Albuterol

What albuterol (the US adopted name for salbutamol) is and how it works

Albuterol is a prescription-only quick-relief (rescue) inhaler used to treat or prevent sudden breathing difficulty (bronchospasm) caused by asthma or other reversible airway conditions. It works within minutes and its effect lasts around 4-6 hours. (1)

Use your albuterol inhaler exactly as your prescriber directs for quick relief of wheezing, coughing, or shortness of breath. If you find you need it more and more often, this is a real warning sign that your asthma is not well controlled and needs a review with your prescriber -- it is not something to manage by increasing your own dose or changing your other medicines yourself.

Mechanism of action: how albuterol (the US adopted name for salbutamol) works

Albuterol is a selective beta-2 adrenergic receptor agonist that relaxes bronchial smooth muscle, producing bronchodilation within minutes with an effect lasting approximately 4-6 hours. (1)

What albuterol (the US adopted name for salbutamol) is used for

Before taking albuterol (the US adopted name for salbutamol)

Do not take / not appropriate for

• Do not use albuterol if you have had a hypersensitivity reaction to albuterol or any component of the inhaler. (all countries) (1)

Tell your clinician about

• Any heart conditions, including coronary artery disease, irregular heartbeat, or high blood pressure.
• Any history of seizures or diabetes.
• Any history of low potassium levels.
• All other medicines you use, especially other inhalers, beta-blockers, diuretics ('water tablets'), or antidepressants.
• Pregnancy, plans for pregnancy, or breastfeeding.
• How often you are using your rescue inhaler -- needing it more often than usual is important information for your prescriber, not something to manage on your own.

How to take albuterol (the US adopted name for salbutamol)

• Use exactly as prescribed, shaking the inhaler well before each use and using the correct inhaler technique your prescriber or pharmacist showed you.
• This is a rescue/reliever inhaler for quick relief of symptoms, or to prevent symptoms shortly before exercise -- it is not meant to be your main, ongoing asthma treatment.
• If you notice you are using your rescue inhaler more often than your prescriber advised, contact your prescriber for a review of your asthma control -- this is a real sign your asthma treatment plan may need adjusting.
• If your breathing suddenly gets worse right after using this inhaler, this can be a rare but serious reaction to the inhaler itself (paradoxical bronchospasm) -- seek emergency medical help immediately.

Procedures and treatment changes

Tell the treating team before surgery, procedures, or any medicine change. Do not alter treatment without the responsible clinician. (1) (3) (2) (4) (5) (6)

Missed dose

Albuterol is generally used as needed for symptoms or before exercise rather than on a fixed schedule, so a 'missed dose' does not usually apply in the way it does for regular daily medicines. If you use albuterol on a scheduled basis for any reason, ask your prescriber or pharmacist for specific guidance.

Overdose

Seek emergency medical help immediately if an overdose is suspected. Reported effects of excessive use include chest pain, a fast or irregular heartbeat, tremor, and seizures; fatalities have been reported with excessive use of inhaled bronchodilators like albuterol. (1)

Side effects

Side effects and their urgency vary; report severe, persistent, or concerning symptoms.

Serious warnings

Interactions

• Other sympathomimetic aerosol bronchodilators should generally not be used at the same time as albuterol. (1)
• Beta-blocker medicines can reduce albuterol's effect and, in susceptible patients, may cause severe bronchospasm. (1) (2)
• Diuretics ('water tablets') and steroid medicines can add to the risk of low potassium (hypokalemia) from albuterol. (1) (2)
• MAOIs and tricyclic antidepressants can increase albuterol's cardiovascular effects. (1)

Pregnancy, breastfeeding, kidney/liver function, age

Monitoring

Before starting

• Baseline asthma control assessment
• Cardiovascular history review
• Inhaler technique check

During treatment

• Track how often you use your rescue inhaler -- increasing use is a signal for prescriber review, not self-management.
• Watch for cardiovascular symptoms (chest pain, palpitations) and for paradoxical worsening of breathing right after a dose.
• Periodic asthma control review with your prescriber.

Storage

Store between 15-25°C (59-77°F). Do not puncture, break, or burn the canister, even when it appears empty.

Frequently asked questions

References

1. PROAIR HFA (albuterol sulfate) inhalation aerosol -- full prescribing informationU.S. Food and Drug Administration / DailyMed (NIH), full prescribing information, Teva (ProAir HFA) · United States · accessed 2026-07-29 · source 1
2. Ventolin Evohaler 100 micrograms -- Summary of Product Characteristicselectronic medicines compendium (emc), United Kingdom -- GSK · United Kingdom · accessed 2026-07-29 · source 2
3. Levosalbutamol, salbutamol -- list of nationally authorised medicinal products / PSUSA single assessmentEuropean Medicines Agency (EMA) -- salbutamol is nationally authorised across EU member states via national procedures · European Union · accessed 2026-07-29 · source 3
4. Ventolin HFA (salbutamol) Product MonographHealth Canada product monograph · Canada · accessed 2026-07-29 · source 4
5. Ventolin (salbutamol) -- ARTG registrationsTherapeutic Goods Administration (TGA), Australia · Australia · accessed 2026-07-29 · source 5
6. Ventolin (salbutamol) New Zealand Data SheetsMedsafe (New Zealand regulator) · New Zealand · accessed 2026-07-29 · source 6

Brand names by country

Single-ingredient albuterol (the US adopted name for salbutamol) names are shown separately by country. Product availability, strengths, and supply rules can change; combination products are not included here.

Priority countries