Can I take Bisoprolol and Trimbow pmdi // pressurised inhalation together?
Drug interaction guide
Originally published 25 Jan 2026
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Bisoprolol and Trimbow (which contains formoterol) work in opposite ways on the airways. Bisoprolol may cause the airways to narrow, making it harder to breathe and potentially triggering asthma or COPD symptoms. It also makes the formoterol in the Trimbow inhaler less effective at opening your airways.
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Why this happens
Bisoprolol is a 'beta-blocker' and formoterol (in Trimbow) is a 'beta-agonist'. They compete for the same receptors in the lungs. Bisoprolol blocks these receptors, which can cause the bronchial tubes to tighten and prevents the inhaler from working properly.
What you should do
You must speak to your doctor before using these together. Doctors generally avoid prescribing beta-blockers like bisoprolol to patients with breathing conditions unless there is no other option. If you must take both, your doctor will monitor your breathing closely. Seek medical help immediately if you experience sudden wheezing or shortness of breath.
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Important precautions
Acute breathing distress
Bisoprolol is a beta-blocker and can cause narrowing of the airways, potentially triggering a severe asthma attack or worsening breathing difficulties. This is particularly important as you are also using Trimbow for a lung condition.
Diabetes
Bisoprolol can mask the warning signs of low blood sugar (hypoglycaemia), such as a fast heartbeat or tremors. You will need to monitor your blood sugar more closely.
Food and drink warnings
Alcohol
Alcohol can increase the blood-pressure-lowering effect of bisoprolol, which may make you feel dizzy, lightheaded, or faint, especially when you first start taking it or when your dose is increased. It is best to limit alcohol intake until you know how the medicine affects you.
Cafeína
Trimbow contains formoterol, a medicine that can increase your heart rate. Consuming large amounts of caffeine (found in coffee, tea, energy drinks, and chocolate) may worsen this effect, leading to palpitations, tremors, or a rapid heartbeat.
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Using other medicines
Taking multiple medicines? Our Medicines Interaction Checker helps you check whether your prescriptions, over-the-counter medicines, and supplements are safe to take together. Simply search for your medicines to see potential interactions and what to do about them.
Descargo de responsabilidad
This information is for general educational purposes only and should not be relied upon as a substitute for professional medical advice. Always consult your GP, pharmacist, or another qualified healthcare professional before making decisions about your medications. Individual circumstances may vary, and only a healthcare professional who knows your medical history can provide personalised guidance.
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Historia del artículo
La información de esta página ha sido redactada y revisada por médicos cualificados.
25 Enero 2026 | Publicado originalmente

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