Short-Acting Beta Agonists (SABA)

Respiratory

Mark this drug class

Examples

salbutamol (albuterol)terbutaline

Prefix / Suffix: -ol

Physiology

β2 receptors in the lungs cause bronchodilation when stimulated. In asthma, bronchoconstriction narrows the airways. SABAs rapidly relax airway smooth muscle.

Mechanism of Action

They stimulate β2 receptors in the lungs, causing rapid bronchodilation.

Indications

Acute asthma attack
Bronchospasm relief
Rescue therapy

Side Effects / Adverse Effects

Tachycardia (β1 stimulation at higher doses)
Tremors (β2 stimulation in skeletal muscle)
Palpitations
Hypokalemia (shift of potassium into cells)

Contraindications

Severe tachycardia
Use cautiously in cardiac patients

Nursing Considerations

Use as rescue inhaler, not for maintenance (frequent use indicates poor asthma control)
Assess respiratory status before and after use (improvement confirms effectiveness)
Monitor heart rate (risk of tachycardia, especially with repeated doses)
Teach correct inhaler technique (ensures drug reaches lungs)
If patient uses it more than 2 times/week, report (indicates need to step up therapy)

Ask PharmPal Nurse

Your AI tutor for Short-Acting Beta Agonists (SABA)

Ask me anything about this drug class.

Disclaimer: PharmPal Nurse is for education only and is not medical advice. Do not use it to diagnose, treat, prescribe, or make patient-care decisions; always verify with current drug references, your instructor, facility policy, and a licensed provider. In emergencies, call local emergency services.