What it's for (Indications)
- Bambuterol is indicated for the regular treatment of chronic asthma and other conditions where reversible airways obstruction is present, such as chronic obstructive pulmonary disease (COPD) and chronic bronchitis.
- It acts as a long-acting bronchodilator to maintain patent airways and reduce the frequency and severity of symptoms.
Dosage Information
| Type | Guideline |
|---|---|
| Standard | The dosage of bambuterol must be individualized by a healthcare professional based on the patient's age, medical condition, and response to therapy. It is typically administered orally once daily, often at bedtime, to provide sustained bronchodilation. Dosage adjustments may be necessary to achieve optimal symptom control while minimizing side effects. For adults and adolescents, a common starting dose is 10 mg once daily, which may be increased to 20 mg once daily after one to two weeks, depending on clinical response and tolerability. In patients with renal impairment, a reduced dose may be required. |
Safety & Warnings
Common Side Effects
- Common side effects associated with bambuterol, due to its beta-adrenergic activity, include tremor, headache, palpitations, dizziness, nausea, and muscle cramps.
- Less common but significant side effects can involve tachycardia, arrhythmias, sleep disturbances, anxiety, and restlessness.
- Metabolic effects such as transient increases in blood glucose and decreases in serum potassium (hypokalemia) have also been reported.
- If any severe or persistent side effects occur, medical attention should be sought immediately.
Serious Warnings
- Black Box Warning: WARNING: ASTHMA-RELATED DEATH. Long-acting beta2-adrenergic agonists (LABAs) such as bambuterol, when used as monotherapy for asthma, increase the risk of asthma-related death. Data from a large placebo-controlled US study (Salmeterol Multicenter Asthma Research Trial [SMART]) showed an increased risk of asthma-related deaths in patients receiving salmeterol, another LABA. This finding is considered a class effect for LABAs, including bambuterol. Therefore, bambuterol should not be used as monotherapy for the treatment of asthma and should only be used in conjunction with an inhaled corticosteroid (ICS). It is not indicated for the relief of acute bronchospasm. The medication should be discontinued once asthma control is achieved, if possible, and patients should be regularly reassessed. The safety and effectiveness of bambuterol in patients with asthma have not been established when used without a concomitant ICS.
- Bambuterol should not be used for the relief of acute bronchospasm; a fast-acting inhaled beta-2 agonist is required for such events.
- Caution is advised in patients with cardiovascular disorders, including coronary insufficiency, cardiac arrhythmias, and hypertension, as bambuterol can cause cardiovascular effects such as changes in heart rate and blood pressure.
- It should also be used with caution in patients with diabetes mellitus (due to potential for hyperglycemia), hyperthyroidism, seizure disorders, or glaucoma.
- Paradoxical bronchospasm, a rare but serious adverse event, can occur with inhaled bronchodilators; if this happens, bambuterol should be discontinued immediately.
- Clinicians should monitor for hypokalemia, especially in patients receiving concomitant xanthine derivatives, corticosteroids, or diuretics, as this may increase the risk of cardiac arrhythmias.
How it Works (Mechanism of Action)
Bambuterol is a prodrug of terbutaline, a selective beta-2 adrenergic receptor agonist. After oral administration, bambuterol is slowly metabolized in the liver and intestinal mucosa by hydrolysis and oxidation to release its active metabolite, terbutaline. Terbutaline acts by stimulating beta-2 adrenergic receptors primarily in the bronchial smooth muscle. This stimulation leads to the activation of adenyl cyclase, which increases the intracellular concentration of cyclic AMP (cAMP). Elevated cAMP levels result in the relaxation of bronchial smooth muscle, leading to bronchodilation. It also inhibits the release of mediators from mast cells and reduces vascular permeability, contributing to its anti-asthmatic effects.
Commercial Brands (Alternatives)
No other brands found for this formula.