Short-acting beta-2 agonists

Short-acting beta-2 agonists relax the muscles around the airways within minutes. They are rescue inhalers for sudden asthma symptoms and bronchospasm and are also used before exercise to prevent symptoms. Shakiness, nervousness, and a fast heart rate are common, especially at high doses. Needing a rescue inhaler more often is a sign that asthma is poorly controlled and maintenance treatment needs adjusting.

• AlbuterolKnown brand names include Ventolin, ProAir, and Proventil.