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Safer than both nifedipine and beta agonists; As effective as nifedipine and more effective than beta agonists. [29] Fewer side effects than β 2 agonists. [30] Although not FDA approved in the US, atosiban was developed specifically to delay preterm labor. [31] No current contraindications No maternal adverse effects [32]
Terbutaline, sold under the brand names Bricanyl and Marex among others, is a β 2 adrenergic receptor agonist, used as a "reliever" inhaler in the management of asthma symptoms and as a tocolytic (anti-contraction medication) to delay preterm labor for up to 48 hours.
Beta adrenergic agonists or beta agonists are medications that relax muscles of the airways, causing widening of the airways and resulting in easier breathing. [1] They are a class of sympathomimetic agents, each acting upon the beta adrenoceptors . [ 2 ]
As terbutaline is selective to β2 receptors, it has relatively less effect on the heart, preventing heart-related side effects. [12] Side effects of terbutaline includes peripheral vasodilation, tremor due to stimulation of β2 receptors in skeletal muscle , and tachycardia due to slight effect on β1 receptors. [ 13 ]
Inhaled short-acting β2-adrenergic agonists, such as terbutaline and salbutamol, are the first-line drugs indicated for asthma exacerbation for all patients to provide rapid bronchodilating effects. [1] [2] Short-acting β2-adrenergic agonists can be delivered by different devices, for example, nebulizers and metered-dose inhalers. [2]
Administration of higher doses of short-acting β 2-agonists increases duration of action but also increases side effects such as cardiac effects. One approach to avoid these side effects is to use structurally different features that may minimize absorption into systemic circulation. For example, one could use drugs that transform into ...
Beta 2-adrenergic agonists, also known as adrenergic β 2 receptor agonists, are a class of drugs that act on the β 2 adrenergic receptor. Like other β adrenergic agonists , they cause smooth muscle relaxation. β 2 adrenergic agonists' effects on smooth muscle cause dilation of bronchial passages , vasodilation in muscle and liver ...
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)). Since ritodrine has a bulky N-substituent, it has high β 2-adrenergic receptor selectivity.