Overview:
Albuterol, known in the UK as Salbutamol, is a reliever inhaler used to quickly open the airways and make breathing easier during asthma or chronic obstructive pulmonary disease (COPD) attacks. It works within minutes and is an essential medicine for people with asthma symptoms such as wheezing, coughing, or shortness of breath.
How It Works:
Albuterol relaxes the muscles in the walls of the airways, allowing them to open wider and make breathing easier. It targets specific receptors in the lungs that respond to adrenaline-like substances. This relaxation helps relieve tightness in the chest and improves airflow to the lungs almost immediately.
Mode of Action:
When you inhale albuterol, it binds to beta-2 receptors found in the muscles that surround your airways. This causes these muscles to relax, which widens the airways (a process called bronchodilation). It also helps clear mucus and improves oxygen delivery to the lungs. The effects start within about 5 minutes and last for 3–5 hours.
Common Side Effects:
- Trembling or shaking hands
- Headache
- Nervousness or feeling jittery
- Faster heartbeat
- Mild muscle cramps
Serious Side Effects:
- Very fast or irregular heartbeat
- Chest pain or severe palpitations
- Worsening breathing instead of improvement (a rare “paradoxical spasm”)
- Low potassium levels (after very high or repeated doses)
- Allergic reaction (swelling, rash, or difficulty breathing — rare)
