Respiratory
Long-acting bronchodilators
LABAs and LAMAs — Maintenance inhalers that keep airways open in asthma and COPD.
Education and reference only. This is a plain-language class overview — it deliberately contains no doses. Always check the current Summary of Product Characteristics (SmPC), the BNF and your local formulary before prescribing or administering any medicine.
What it is
Long-acting bronchodilators are maintenance ("controller") inhalers used regularly to keep the airways open in asthma and COPD. They include long-acting beta-agonists (LABAs) and long-acting muscarinic antagonists (LAMAs).
How it works
LABAs relax airway smooth muscle by stimulating beta-2 receptors; LAMAs do so by blocking the muscarinic receptors that cause airways to tighten. Both keep the airways wider for many hours, but neither acts fast enough to relieve a sudden attack.
In practice
In practice the golden rule in asthma is that a long-acting beta-agonist must never be used alone — it is always paired with an inhaled corticosteroid, because LABA monotherapy in asthma is unsafe. In COPD, long-acting beta-agonists (LABAs) and long-acting muscarinic antagonists (LAMAs) are maintenance mainstays, often combined. These are preventers, not relievers, so good inhaler technique and adherence matter more than anything; we check technique at review and confirm the patient still has and knows how to use their short-acting reliever.
Examples
Practical use
How to take it & use it well
- Use long-acting bronchodilators (LABAs such as salmeterol and LAMAs such as tiotropium) every day at about the same times, even when you feel well, as they work to keep airways open over many hours rather than for sudden relief.
- Learn the correct technique for your specific inhaler or device, as dry-powder, soft-mist and pressurised devices are each used differently; ask your pharmacist or asthma nurse to watch you use it.
- In asthma, a LABA must always be used together with an inhaled steroid (usually in a single combination inhaler), never on its own, because a LABA alone can mask worsening inflammation.
- Keep your separate fast-acting reliever inhaler to hand for sudden breathlessness; long-acting bronchodilators are preventers and do not act quickly enough to treat an attack.
- Rinse your mouth and spit out after combination inhalers that contain a steroid to lower the chance of oral thrush and a hoarse voice.
- Use the dose counter where fitted to know when the device is running low, and order a repeat in good time so you never run out.
Common uses
- Maintenance treatment of COPD
- Asthma — LABA only ever combined with an inhaled corticosteroid
- Combination inhalers for persistent symptoms
Monitoring
- Symptom control, exacerbations and inhaler technique
- Adherence to regular use
- That the patient still carries and can use a reliever
Weighing it up
Advantages & disadvantages
Advantages
- They give steady, long-lasting opening of the airways, easing breathlessness and improving day-to-day activity in asthma and COPD.
- Once or twice daily dosing fits easily into a routine and supports good adherence.
- Used appropriately, they reduce flare-ups and can lower how often a rescue reliever is needed.
- Different molecules and device types are available, so treatment can be matched to your needs and dexterity.
Disadvantages
- They do not relieve a sudden attack, so a fast-acting reliever is still essential.
- LAMAs can cause a dry mouth, and some people notice throat irritation or a mild tremor with LABAs.
- Poor inhaler technique greatly reduces benefit, and devices vary, which can be confusing.
- In asthma a LABA used without an inhaled steroid is unsafe and linked to worse outcomes.
Key safety principles
What to watch for
- In asthma a LABA must NEVER be used without an inhaled corticosteroid.
- These are preventers — they do not relieve an acute attack; a reliever is still needed.
- LAMAs can cause dry mouth and need caution in narrow-angle glaucoma and urinary retention.
Key interactions
What to avoid or check alongside
- Other LAMAs or short-acting muscarinic relievers (such as ipratropium) used at the same time can add to dry mouth and, rarely, urinary or eye effects.
- Beta-blockers, including some eye drops for glaucoma, can oppose the airway-opening action of LABAs and may trigger wheeze in susceptible people.
- Combining a LABA with high-dose beta-agonist relievers or certain diuretics may lower blood potassium and affect the heart rhythm.
- Some antifungals and other strong enzyme inhibitors can raise levels of certain LABAs, increasing the chance of palpitations.
- Medicines that can prolong the heart's QT interval may add to a small QT risk with some long-acting bronchodilators.
Patient & carer advice
- Use these every day, even when you feel well — they prevent rather than relieve
- Keep using your separate reliever inhaler for sudden breathlessness
- Ask us to check your inhaler technique at each review
Use with
Related clinical calculators
Dose and risk decisions for this class often depend on renal function, weight or bleeding/stroke risk. These tools help:
Answers
Long-acting bronchodilators: frequently asked questions
Can I use a long-acting bronchodilator to treat an asthma attack?
No. Long-acting bronchodilators are preventers that work slowly over many hours. During a sudden attack you need your fast-acting reliever inhaler, and you should seek urgent help if it does not settle.
Why must a LABA be combined with a steroid inhaler in asthma?
A LABA opens the airways but does not treat the underlying inflammation. Used alone in asthma it can hide worsening control and is linked to worse outcomes, so it is always paired with an inhaled steroid, usually in one combination inhaler.
What is the difference between a LABA and a LAMA?
Both keep airways open for many hours but by different mechanisms. LABAs such as salmeterol relax airway muscle through beta receptors, while LAMAs such as tiotropium block muscarinic receptors. They are sometimes used together, especially in COPD.
Will I need to take these inhalers for life?
Many people with COPD or persistent asthma use them long term to stay well. Your clinician reviews your control regularly and may step treatment up or down, so do not stop on your own without advice.
Why does my mouth feel dry on a LAMA inhaler?
Dry mouth is a common, usually mild side effect of LAMAs such as tiotropium. Sips of water, sugar-free gum and good oral care help. Tell your pharmacist if it is troublesome or if you have eye pain or difficulty passing urine.
Authoritative sources
Always verify against the source
This overview is for orientation. For doses, interactions, contra-indications and the full monograph, use:
Related guides
Need a custom medicines or prescribing resource?
We build evidence-led clinical references, calculators and decision aids for teams.