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Bendroflumethiazide Side Effects

Bendroflumethiazide is a prescription medication, which is prescribed to patients with high blood pressure in order to limit the risks of complications. Sometimes it can be used to treat symptoms of heart failure as it releases the pressure on the arteries. It belongs to a group of medications known as thiazide diuretics, which remove the salt and water from the blood, alleviating pressure on the blood vessels and making it easier for the blood to circulate as it is more highly oxygenated.

Although Bendroflumethiazide is clinically proven to be a very safe treatment, there is a slight risk – as with all prescription medication – that some patients may experience side effects when taking it.

Use the interactive map below to highlight the areas of the body most at risk of side effects. It's worth noting that side effects of long-term medication do tend to subside after time, once your body gets used to the medication.


It is possible that you may experience some dizziness or light-headedness after taking this medication. This is due to the drop in blood pressure, especially when moving quickly and when getting up whilst lying or sitting down. To avoid this, take care in your movements and visit your doctor if this is severe and persists over the first few months.


It is fairly common to experience mild stomach upsets such as nausea, abdominal pain and vomiting, which may be accompanied by constipation or diarrhoea. You also find that you need to urinate more often.


Though rare, it is possible that you may experience a drop in blood pressure as a result of this medication. A decrease in levels of potassium and sodium may also occur. Levels of cholesterol, calcium, glucose and uric acid may rise.


Mild muscle cramp or weakness may occur after taking Bendroflumethiazide as a result in the drop in blood pressure and other changes in the blood as mentioned.

Bendroflumethiazide side effects

Click on the relevant area of the body to find out about how it may be affected by Bendroflumethiazide

Allergic reactions to Bendroflumethiazide

In some extremely rare cases, patients will suffer from an allergic reaction whilst taking Bendroflumethiazide, due to a hypersensitivity to thiazides or any of the other ingredients. Some of the symptoms you may suffer from due to an allergic reaction include:

  • Rashes
  • Flaky or peeling skin
  • Light sensitivity
  • Viral lung infection (pneumonitis)
  • Pulmonary oedema

Bendroflumethiazide side effects that affect your blood

If you are taking a thiazide diuretic it is important to have your blood monitored regularly. Your doctor will schedule tests for you in order to ensure you are not having a negative reaction to Bendroflumethiazide. One of the main things they will test for is an altered number or types of blood cells. You should contact your doctor for a blood analysis if you suffer from any of the following symptoms:

  • Increased bruising
  • Nose bleeds
  • Sore throat
  • Infections
  • Excessive tiredness or fatigue
  • Breathlessness
  • Pale skin

What causes the Bendroflumethiazide side effects?

Bendroflumethiazide is a thiazide diuretic that works by reducing the amount of water in the blood, causing the patient to urinate more regularly. This works because it increases the levels of minerals and salts (namely potassium), which causes the excess water in the blood to be drawn out and transferred to the kidneys, where it is passed as urine. By decreasing the volume of liquid in the blood, it becomes easier for it to flow through the arteries, lowering the pressure on the blood vessels.

By altering the levels of potassium and other minerals in the body, Bendroflumethiazide can cause adverse reactions, specifically in people who suffer from other medical conditions or are taking other medication in conjunction with Bendroflumethiazide. Otherwise, this medication has been proven by UK qualified doctors to be completely safe and highly effective. It is important to mention in your consultation any other relevant medical information.

swallow medication Arrow blood and water Arrow kidney Arrow blood vessel
Medication increases potassium levels Potassium draws water out of the blood Excess liquid flows to the kidneys where it is passed in urine Healthier blood vessels lower pressure on the heart

High blood pressure does affect a surprising amount of people, and its symptoms can be confused with other conditions or remain unnoticed for some time. It's important to understand the symptoms of high blood pressure so you can prepare for treatment and any side effects.

Preventing side effects of Bendroflumethiazide

To make the most out of this treatment, it is important to be aware of steps that can be taken to prevent the risk of side effects. As this is a long term medication, it is essential to make sure the used of these high blood pressure tablets to not affect your health adversely in the long run. Steps that can be take to prevent or lower the risk of side effects include:

  • Caution should be taken before use in those with diabetes mellitus as it can raise blood glucose levels
  • Make your doctor aware of any other medication you are taking such as antifungals, antiarrhythmics, antipsychotics or corticosteroids which may increase the risk of hypokalaemia (low potassium levels)
  • Limit the amount of alcohol consumed as this may reduce blood pressure even further, increasing the risk of various associated side effects
  • Always remain well hydrated and limit exertion in very hot weather

It is also recommended to have regular check ups with your doctor to ensure your blood pressure is being controlled effectively by the medication. Caution should be taken by those that are pregnant and breastfeeding (as the medication can pass through the breast milk to the newborn).

The below are a list of medication that can interact adversely with Bendroflumethiazide, it is important to make your doctor aware if you are using any of these.

  • Blood thinners such as warfarin
  • Insulin or anti-diabetic medication
  • Diazoxide
  • Pimozide
  • Thioridazine
  • Calcium channel blockers
  • Digoxin
  • Lithium

Although the list is not complete, it is always advised to make your doctor aware of any changes to other medicines you may be using, to ensure the suitability of continued use of Bendroflumethiazide.

What to do if Bendroflumethiazide side effects occur

If you experience any of the side effects listed on this page or on your patient information leaflet normally provided with the medication, you should consult your doctor as it may mean that Bendroflumethiazide is not the most appropriate treatment for you. Also, inform a medical professional if you think that you are suffering from any side effects not listed.

Buy Bendroflumethiazide online at euroClinix

Overall, the chances of experiencing side effects of any medication, including Bendroflumethiazide, are low. However, if you find they persist or are particularly troublesome, do visit your GP. To buy Bendroflumethiazide online, you can complete a free consultation at euroClinix. This will take approximately 5 minutes and is reviewed by a certified UK doctor.

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