Drug interactions
Ipratropium-salbutamol + Penbutolol
Severity: Major
Ipratropium-salbutamol and Penbutolol: major interaction.
Last updated
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Penbutolol is a non-selective beta-blocker that can block the bronchodilator effect of salbutamol and may provoke bronchospasm in patients with asthma or COPD. This can leave salbutamol ineffective just when it is needed.
What this interaction means in plain words
Ipratropium-salbutamol and Penbutolol can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Why it happens
Competitive antagonism at beta-2 adrenergic receptors in the airways.
What to do
Avoid non-selective beta-blockers in patients with asthma or significant reactive airway disease, and choose a cardioselective agent if a beta-blocker is needed. If used together, monitor respiratory status closely and be prepared to use higher bronchodilator doses.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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Other interactions of Ipratropium-salbutamol
Frequently asked questions
Can I take Ipratropium-salbutamol with Penbutolol?
MediHelp rates the interaction as major. Ipratropium-salbutamol and Penbutolol can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Penbutolol is a non-selective beta-blocker that can block the bronchodilator effect of salbutamol and may provoke bronchospasm in patients with asthma or COPD. This can leave salbutamol ineffective just when it is needed.
How serious is the interaction between Ipratropium-salbutamol and Penbutolol?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid non-selective beta-blockers in patients with asthma or significant reactive airway disease, and choose a cardioselective agent if a beta-blocker is needed. If used together, monitor respiratory status closely and be prepared to use higher bronchodilator doses.
What other medicines interact with Ipratropium-salbutamol?
MediHelp also lists interactions of Ipratropium-salbutamol with, for example, Amisulpride, Arsenic trioxide, Carvedilol. The full list is on the Ipratropium-salbutamol page.
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