Bumetanide

What is bumetanide?

Bumetanide is a prescription-only loop diuretic. These are often called a ‘water tablet’, due to their effect on the body. Bumetanide helps remove excess fluid from the body by increasing the amount of urine produced. It is commonly prescribed when fluid builds up in the body – a condition known as oedema[1]. 

What is bumetanide used for?

Bumetanide is mainly used to treat oedema caused by heart failure, fluid retention due to liver disease, and oedema associated with kidney disorders[1]. 

How does bumetanide work?

Bumetanide acts on a part of the kidneys called the loop of Henle. In doing so, it blocks the reabsorption of sodium and chloride – leading to increased urine output. This action helps reduce fluid build-up and can ease symptoms such as swelling and breathlessness[1]. 

Who can take bumetanide?

Most adults can safely take bumetanide without seeing side effects. However, it may not be suitable for people who are dehydrated, or who have low blood pressure, kidney or liver problems, gout, or diabetes. Likewise, it’s not generally prescribed for those who are pregnant or breastfeeding, unless advised by a specialist that it is safe[1].  

Please tell your doctor or pharmacist about any conditions you may have or medication you take before you start treatment, and always follow the instructions in the Patient Information Leaflet[2].  

How do you take bumetanide?

Bumetanide is usually taken in the morning, with or without food. This is simply to avoid needing to wake up and use the toilet at night. If you’ve been prescribed bumetanide tablets, swallow them whole with water. If you’re using the liquid form, measure the dose using the spoon or syringe provided – not other implements, such as kitchen teaspoons, which aren’t as accurate. Do not take bumetanide after 4pm otherwise it may affect your sleep. Whatever form you are prescribed, take it exactly as recommended by your doctor or pharmacist[1]. 

What is the typical dosage of bumetanide?

Bumetanide is available as 1mg and 5mg tablets and as a liquid containing 1mg in 5ml. The usual dose of bumetanide for adults is 1mg to 10mg daily, taken in the morning. Your doctor or pharmacist may adjust your dose depending on your condition – you should always follow the instructions on the label or from your healthcare professional[1]. 

Can you stop taking bumetanide suddenly?

You should not stop taking bumetanide suddenly unless your doctor tells you to. This is because stopping the medicine may cause fluid to build up again – potentially making your symptoms the same or worse than before[1].   

What should you do if you take too much bumetanide?

Taking too much bumetanide can cause symptoms like dehydration, low blood pressure, and an electrolyte imbalance. If you think you have taken too much, it’s best to get immediate medical attention by calling 999 or going to A&E[1]. 

What should you do if you forget a dose of bumetanide?

You can take a missed dose of bumetanide if you remember shortly after it was due. But if your next dose is almost due, skip the missed one and take that instead. Don’t take two doses at once to make up for missing one[1]. 

What medicines should you avoid while taking bumetanide?

Bumetanide can interact with several medicines, including[1]: 

• Mental health medicines like lithium, amisulpride, pimozide, or risperidone 

• Non-steroidal anti-inflammatory drugs (NSAIDs), such as ibuprofen, diclofenac, or naproxen 

• Steroids or other diuretics 

• Blood pressure medicines 

• Medicines that treat or may give you an irregular heartbeat like digoxin, sotalol, flecainide, disopyramide, or amiodarone 

• Some antibiotics or painkillers that contain a lot of sodium like soluble paracetamol or co-codamol 

• Potassium supplements 

• Herbal remedies for heartburn or indigestion 

Always inform your doctor or pharmacist about all medications and supplements you take before you start a new medicine, and follow the instructions in the Patient Information Leaflet[2]. 

What are the side effects of bumetanide?

Increased urination, thirst, confusion, dizziness or light-headedness, headache, muscle cramps, and low levels of potassium or sodium are all fairly common side effects of bumetanide. However, they are usually mild[1]. 

More serious side effects include ear ringing, loss of hearing, unexplained bleeding or bruising, mouth ulcers, a high temperature, an irregular heartbeat, more severe dehydration, and confusion or fainting[1]. 

You should contact your GP if you experience any of these symptoms. In rare cases, the medicine may cause a serious allergic reaction (anaphylaxis). You should call 999 or visit A&E immediately if you believe this is happening[1]. 

Symptoms of anaphylaxis include[1]:  

• Difficulty breathing  

• Tightness in throat and chest  

• Swelling of the tongue or throat  

• Feeling faint or dizzy  

• Blue/grey skin or lips  

• Loss of consciousness 

If you experience any side effects, including those not listed, you are encouraged to report them via the Yellow Card Scheme or contact your doctor, pharmacist, or nurse. This information is intended as a summary for general awareness and does not replace professional medical advice. 

The information provided in the side effects section is not a comprehensive list of all possible side effects associated with this medication. For a complete list of side effects, please refer to the Patient Information Leaflet (PIL) provided with your medication or consult your healthcare professional[2]. 

Frequently asked questions about bumetanide

How quickly does bumetanide work? 

Bumetanide usually starts working within one hour of taking it – if you are not seeing it work you can contact your doctor or pharmacist[1]. 

Can I drink alcohol while taking bumetanide? 

It is best to limit alcohol while you’re also taking bumetanide, as it can increase the risk of dizziness and other side effects[1]. 

Will I need regular blood tests while taking bumetanide? 

Yes, regular blood tests are needed when you take bumetanide. Your doctor or pharmacist will wish to monitor your kidney function and electrolyte levels to make sure everything is working properly[1]. 

Can I take bumetanide long term? 

Some people take bumetanide long term, but only under regular medical supervision. In other cases, it may be used in the short to medium term[1]. 

Does bumetanide cause weight loss? 

Bumetanide can lead to weight loss by removing excess fluid – this is not the same as fat loss. If you notice sharp or worrying weight loss while taking bumetanide, speak to a medical professional[1]. 

Can I take bumetanide during pregnancy? 

You should only take bumetanide during pregnancy if your doctor decides it is absolutely necessary. In most cases, it is not prescribed during pregnancy[1]. 

Can I drive while taking bumetanide? 

If you feel dizzy or light-headed after taking bumetanide, don’t drive. Exercise safety at all times[1]. 

For the official NHS guide to bumetanide, visit their website.