Definition Beta-Adrenergic receptor-agonists (Terbutaline) Ritodrine is the only FDA approved medication in this class, but (ironically) isn’t available in the US. Thus, terbutaline is frequently used for this indication. Beta-agonists relax smooth muscles, including the myometrium. Binding of the receptor increases intracellular levels of cyclic AMP. This increase in intracellular levels of cyclic AMP activates […]