Salbetol
✅ Asthma symptom relief
✅ Convenient oral dosage
✅ Bronchodilation in tablet form
✅ Manage wheezing effectively
✅ Portable asthma solution
Salbetol Tablet contains Salbutamol.
✓ Medically reviewed by Morgan Ellis — Pharmacy Researcher · 8 years experience · Last reviewed: May 2026
⚡ Quick Answer — What is Salbetol?
Salbetol contains salbutamol (known as albuterol in the United States), a short-acting beta-2 agonist (SABA) that relaxes bronchial smooth muscle to relieve breathlessness, wheezing, and chest tightness in asthma and chronic obstructive pulmonary disease (COPD). Salbetol is a tablets from Microbax India. Onset of bronchodilation is 15–30 minutes and effect lasts 4–6 hours. Salbetol is a reliever (rescue) medication, not a controller — needing it more than 3× per week means underlying asthma is not controlled and a preventer (ICS or ICS-LABA) needs stepping up.
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What Is Salbetol?
Salbetol is a tablets manufactured by Microbax India at WHO-GMP certified facilities. Each tablet delivers 2 mg or 4 mg of salbutamol (the international generic name is albuterol). salbutamol is on the WHO List of Essential Medicines and is the world’s most-used reliever medication for asthma and reversible airflow obstruction.
How Does Salbetol Work?
salbutamol selectively activates beta-2 adrenergic receptors on the smooth muscle that rings the bronchial airways. Receptor activation raises intracellular cyclic AMP, smooth muscle relaxes, and the airway lumen widens — this is bronchodilation. Bronchodilation begins within 15–30 minutes, peaks at 30–90 minutes, and lasts 4–6 hours. salbutamol also modestly inhibits mast-cell mediator release, reduces plasma exudation from airway capillaries, and improves mucociliary clearance.
Selectivity is dose-dependent: at therapeutic doses, β2 effects predominate; at higher systemic doses (oral tablets, repeated nebulisation), spillover onto β1 receptors causes tachycardia and palpitations, and onto β2 receptors elsewhere causes tremor and hypokalaemia.
Uses and Indications
- Acute asthma exacerbations — first-line reliever (rescue) inhaler/nebulisation
- Chronic obstructive pulmonary disease (COPD) — symptomatic relief of acute breathlessness and exercise dyspnoea
- Exercise-induced bronchoconstriction — inhaled 15–30 minutes before exercise
- Bronchospasm with allergen, cold air, or viral exposure
- Anaphylaxis with bronchospasm — adjunct to adrenaline
- Hyperkalaemia (off-label) — nebulised salbutamol drives K⁺ intracellularly
Important: Salbetol is a reliever, not a controller. It does not reduce underlying airway inflammation. Patients using more than the equivalent of one SABA canister per month, or needing a SABA more than three days per week outside of exercise pre-dosing, have poorly-controlled asthma and require step-up to inhaled corticosteroid (ICS) or ICS-LABA combination therapy.
Salbetol Dosage
| Patient | Dose | Frequency |
|---|---|---|
| Adults & children >12 yr | 2–4 mg | Three to four times daily |
| Children 6–12 yr | 2 mg | Three to four times daily |
| Children 2–6 yr | 1–2 mg | Three to four times daily |
| Elderly / sensitive | Start at 2 mg TDS | Titrate to response |
How to Use Salbetol Properly
- Swallow with a glass of water; can be taken with or without food.
- Space doses at least 4 hours apart.
- Most adults and children do better with an inhaler + spacer than with oral tablets — fewer systemic side effects.
- If a dose is missed, take it as soon as remembered unless the next is due — never double up.
Side Effects of Salbetol
Common (dose-related, settle within 30–60 minutes):
- Fine tremor, especially of the hands
- Palpitations or increased heart rate (typically 10–20 bpm rise)
- Headache
- Dry mouth, throat irritation
- Muscle cramps
- Hyperactivity or agitation in young children
Less common:
- Hypokalaemia — especially with high repeat doses, worsened by theophylline, steroids or loop diuretics
- Mild hyperglycaemia
- Insomnia if dosed late evening
- Lactic acidosis with very high continuous nebulised doses (rare)
Serious (stop and seek emergency help):
- Severe allergic reaction / angio-oedema / anaphylaxis
- Paradoxical bronchospasm — worsening wheeze immediately after dose
- Cardiac arrhythmias (atrial fibrillation, supraventricular tachycardia)
- Severe hypokalaemia with arrhythmia or muscle weakness
Warnings and Precautions
- Frequent {$brand} use = poor asthma control. Needing a reliever more than 3 days per week (excluding exercise pre-dosing) means the underlying disease is not managed. Step up ICS-based controller therapy.
