Vardenafil and Bendroflumethiazide: Safe Together?

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What is vardenafil and bendroflumethiazide?

Vardenafil is a phosphodiesterase type 5 (PDE5) inhibitor licensed in the UK to treat erectile dysfunction. It is the generic version of Levitra and is available in 5mg, 10mg, and 20mg tablets. Vardenafil works by relaxing blood vessels in the penis, allowing increased blood flow when you are sexually aroused. It is typically taken about 25 to 60 minutes before sexual activity, and sexual stimulation is needed for it to work [5].

Bendroflumethiazide (sometimes spelled bendrofluazide) is a thiazide diuretic, commonly known as a 'water tablet'. It is prescribed to treat high blood pressure (hypertension) and fluid retention (oedema). Bendroflumethiazide works by helping your kidneys remove excess salt and water from your body, which lowers the volume of fluid in your blood vessels and reduces blood pressure [2].

Both medicines are prescription-only in the UK and should only be taken under the guidance of a qualified healthcare professional. If you are taking bendroflumethiazide for high blood pressure and are experiencing erectile dysfunction, it is important to discuss both conditions with your doctor or prescriber, as they can assess whether vardenafil is a suitable option for you.

How do vardenafil and bendroflumethiazide interact?

Vardenafil and bendroflumethiazide do not have a direct chemical interaction that makes them unsafe to take together. However, both medicines can lower blood pressure, and when taken in combination, this effect may be additive. This means that the combined blood-pressure-lowering effect could be greater than either medicine alone, which may increase the risk of dizziness, light-headedness, or fainting, particularly when standing up quickly [5].

In plain English, vardenafil relaxes blood vessels to help blood flow to the penis, which can also cause a mild drop in overall blood pressure. Bendroflumethiazide reduces blood pressure by removing excess fluid from the body. When both medicines are working at the same time, your blood pressure may drop more than expected, especially in the first few hours after taking vardenafil.

This interaction is usually manageable and does not mean the combination is unsafe for everyone. Your prescriber will review your current blood pressure control, the dose of bendroflumethiazide you are taking, and any other medicines you use. They may recommend starting vardenafil at a lower dose (such as 5mg) and monitoring how you respond before considering a higher dose if needed [5].

Why blood pressure matters with ED treatment

Erectile dysfunction is more common in men with high blood pressure, and some blood pressure medicines can contribute to ED as a side effect. Thiazide diuretics like bendroflumethiazide are less likely to cause ED than some other blood pressure tablets, but the condition itself and the underlying cardiovascular health are important factors. Treating ED with vardenafil can improve quality of life, but it must be done safely, which is why your prescriber will check that your blood pressure is well controlled and that you are not at risk of a dangerous drop in blood pressure when the two medicines are combined [2].

When to get urgent help

• Chest pain during or after sexual activity
• An erection lasting more than 4 hours (priapism)
• Sudden loss of vision or hearing
• Severe dizziness or fainting that does not improve when lying down
• Symptoms of a severe allergic reaction, such as swelling of the face, lips, or throat, or difficulty breathing

Call 999 or go to A&E in an emergency, or contact NHS 111 for urgent advice.

What does your prescriber check before prescribing vardenafil and bendroflumethiazide together?

Before prescribing vardenafil to someone taking bendroflumethiazide, a UK prescriber will carry out a thorough clinical assessment. This includes reviewing your full medical history, current medicines, blood pressure readings, and any cardiovascular conditions. They will check that your blood pressure is stable and well controlled on bendroflumethiazide, as poorly controlled high blood pressure or very low blood pressure can make vardenafil unsuitable [2][5].

Your prescriber will also ask about other medicines you are taking, including over-the-counter products and supplements. This is particularly important because vardenafil must never be taken with nitrates (such as GTN spray or isosorbide mononitrate), nicorandil, riociguat, or recreational drugs known as 'poppers' (amyl or alkyl nitrites), as these combinations can cause a dangerous drop in blood pressure. If you are taking an alpha-blocker for prostate symptoms or blood pressure (such as doxazosin or tamsulosin), your prescriber will take extra care, as this combination also carries a risk of low blood pressure [5].

The prescriber will assess whether sexual activity is safe for you, especially if you have a history of heart attack, stroke, unstable angina, or severe heart failure. They will also consider the dose of vardenafil that is appropriate for you. For men taking bendroflumethiazide, starting with the lowest effective dose (usually 5mg or 10mg) is common practice, with the option to adjust based on how well the medicine works and whether you experience any side effects [5].

