Vardenafil and Cefuroxime: Can You Take Them Together?

Takes less than 2 minutes to complete 100% online

Vardenafil and Cefuroxime: Understanding the Interaction

Published: 28 October 2026

If you've been prescribed vardenafil and cefuroxime, you may wonder whether it's safe to take them together. The good news is that no major interaction is commonly reported between vardenafil (generic Levitra) and cefuroxime, a widely used antibiotic. However, your prescriber or pharmacist will still check your full medication list during your consultation to ensure the combination is appropriate for you, and you should always declare every medicine you're taking, including antibiotics.

What Is Vardenafil and How Does It Work?

Vardenafil is a prescription medicine used to treat erectile dysfunction (ED) in men. It belongs to a group of medicines called PDE5 inhibitors, which work by relaxing blood vessels in the penis, allowing more blood to flow in when you're sexually aroused [5]. This increased blood flow can help you achieve and maintain an erection suitable for sexual activity.

Vardenafil is available in 5mg, 10mg, and 20mg tablets and is usually taken about 25 to 60 minutes before sexual activity. The effect can last for several hours, but you'll only get an erection when you're sexually stimulated—vardenafil doesn't work automatically [5]. It's important to take vardenafil no more than once a day, and it should only be used after a consultation with a UK-registered prescriber who will check your medical history and current medicines.

Common side effects include headache, flushing, indigestion, and nasal congestion. Vardenafil is not suitable for everyone, particularly men with severe heart or liver problems, very low blood pressure, or those taking certain other medicines such as nitrates [5].

What Is Cefuroxime and When Is It Prescribed?

Cefuroxime is an antibiotic that belongs to the cephalosporin family. It's used to treat a wide range of bacterial infections, including chest infections (such as pneumonia and bronchitis), urinary tract infections, skin and soft tissue infections, and Lyme disease. Cefuroxime works by killing bacteria or stopping them from multiplying, helping your body's immune system to clear the infection.

Cefuroxime is available as tablets (usually 250mg or 500mg) or as an injection given in hospital. The usual course lasts between five and ten days, depending on the type and severity of the infection. It's important to complete the full course even if you start to feel better, as stopping early can allow the infection to return or contribute to antibiotic resistance.

Like all antibiotics, cefuroxime can cause side effects in some people, including diarrhoea, nausea, headache, and occasionally allergic reactions. If you've ever had an allergic reaction to penicillin or other cephalosporin antibiotics, tell your doctor or pharmacist before taking cefuroxime.

Why You Might Be Taking Both Medicines

It's not uncommon for men to need treatment for both an infection and erectile dysfunction at the same time. For example, you might be taking cefuroxime for a chest or urinary infection while also using vardenafil for ED. The two conditions are unrelated, and treating one doesn't affect the need to treat the other. Your prescriber will consider your overall health and all your medicines when deciding whether vardenafil is safe and appropriate for you.

Vardenafil and Cefuroxime: Is There an Interaction?

No major interaction is commonly reported between vardenafil and cefuroxime. Cefuroxime is not known to significantly affect the way vardenafil is broken down in the body, and vardenafil does not interfere with the antibiotic action of cefuroxime. This means that, in most cases, the two medicines can be taken together without requiring dose adjustments or special precautions beyond those that apply to each medicine individually.

However, it's essential to remember that every person's situation is different. Your prescriber or pharmacist will review your full medical history, including all current medicines, supplements, and over-the-counter products, during your consultation. This check ensures that no other medicines you're taking could interact with vardenafil or cefuroxime, and that both treatments are safe for you.

Even though no major interaction exists between these two medicines, you should never assume that any combination is safe without professional advice. Always declare every medicine you're taking—including antibiotics, vitamins, herbal remedies, and medicines bought without a prescription—when you request ED treatment.

What Your Prescriber Checks Before Approving Vardenafil

When you request vardenafil through an online consultation at Cured Pharmacy, a UK-registered prescriber will review your answers to ensure the medicine is safe and suitable for you. They will check for conditions that make vardenafil unsuitable, such as recent heart attack or stroke, unstable angina, severe heart failure, very low blood pressure, or a history of sudden vision loss (NAION) [5].

The prescriber will also check for medicines that must not be taken with vardenafil. These include nitrates (such as GTN spray, isosorbide mononitrate, or isosorbide dinitrate), nicorandil, riociguat, and amyl or alkyl nitrites (poppers). Taking vardenafil with any of these can cause a dangerous drop in blood pressure [5]. You must never take vardenafil alongside another PDE5 inhibitor (such as sildenafil, tadalafil, or avanafil).