- Carry your reliever with you — many fatal asthma attacks happen when the inhaler is at home or expired.
- Cardiovascular disease: use cautiously in severe coronary artery disease, arrhythmias, hyperthyroidism, or severe heart failure.
- Diabetes: monitor glucose with repeat high doses.
- Pregnancy and breastfeeding: salbutamol is used at the lowest effective dose. Uncontrolled asthma is more dangerous to mother and fetus than the drug itself.
- Severe attack red flags (call emergency services): no relief 10 min after a full dose, peak flow <50% of personal best, difficulty speaking in full sentences, blue lips or drowsiness.
Contraindications
- Known hypersensitivity to salbutamol or any formulation excipient
- Tachyarrhythmias (uncontrolled) — relative contraindication
- Phaeochromocytoma — relative contraindication
- Hypertrophic obstructive cardiomyopathy — caution
Drug Interactions
| Interacting drug | Effect | What to do |
|---|---|---|
| Non-selective beta-blockers (propranolol, timolol drops) | Block β2 effect — can precipitate severe bronchospasm | Avoid; switch to cardioselective beta-blocker if essential |
| Loop or thiazide diuretics | Additive hypokalaemia | Monitor serum potassium with high doses |
| Systemic corticosteroids | Additive hypokalaemia + hyperglycaemia | Monitor electrolytes and glucose |
| Theophylline / aminophylline | Additive tachycardia and hypokalaemia | Monitor heart rate and potassium |
| MAOIs and tricyclic antidepressants | Potentiate cardiovascular effects | Caution — monitor BP/HR |
| Digoxin | Hypokalaemia increases digoxin toxicity risk | Monitor potassium; check digoxin level if symptomatic |
Storage
- Store below 25°C in a cool, dry place away from direct sunlight.
- Keep in original packaging until use to protect from moisture and light.
- Do not use after the expiry date printed on the strip.
- Keep out of reach of children.
Related Alternatives on MedsBase
- Asthalin Respules — salbutamol nebuliser solution
- Budecort Inhaler — budesonide ICS preventer
- Foracort Inhaler — budesonide + formoterol ICS-LABA
- Seretide Accuhaler — fluticasone + salmeterol ICS-LABA
- Duolin Inhaler — salbutamol + ipratropium combo reliever
Frequently Asked Questions
How is Salbetol different from Asthalin?
Salbetol (Microbax) and Asthalin (Cipla) are both Indian-market generic brands of salbutamol. The same molecule, same strengths (2 mg / 4 mg), same indications. Brand choice is usually based on availability, price, and prescriber familiarity.
When is oral salbutamol preferred over inhaled?
When the patient cannot reliably use an inhaler (very young, severe arthritis, dementia, cognitive impairment), as an overnight cover for nocturnal asthma break-through, or when the cost of an inhaler is a barrier. For most patients, inhaled salbutamol is first choice.
Will Salbetol cure my asthma?
No — salbutamol relieves symptoms but does not modify underlying airway inflammation. Long-term control requires an inhaled corticosteroid (ICS) preventer.
Can I take Salbetol every day?
Yes, if your doctor has prescribed it that way. Daily reliever use, however, is a marker of poorly-controlled asthma — a preventer should be stepped up alongside or instead.
How long does one tablet last?
4–6 hours of bronchodilation, with onset around 15–30 minutes after swallowing.
What are the most common side effects?
Fine tremor (hands), palpitations, mild headache, occasional dry mouth or muscle cramps. These are dose-related and usually settle in 30–60 minutes.
Is Salbetol safe in pregnancy?
Salbutamol is widely used in pregnancy and considered low-risk; uncontrolled asthma is more dangerous to mother and fetus than the medication. Inhaled is preferred over oral.
Can I drink alcohol on Salbetol?
Moderate alcohol does not interact directly with salbutamol but can worsen reflux that triggers cough/wheeze. Heavy drinking is not advised in any chronic respiratory illness.
What should I do if I overdose on Salbetol?
Symptoms include severe tremor, racing heart, low potassium (muscle weakness, cramps), nausea, and headache. Seek emergency care — treatment is supportive (potassium replacement, beta-blocker only if cardioselective and under specialist care).
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| Strength | 4 mg |
|---|---|
| Quantity | 30 Tablet/s, 60 Tablet/s, 90 Tablet/s, 180 Tablet/s |
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