Practical advice for taking vardenafil with bendroflumethiazide

If your prescriber has confirmed that vardenafil is suitable for you while taking bendroflumethiazide, there are some practical steps you can take to use the medicine safely. Take vardenafil about 25 to 60 minutes before you plan to have sex, and remember that sexual stimulation is needed for it to work. The medicine will not cause an automatic erection [5].

Be aware of the signs of low blood pressure, such as dizziness, light-headedness, or feeling faint, especially when you stand up quickly. If you experience these symptoms, sit or lie down until they pass, and mention them to your prescriber at your next review. Avoid drinking large amounts of alcohol when taking vardenafil, as alcohol can worsen erectile dysfunction and add to the blood-pressure-lowering effect, increasing the risk of dizziness [5].

Continue taking bendroflumethiazide exactly as prescribed by your doctor. Do not stop or change the dose of your blood pressure medicine without medical advice, even if you are starting vardenafil. If you are unsure about timing or have any concerns, speak to your prescriber or pharmacist. Keep all your medicines in their original packaging, and store them safely away from children.

What to do if you feel unwell

If you experience chest pain during or after sex, do not use more vardenafil and seek urgent medical help. If you develop a sudden loss of vision or hearing, stop taking vardenafil and contact a doctor immediately. An erection lasting more than four hours (priapism) is a medical emergency and requires urgent treatment to prevent permanent damage. These side effects are rare, but it is important to know the warning signs [5].

At a glance

Can other blood pressure medicines be taken with vardenafil and bendroflumethiazide?

Many men with high blood pressure take more than one medicine to keep their blood pressure under control. If you are taking bendroflumethiazide alongside other blood pressure tablets, such as ACE inhibitors (like ramipril), angiotensin receptor blockers (like losartan), calcium channel blockers (like amlodipine), or beta-blockers (like bisoprolol), your prescriber will assess the overall effect on your blood pressure before prescribing vardenafil [2][5].

The combination of multiple blood-pressure-lowering medicines with vardenafil can increase the risk of dizziness or fainting, but this does not mean vardenafil is automatically unsuitable. Your prescriber will consider your current blood pressure readings, how well your blood pressure is controlled, and whether you have experienced any symptoms of low blood pressure in the past. They may recommend starting with a lower dose of vardenafil and monitoring your response closely.

If you are taking an alpha-blocker such as doxazosin, tamsulosin, or alfuzosin (often prescribed for prostate symptoms), extra caution is needed. Alpha-blockers can cause a significant drop in blood pressure when combined with vardenafil, so your prescriber will ensure you are stable on the alpha-blocker before starting vardenafil at the lowest dose. Never take vardenafil if you are using nitrates, nicorandil, riociguat, or another PDE5 inhibitor, as these combinations are not safe [5].

Getting vardenafil and bendroflumethiazide safely from Cured Pharmacy

At Cured Pharmacy, vardenafil is available on prescription following an online consultation reviewed by a UK-registered prescriber. During the consultation, you will be asked about your current medicines, including bendroflumethiazide, your blood pressure control, and your overall health. This ensures that vardenafil is safe and appropriate for you. The prescriber will also check for any contraindications and assess whether the dose is suitable [5].

If vardenafil is not the best option for you, the prescriber may recommend an alternative PDE5 inhibitor, such as sildenafil (generic Viagra) or tadalafil (generic Cialis), which may be more suitable depending on your individual circumstances. All prescription ED medicines work in a similar way, but they differ in how quickly they work and how long they last. Your prescriber can explain the options and help you choose the most appropriate treatment [3][4][5].

Once your prescription is approved, your medicine will be dispensed by our GPhC-registered pharmacy and delivered discreetly to your door. If you have any questions about taking vardenafil with bendroflumethiazide, our pharmacist-led team is here to help. You should continue to see your GP regularly for blood pressure checks and to review your overall cardiovascular health, as erectile dysfunction can be an early sign of heart disease or diabetes [1][2].

Why choose Cured Pharmacy for ED treatment

Cured Pharmacy is a GPhC-registered online pharmacy (GPhC 9012511) offering convenient access to prescription ED treatments through a safe, confidential online consultation. Our UK-registered prescribers review every consultation individually, and our pharmacists are available to answer your questions. We offer a range of ED medicines, including vardenafil, at transparent prices, with discreet delivery and ongoing support to help you manage your condition safely and effectively.

In summary

• Vardenafil and bendroflumethiazide can usually be taken together safely if your blood pressure is well controlled.
• Both medicines can lower blood pressure, so your prescriber may start vardenafil at a lower dose.
• Never take vardenafil with nitrates, nicorandil, riociguat, or poppers, as this can cause dangerous low blood pressure.
• Report dizziness, chest pain, or sudden vision or hearing loss to a doctor immediately.
• Continue taking bendroflumethiazide as prescribed and do not stop without medical advice.

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