If you're taking medicines that can interact with vardenafil—such as alpha-blockers (for prostate or blood pressure), potent CYP3A4 inhibitors (including some HIV medicines, antifungals, or antibiotics like clarithromycin), or other blood-pressure medicines—the prescriber will decide whether vardenafil is appropriate and, if so, which dose is safest [5]. This is why it's vital to list every medicine you're taking, including cefuroxime or any other antibiotic.

Antibiotics That May Interact With Vardenafil

While cefuroxime does not interact with vardenafil, some other antibiotics do. Clarithromycin and erythromycin are potent inhibitors of the enzyme CYP3A4, which breaks down vardenafil in the body. Taking these antibiotics with vardenafil can raise vardenafil levels, increasing the risk of side effects. In fact, vardenafil is contraindicated (must not be used) with potent CYP3A4 inhibitors [5]. If you're prescribed one of these antibiotics, your prescriber will advise you to pause vardenafil or choose an alternative ED treatment.

Practical Advice: Taking Vardenafil and Cefuroxime Safely

If your prescriber has approved vardenafil and you're also taking cefuroxime, follow the instructions for each medicine carefully. Take vardenafil about 25 to 60 minutes before you plan to have sex, and take cefuroxime at the times prescribed by your doctor (usually twice a day with or after food). There's no need to separate the doses of the two medicines, as they don't interfere with each other.

Complete the full course of cefuroxime even if you feel better, as stopping early can allow the infection to return. If you experience side effects from either medicine—such as dizziness, headache, or stomach upset—these are usually mild and temporary. However, if you feel unwell or notice anything unusual, contact your GP or pharmacist for advice.

Avoid drinking large amounts of alcohol while taking vardenafil, as alcohol can make erectile dysfunction worse and increase the risk of dizziness or low blood pressure. Grapefruit juice can raise vardenafil levels in the blood and should be avoided. If you develop diarrhoea while taking cefuroxime, stay hydrated and speak to a pharmacist if it's severe or persistent.

When to Seek Medical Advice or Urgent Help

Most men tolerate vardenafil and cefuroxime well, but you should know the warning signs that require urgent attention. If you experience an erection lasting more than four hours (priapism), seek emergency help immediately, as this can cause permanent damage if not treated quickly [5]. Sudden loss of vision or hearing, chest pain during sex, or severe dizziness are also reasons to stop taking vardenafil and get urgent medical advice.

If you develop signs of an allergic reaction to cefuroxime—such as a rash, swelling of the face or throat, difficulty breathing, or severe diarrhoea (which can sometimes indicate a serious bowel infection called C. difficile)—contact your GP or call 111 straight away. Severe allergic reactions are rare but require immediate treatment.

Never stop or change a prescribed medicine without speaking to your doctor or pharmacist first. If you're unsure whether a symptom is related to vardenafil, cefuroxime, or another cause, seek professional advice. The team at Cured Pharmacy is available to answer questions about your treatment, and your GP or NHS 111 can provide urgent guidance if needed.

What to Tell Your Prescriber at Every Consultation

Always declare every medicine you're taking, including antibiotics like cefuroxime, when you request ED treatment. Mention over-the-counter medicines, vitamins, herbal supplements (especially St John's wort, which can reduce vardenafil's effectiveness), and any recreational substances. Be honest about your alcohol intake and any other health conditions, as this information helps the prescriber keep you safe. If your medicines change—for example, if you're prescribed a new antibiotic or your GP adjusts your blood-pressure treatment—update your online pharmacy or request a new consultation before ordering more vardenafil.

Scientific References

1. NHS. (n.d.). Erectile dysfunction (impotence). NHS website. https://www.nhs.uk/conditions/erection-problems-erectile-dysfunction/ [accessed 28 October 2026]
2. Joint Formulary Committee. (n.d.). Vardenafil. British National Formulary. NICE. https://bnf.nice.org.uk/drugs/vardenafil/ [accessed 28 October 2026]
3. Electronic Medicines Compendium. (n.d.). Summaries of Product Characteristics and Patient Information Leaflets. https://www.medicines.org.uk/emc/ [accessed 28 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.

Choose your treatment

Select from our recommended UK-licensed medications.

Answer quick questions

Select safe UK treatments. Quick answers.

Get it delivered fast

We will deliver direct to you as quickly as tomorrow.