Which SABA is known for causing tremors as a side effect?

Albuterol is a short-acting beta-agonist (SABA) commonly used in the management of asthma and other respiratory conditions. One of the well-documented side effects of Albuterol is the potential to cause tremors. This occurs because Albuterol stimulates beta-2 adrenergic receptors, leading to relaxation of bronchial smooth muscle and bronchodilation; however, it can also activate similar receptors in skeletal muscle, which can result in muscle tremors.

The other medications listed do not cause tremors as a common side effect in the same way that Albuterol does. Levalbuterol, while related, generally has a lower incidence of tremors due to its selectivity for beta-2 receptors. Formoterol, on the other hand, is a long-acting beta agonist (LABA) and may have different side effects and a different risk profile. Digoxin is not a bronchodilator and does not fall into the category of beta agonists, thus it does not produce tremors related to the activation of these receptors. Understanding these distinctions helps clarify why Albuterol is specifically known for causing this side effect.