Beta-2 Agonists in Respiratory Therapy

Overview of Beta-2 Agonists

• Beta-2 agonists are medications primarily used to treat respiratory conditions by facilitating bronchodilation.

Levalbuterol

• Generic Name: Levalbuterol

• Brand Name: Xopenex

• Class: SABA (Short-Acting Beta-2 Agonist)

• Onset of Action: 10-15 minutes

• Duration of Action: 4-6 hours

• Dosage: 0.63 mg administered

  • Doses can be given 3 times daily

• Indications:

  • Asthma

  • COPD (Chronic Obstructive Pulmonary Disease)

  • Respiratory infections

• Side Effects / Adverse Drug Reactions (ADRs):

  • Nervousness

  • Tremors

  • Tachycardia (not as frequent as with albuterol)

• Contraindications:

  • Do not use if allergic to levalbuterol

• Formulation: Dry powder inhaler (DPI) for maintenance therapy.

Salmeterol

• Generic Name: Salmeterol

• Brand Name: Serevent Diskus

• Class: LABA (Long-Acting Beta-2 Agonist)

• Onset of Action: 20 minutes

• Duration of Action: 12 hours

• Dosage: 50 mcg per puff

• Indications:

  • Reversible bronchospasm due to asthma

• Side Effects / Adverse Drug Reactions (ADRs):

  • Tachycardia

  • Tremors

  • Nervousness

  • Sore throat

  • Laryngitis

• Contraindications:

  • Do not use if allergic to Salmeterol

Note: LABAs should not be used as a sole treatment for asthma but rather in conjunction with inhaled corticosteroids (ICS) to reduce the risk of asthma exacerbations.

• Important Considerations:

  • Monitor for atorvastatin effects in patients, particularly those who have underlying heart conditions.

  • Patient education regarding the correct use of inhalers is essential for medication efficacy.