Vardenafil and Naproxen: Can You Take Them Together?
Learn about the interaction, what your prescriber checks, and practical safety advice from UK pharmacists.
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Vardenafil and Naproxen: Understanding the Interaction
Published: 2 November 2026
Many men wonder whether vardenafil and naproxen can be taken together safely. The good news is that no major direct interaction is commonly reported between vardenafil (a PDE5 inhibitor used for erectile dysfunction) and naproxen (a non-steroidal anti-inflammatory drug or NSAID used for pain and inflammation). However, your prescriber will still check your full medical history and current medicines during your consultation to ensure both are suitable for you.
Key takeaways
- No major direct interaction is commonly reported between vardenafil and naproxen
- Your prescriber checks your heart health, blood pressure, and all current medicines
- Never take vardenafil with nitrates, nicorandil, riociguat, or poppers
- Take vardenafil 25 to 60 minutes before sex and naproxen with food as directed
- Seek urgent help for chest pain during sex or an erection lasting over 4 hours
What Is Vardenafil and How Does It Work?
Vardenafil is a prescription medicine licensed in the UK for treating erectile dysfunction (ED). It belongs to a group of medicines called PDE5 inhibitors, which also includes sildenafil (Viagra) and tadalafil (Cialis) [3][5]. Vardenafil works by relaxing the blood vessels in the penis, allowing more blood to flow in when you are sexually aroused. This helps you get and keep an erection suitable for sexual activity.
Vardenafil is available in 5 mg, 10 mg, and 20 mg tablets. You usually take it about 25 to 60 minutes before sexual activity, and it works only when you are sexually stimulated [5]. The effect can last for several hours, but you should not take it more than once a day. Like all PDE5 inhibitors, vardenafil requires a prescription and is only supplied after an online or face-to-face consultation reviewed by a UK prescriber.
What Is Naproxen and What Is It Used For?
Naproxen is a non-steroidal anti-inflammatory drug (NSAID) commonly used to relieve pain, reduce inflammation, and lower fever. It is prescribed for conditions such as arthritis, muscle and joint pain, period pain, gout, and headaches. Naproxen works by blocking the production of certain chemicals in the body (prostaglandins) that cause inflammation and pain.
Naproxen is available in various strengths, both on prescription and over the counter at lower doses. It is usually taken with or after food to reduce the risk of stomach upset. Like all NSAIDs, naproxen can have side effects, particularly on the stomach, heart, and kidneys, especially when used long-term or at high doses. Your doctor or pharmacist will consider your overall health and other medicines before recommending naproxen.
Common Uses of Naproxen
Naproxen is widely used for osteoarthritis, rheumatoid arthritis, ankylosing spondylitis, acute gout, and musculoskeletal pain. It is also effective for period pain (dysmenorrhoea) and post-operative pain. Because it reduces inflammation as well as pain, it is often preferred over simple painkillers like paracetamol for inflammatory conditions.
At a glance
Do Vardenafil and Naproxen Interact?
No major direct interaction is commonly reported between vardenafil and naproxen. They work through different mechanisms in the body: vardenafil affects blood flow to the penis by inhibiting the PDE5 enzyme, while naproxen blocks prostaglandin production to reduce pain and inflammation. Neither medicine is known to significantly alter the blood levels or effectiveness of the other.
However, both medicines can have effects on your cardiovascular system. Vardenafil, like all PDE5 inhibitors, can lower blood pressure slightly, and naproxen (like other NSAIDs) may increase blood pressure or affect kidney function in some people, particularly with long-term use. Your prescriber will review your blood pressure, heart health, and kidney function during your consultation to ensure both medicines are safe for you to use together.
Why Your Prescriber Still Checks
Even though no major interaction is expected, your prescriber will ask about all your current medicines, including over-the-counter painkillers like naproxen. This is because your overall health picture matters: for example, if you have heart disease, high blood pressure, or kidney problems, the combination of medicines needs careful consideration. The consultation ensures that vardenafil is safe and suitable for you specifically.
What Your Prescriber Checks Before Prescribing Vardenafil and Naproxen
During your consultation, the prescriber will ask about your cardiovascular health, including any history of heart attack, stroke, angina, or heart failure. They will also check your blood pressure and ask about medicines you take for high blood pressure, as vardenafil can add to the blood-pressure-lowering effect [5]. If you take naproxen regularly, they will want to know why, how long you have been taking it, and whether you have any kidney or stomach problems.
The prescriber will also check for any medicines that must never be taken with vardenafil. These include nitrates (such as GTN spray or isosorbide mononitrate), nicorandil, riociguat, and recreational drugs called poppers (amyl or alkyl nitrites). Taking vardenafil with any of these can cause a dangerous drop in blood pressure [5]. You must also not take vardenafil with another PDE5 inhibitor (such as sildenafil or tadalafil) at the same time.
Always Declare All Medicines
Even over-the-counter painkillers like naproxen must be declared during your consultation. Your prescriber checks every medicine to ensure vardenafil is safe and suitable for you specifically.
