Tadalafil and Nebivolol: Can They Be Taken Together?

Tadalafil and Nebivolol: Understanding the Interaction

Published: 23 October 2026

Many men taking nebivolol for high blood pressure or heart conditions wonder whether tadalafil and nebivolol can be taken together safely. The good news is that tadalafil (Cialis) can usually be prescribed alongside nebivolol, a beta-blocker, but your prescriber will need to check your blood pressure, heart health, and overall medication list to ensure the combination is appropriate for you [3][4]. This page explains how these two medicines interact, what safety checks are carried out, and the practical steps you can take to use them safely.

What Are Tadalafil and Nebivolol?

Tadalafil is a phosphodiesterase type 5 (PDE5) inhibitor licensed in the UK to treat erectile dysfunction (ED). It works by relaxing blood vessels in the penis, allowing increased blood flow when you are sexually aroused [4]. Tadalafil is available as on-demand tablets (10 mg or 20 mg, taken at least 30 minutes before sex, with effects lasting up to 36 hours) or as a daily low-dose tablet (2.5 mg or 5 mg) for men who prefer spontaneity [4]. It requires sexual stimulation to work and does not cause an automatic erection.

Nebivolol is a beta-blocker prescribed to treat high blood pressure (hypertension) and sometimes heart failure. It works by slowing the heart rate and reducing the force of heart contractions, which lowers blood pressure and reduces the heart's workload [12]. Nebivolol is taken once daily, usually in the morning, and is considered a cardioselective beta-blocker, meaning it primarily affects the heart rather than other parts of the body. Like all beta-blockers, it can occasionally contribute to erectile difficulties in some men, though nebivolol is thought to have a lower risk of this side effect compared to older beta-blockers.

Both medicines affect the cardiovascular system, so understanding how they interact is essential before combining them. Your prescriber will assess whether your heart and blood pressure are stable enough for sexual activity and whether the combination is safe for you.

How Do Tadalafil and Nebivolol Interact?

Tadalafil and nebivolol can both lower blood pressure, so taking them together may increase the risk of dizziness, light-headedness, or fainting, particularly when standing up quickly [3][4]. This is because tadalafil relaxes blood vessels throughout the body (not just in the penis), which can add to the blood-pressure-lowering effect of nebivolol. However, this interaction is usually manageable and does not mean the combination is unsafe for everyone.

The key difference between nebivolol and some other blood-pressure medicines is that beta-blockers do not interact with tadalafil through the same dangerous mechanism as nitrates or nicorandil. Nitrates and nicorandil are absolutely contraindicated with all PDE5 inhibitors because the combination can cause a severe, potentially life-threatening drop in blood pressure [3][4]. Nebivolol does not carry this absolute contraindication, but caution is still needed.

Your prescriber will check your current blood pressure readings, how well controlled your hypertension is, and whether you experience any symptoms such as dizziness or fatigue on nebivolol. If your blood pressure is stable and you do not have other high-risk cardiovascular conditions, tadalafil is often considered safe to use. The prescriber may recommend starting with a lower dose of tadalafil (such as 10 mg on-demand or 2.5 mg daily) to minimise the risk of blood pressure changes.

Why Beta-Blockers Are Different from Nitrates

It is important to understand that nebivolol is not a nitrate. Nitrates (such as GTN spray, isosorbide mononitrate, or isosorbide dinitrate) and related medicines like nicorandil work by releasing nitric oxide, which powerfully relaxes blood vessels. When combined with a PDE5 inhibitor like tadalafil, this can cause a dangerous and uncontrolled fall in blood pressure [3][4]. For this reason, you must never take tadalafil with nitrates, nicorandil, riociguat, or recreational drugs called poppers (amyl or alkyl nitrites).

Nebivolol works through a completely different mechanism—by blocking beta receptors in the heart—so it does not cause the same dangerous interaction. However, because both medicines can lower blood pressure through different pathways, your prescriber will still need to assess your individual risk and ensure the combination is appropriate for you.

What Your Prescriber Will Check Before Prescribing Tadalafil with Nebivolol

When you request tadalafil through an online consultation at Cured Pharmacy, the UK-registered prescriber will review your full medical history and current medications, including nebivolol. They will check your blood pressure readings, ask about any symptoms of low blood pressure (such as dizziness, fainting, or feeling weak), and confirm that your cardiovascular health is stable [2][4].

