uterine Tachysystole is a condition of excessively frequent uterine contractions during pregnancy. [1] It is most often seen in induced or augmented labor, though it can also occur during spontaneous labor, [2] and this may result in fetal hypoxia and acidosis.
There are multiple techniques available to stimulate uterine contractions including mechanical, pharmacological, and alternative medicine methods to initiate contractions prior to spontaneous onset of labor. [2] Postpartum hemorrhage, also known as PPH, is defined as a loss of 500 mL or greater of blood within 24 hours after giving birth.
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Ritodrine, sold under the brand name Yutopar, is a tocolytic drug used to stop premature labor. [2] [3] This drug has been removed from the US market, according to FDA Orange Book. It was available in oral tablets or as an injection and was typically used as the hydrochloride salt. The drug acts as a selective β 2-adrenergic receptor agonist. [4]