Practical Advice for Taking Vardenafil and Naproxen Together
If you have been prescribed both vardenafil and naproxen, take each medicine exactly as directed. Vardenafil should be taken about 25 to 60 minutes before you plan to have sex, and only when you anticipate sexual activity [5]. Naproxen is usually taken with or after food to protect your stomach, and you should follow the dosing schedule your doctor has recommended for your pain or inflammation.
Avoid drinking large amounts of alcohol when taking vardenafil, as alcohol can make erectile dysfunction worse and add to the blood-pressure-lowering effect, increasing the risk of dizziness or fainting. If you experience dizziness, headache, or flushing after taking vardenafil, sit or lie down until you feel better. If you develop chest pain during sex, stop immediately and seek urgent medical help. Do not take a nitrate medicine (such as GTN spray) if you have used vardenafil in the past 24 hours.
When to Speak to Your Doctor or Pharmacist
Contact your doctor or pharmacist if you experience new or worsening side effects from either medicine, such as severe stomach pain, black or bloody stools (which can be a sign of stomach bleeding from naproxen), or persistent headache or visual disturbances. If vardenafil does not work for you, do not increase the dose yourself; speak to your prescriber, who may adjust the dose or suggest a different treatment.
Other Medicines and Conditions That Affect Vardenafil Safety
Vardenafil is not suitable for everyone. It should not be used if you have been advised to avoid sexual activity due to severe heart problems, if you have very low blood pressure, or if you have had a recent heart attack or stroke [5]. It is also not recommended if you have a history of non-arteritic anterior ischaemic optic neuropathy (NAION), a rare condition causing sudden vision loss, or certain inherited retinal disorders.
Some medicines can raise the level of vardenafil in your blood, increasing the risk of side effects. These include potent CYP3A4 inhibitors such as ritonavir, cobicistat (found in some HIV medicines and in Paxlovid), ketoconazole, itraconazole, and clarithromycin. Vardenafil is contraindicated or requires dose adjustment with these medicines, so your prescriber must check your full medication list [5]. Alpha-blockers (such as tamsulosin or doxazosin, used for prostate problems or high blood pressure) can also interact with vardenafil, causing dizziness or low blood pressure; you should be stable on the alpha-blocker and start vardenafil at the lowest dose.
If you are taking any other medicine not listed here, do not assume it is safe to combine with vardenafil. Always declare every medicine, supplement, and herbal product during your consultation. Your prescriber or pharmacist will check for interactions and advise you accordingly. Never stop or change a prescribed medicine without professional advice.
When to get urgent help
- Chest pain during or after sex (do not take nitrates if you have used vardenafil in the past 24 hours)
- An erection lasting more than 4 hours (priapism)
- Sudden loss of vision in one or both eyes
- Sudden decrease or loss of hearing, possibly with ringing in the ears or dizziness
- Severe allergic reaction (swelling of face, lips, tongue, or throat, difficulty breathing)
Call 999 or go to A&E in an emergency, or contact NHS 111 for urgent advice.
Scientific References
- NHS. (n.d.). Erectile dysfunction (impotence). NHS website. https://www.nhs.uk/conditions/erection-problems-erectile-dysfunction/ [accessed 2 November 2026]
- Joint Formulary Committee. (n.d.). Sildenafil. British National Formulary. NICE. https://bnf.nice.org.uk/drugs/sildenafil/ [accessed 2 November 2026]
- Joint Formulary Committee. (n.d.). Vardenafil. British National Formulary. NICE. https://bnf.nice.org.uk/drugs/vardenafil/ [accessed 2 November 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.
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Can I take vardenafil and naproxen on the same day?
Yes, you can usually take vardenafil and naproxen on the same day. No major direct interaction is commonly reported between them, but your prescriber will check your overall health and other medicines to ensure both are safe for you.
Will naproxen make vardenafil less effective?
No, naproxen is not known to reduce the effectiveness of vardenafil. They work through different mechanisms and do not significantly alter each other's blood levels or action.
Can naproxen cause erectile dysfunction?
There is no strong evidence that naproxen directly causes erectile dysfunction. However, if you have new or worsening ED, it is important to see your GP, as ED can be an early sign of heart disease or diabetes.
What should I avoid when taking vardenafil?
Do not take vardenafil with nitrates, nicorandil, riociguat, poppers, or another PDE5 inhibitor, as this can cause a dangerous drop in blood pressure. Avoid heavy alcohol and grapefruit juice, and always declare all your medicines during your consultation.
How long does vardenafil last?
Vardenafil can help you get an erection for several hours after taking it, but you should not take it more than once a day. It works only when you are sexually stimulated.
Can I buy vardenafil over the counter?
No, vardenafil is a prescription-only medicine in the UK. It is only supplied after a consultation reviewed by a UK-registered prescriber, either online or face-to-face.
What are the common side effects of vardenafil?
Common side effects include headache, flushing, stuffy or runny nose, indigestion, and dizziness. If you experience chest pain during sex, an erection lasting more than 4 hours, or sudden vision or hearing loss, seek urgent medical help.
Is it safe to take vardenafil if I have high blood pressure?
Vardenafil may be suitable if your blood pressure is well controlled, but your prescriber must check your cardiovascular health and current medicines. If you take certain blood-pressure medicines (especially alpha-blockers), dose adjustments or extra monitoring may be needed.
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