The prescriber will also ask whether you are taking any other medicines that could interact with tadalafil, including alpha-blockers (such as doxazosin or tamsulosin), other blood-pressure medicines, or drugs that affect how tadalafil is broken down in the body (such as certain antibiotics or antifungals). If you take multiple blood-pressure medicines, the cumulative effect on blood pressure will be carefully considered.

Sexual activity itself places demands on the heart, so the prescriber will assess whether your heart is healthy enough for sex. If you have had a recent heart attack or stroke, suffer from unstable angina, or have severe heart failure, tadalafil may not be suitable [4]. The prescriber will also check for other conditions that could make tadalafil unsafe, such as very low blood pressure (hypotension), previous sudden vision loss (non-arteritic anterior ischaemic optic neuropathy, or NAION), or certain inherited eye conditions.

If the prescriber determines that tadalafil is safe for you, they may recommend starting with a lower dose and monitoring how you respond. You should never adjust the dose of nebivolol or tadalafil without consulting a healthcare professional.

Practical Advice for Taking Tadalafil and Nebivolol Together

If your prescriber approves the combination of tadalafil and nebivolol, there are several practical steps you can take to use them safely. First, take nebivolol exactly as prescribed by your GP—usually once daily at the same time each day. Do not stop or change your nebivolol dose without medical advice, as stopping beta-blockers suddenly can cause a rebound increase in blood pressure or heart rate.

When taking tadalafil, follow the dosing instructions carefully. For on-demand use, take 10 mg or 20 mg at least 30 minutes before sexual activity, with effects lasting up to 36 hours. For daily use, take 2.5 mg or 5 mg at the same time each day, regardless of when you plan to have sex [4]. Do not take more than one dose of tadalafil in 24 hours, and do not combine tadalafil with another PDE5 inhibitor (such as sildenafil or vardenafil).

Be mindful of activities that could make low blood pressure worse. Avoid standing up too quickly, especially after lying down or sitting for a long time, as this can cause dizziness. Limit alcohol intake, as heavy drinking can worsen erectile dysfunction and add to the blood-pressure-lowering effects of both medicines [1][4]. Grapefruit juice can increase tadalafil levels in the blood, so it is best to avoid it or discuss it with your pharmacist.

Monitor how you feel after taking tadalafil for the first time. If you experience significant dizziness, light-headedness, fainting, or chest pain, stop taking tadalafil and seek medical advice. If you develop an erection lasting more than four hours (priapism), sudden loss of vision or hearing, or chest pain during sex, seek urgent medical help immediately [4].

When to Contact Your GP or Pharmacist

If you notice any new symptoms after starting tadalafil, such as persistent dizziness, unusual fatigue, shortness of breath, or swelling in your legs, contact your GP. These could be signs that your blood pressure is too low or that your heart condition needs review. Your GP may want to check your blood pressure or adjust your nebivolol dose.

If you are prescribed a new medicine by another doctor or buy an over-the-counter remedy, always check with your pharmacist whether it is safe to take with tadalafil and nebivolol. Some medicines, such as certain antibiotics, antifungals, or treatments for HIV, can increase tadalafil levels and raise the risk of side effects [4]. Your pharmacist can advise you on timing, dose adjustments, or whether an alternative treatment is needed.

Can Nebivolol Cause Erectile Dysfunction?

Beta-blockers, including nebivolol, are sometimes associated with erectile dysfunction, though the evidence is mixed and the risk varies between individuals [1][10]. Older beta-blockers (such as atenolol or propranolol) were more commonly linked to ED, possibly because they can reduce blood flow to the penis or affect the nervous system pathways involved in erections. Nebivolol is a newer, more selective beta-blocker and is thought to have a lower risk of causing ED compared to older agents.

However, high blood pressure itself is a significant risk factor for erectile dysfunction, as it damages blood vessels and reduces blood flow throughout the body, including to the penis [1][10]. Treating high blood pressure with nebivolol can actually improve overall cardiovascular health and, in some cases, may indirectly help erectile function by protecting blood vessels. If you believe nebivolol is contributing to ED, do not stop taking it without consulting your GP, as uncontrolled high blood pressure poses serious health risks.

