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There is no clear first-line tocolytic agent. [6] [7] Current evidence suggests that first line treatment with β 2 agonists, calcium channel blockers, or NSAIDs to prolong pregnancy for up to 48 hours is the best course of action to allow time for glucocorticoid administration.
As an asthma treatment, the inhaled form of terbutaline, starts working within 15 minutes and can last up to 6 hours. It is also sold as an injectable solution, an oral tablet, and as a syrup (in combination with guaifenesin). Terbutaline is a pregnancy category C medication and is prescribed to stop
Bambuterol is a long-acting β adrenoceptor agonist (LABA) used in the treatment of asthma; it also is a prodrug of terbutaline. Commercially, the AstraZeneca pharmaceutical company produces and markets bambuterol as Bambec and Oxeol .
Salbutamol and terbutaline are also both available in oral forms. [11] 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 ...
Ritodrine is a short-acting β 2-adrenoreceptor agonist — a class of medication used for smooth muscle relaxation (other similar drugs are used in asthma or other pulmonary diseases such as salbutamol (albuterol)).
These drugs are often first-line treatment for the target diseases and are effective in tackling the symptoms. An example of the target disease is ischemic heart disease. Some examples of commonly prescribed drugs for this disease are beta-blockers , calcium-channel blockers and nitrates.
Administration of tocolytic treatment with β2-adrenergic drugs has shown to stabilize uterine contractions while also effectively lowering Fetal Heart Rate. The usage of a balloon catheter to induce labor rather than Prostoglandin E 2 lowers the risk of uterine hyperstimulation and its effect on fetal heart rate.
Levosalbutamol's bronchodilator properties give it indications in treatment of COPD (chronic obstructive pulmonary disease, also known as chronic obstructive lung disease) and asthma. Like other bronchodilators, it acts by relaxing smooth muscle in the bronchial tubes , and thus shortening or reversing an acute "attack" of shortness of breath ...