If you develop new or worsening erectile difficulties after starting nebivolol, speak to your GP. They may consider switching you to a different blood-pressure medicine or adding a treatment for ED, such as tadalafil. Many men successfully manage both high blood pressure and erectile dysfunction with the right combination of medicines and lifestyle changes [2].

Other Medicines and Lifestyle Factors to Consider with Tadalafil and Nebivolol

In addition to nebivolol, you should tell your prescriber about all other medicines you take, including over-the-counter products, herbal remedies, and supplements. Alpha-blockers (such as doxazosin, tamsulosin, or alfuzosin, often used for prostate symptoms) can interact with tadalafil and increase the risk of low blood pressure [3][4]. If you take an alpha-blocker, your prescriber will ensure you are stable on it and may start you on the lowest dose of tadalafil.

Certain medicines can increase tadalafil levels in the blood by slowing its breakdown. These include potent CYP3A4 inhibitors such as ritonavir, cobicistat (used in HIV treatment), ketoconazole or itraconazole (antifungals), and clarithromycin (an antibiotic). If you take any of these, your prescriber may reduce the maximum dose of tadalafil or advise against using it [4]. Conversely, medicines that speed up tadalafil breakdown (such as rifampicin, carbamazepine, phenytoin, or St John's wort) can make it less effective.

Lifestyle factors also play an important role in both blood pressure control and erectile function. Smoking damages blood vessels and worsens ED, so quitting smoking is one of the most effective steps you can take [1]. Regular physical activity, a healthy diet, maintaining a healthy weight, and managing stress can all improve cardiovascular health and erectile function [1][2]. Reducing alcohol intake and avoiding recreational drugs (especially poppers, which are extremely dangerous with tadalafil) are also essential.

If you have diabetes, high cholesterol, or other cardiovascular risk factors, managing these conditions well will support both your heart health and your sexual health. Your GP can provide advice and support tailored to your individual circumstances.

What If Tadalafil Does Not Work for You?

If tadalafil does not improve your erections, or if you experience side effects, speak to your prescriber. They may suggest trying a different dose, switching to another PDE5 inhibitor (such as sildenafil, vardenafil, or avanafil), or exploring other treatment options [2]. Some men respond better to one PDE5 inhibitor than another, and it can take a few attempts to find the right medicine and dose for you.

If oral treatments are not effective or suitable, other options include vacuum erection devices, alprostadil (a medicine inserted into the urethra or injected into the penis), or referral to a specialist for further assessment [2][7]. Psychological factors, such as anxiety or relationship difficulties, can also contribute to ED, and counselling or sex therapy may be helpful alongside medical treatment [1][2].

Scientific References

1. NHS. (n.d.). Erectile dysfunction (impotence). NHS website. https://www.nhs.uk/conditions/erection-problems-erectile-dysfunction/ [accessed 23 October 2026]
2. National Institute for Health and Care Excellence. (n.d.). Erectile dysfunction. Clinical Knowledge Summaries. https://cks.nice.org.uk/topics/erectile-dysfunction/ [accessed 23 October 2026]
3. Joint Formulary Committee. (n.d.). Sildenafil. British National Formulary. NICE. https://bnf.nice.org.uk/drugs/sildenafil/ [accessed 23 October 2026]
4. Joint Formulary Committee. (n.d.). Tadalafil. British National Formulary. NICE. https://bnf.nice.org.uk/drugs/tadalafil/ [accessed 23 October 2026]
5. Feldman, H. A., Goldstein, I., Hatzichristou, D. G., Krane, R. J., & McKinlay, J. B. (1994). Impotence and its medical and psychosocial correlates: Results of the Massachusetts Male Aging Study. Journal of Urology, 151(1), 54–61. https://pubmed.ncbi.nlm.nih.gov/8254833/ [accessed 23 October 2026]
6. Electronic Medicines Compendium. (n.d.). Summaries of Product Characteristics and Patient Information Leaflets. https://www.medicines.org.uk/emc/ [accessed 23 October 2026]

Information on this page is for educational purposes only and is not medical advice. Prescription treatments require clinical assessment by a UK-registered prescriber. Always consult a qualified healthcare professional before starting or changing any medication.