Vardenafil and Oxycodone: Can They Be Taken Together?

Vardenafil and Oxycodone: Understanding the Interaction

Published: 2 November 2026

If you're prescribed oxycodone for pain and considering vardenafil for erectile dysfunction, you may wonder whether vardenafil and oxycodone can be taken together safely. The good news is that no major direct interaction between these two medicines is commonly reported, but your prescriber will still need to review your full medical history and current medications during a consultation to ensure treatment is appropriate for you. This page explains what each medicine does, how they may affect each other, and the safety checks involved.

What is vardenafil and how does it work?

Vardenafil is a prescription medicine used to treat erectile dysfunction (ED) in adult men [5]. It belongs to a group of medicines called PDE5 inhibitors, which work by relaxing blood vessels in the penis, allowing increased blood flow when you are sexually aroused [5]. Vardenafil is the generic version of Levitra and is available in 5mg, 10mg, and 20mg tablets.

You typically take vardenafil 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 more than one dose in 24 hours. Common side effects include headache, flushing, nasal congestion, and indigestion [5]. Vardenafil is not suitable for everyone, particularly those taking nitrates, nicorandil, riociguat, or recreational drugs called 'poppers', as these combinations can cause a dangerous drop in blood pressure [5].

What is oxycodone and why is it prescribed?

Oxycodone is a strong opioid painkiller prescribed for moderate to severe pain that cannot be managed with other pain relief [12]. It works by binding to opioid receptors in the brain and spinal cord, changing how your body perceives and responds to pain. Oxycodone is available in immediate-release and modified-release (slow-release) formulations, and is often prescribed after surgery, for cancer pain, or for chronic pain conditions.

Because oxycodone is a controlled drug with a risk of dependence, it is prescribed only when necessary and usually for the shortest time possible. Common side effects include drowsiness, constipation, nausea, and dizziness [12]. Oxycodone can slow your breathing, especially when you first start taking it or if the dose is increased, so it must be used exactly as prescribed. It can also cause low blood pressure and make you feel lightheaded, particularly when standing up quickly.

How oxycodone affects your body

Oxycodone acts on the central nervous system to reduce pain signals, but it also affects other body systems. It can cause sedation, slow reflexes, and impair your ability to drive or operate machinery safely [12]. The medicine may also lower blood pressure and heart rate in some people, and can cause constipation by slowing movement through the digestive system. These effects are important to consider when taking other medicines, including those for erectile dysfunction.

Is there an interaction between vardenafil and oxycodone?

No major direct interaction between vardenafil and oxycodone is commonly reported in standard drug interaction databases. However, both medicines can lower blood pressure and cause dizziness, so there is a theoretical risk that taking them together might add to these effects [5][12]. This does not mean the combination is unsafe, but it does mean your prescriber needs to assess your individual circumstances carefully.

Oxycodone does not significantly affect the liver enzymes (CYP3A4) that break down vardenafil, so it is unlikely to change how vardenafil works in your body. Similarly, vardenafil does not interfere with how oxycodone is processed. The main consideration is the additive effect on blood pressure and the potential for increased dizziness or lightheadedness, particularly when you first start treatment or change doses.

During your consultation, the prescriber will review all your current medicines, including oxycodone, to check for any interactions and ensure vardenafil is safe for you. You should never stop or change your oxycodone dose without advice from the doctor who prescribed it, as sudden changes can cause withdrawal symptoms or uncontrolled pain.

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

When you request vardenafil through an online consultation at Cured Pharmacy, the UK-registered prescriber will ask about all your current medicines, including oxycodone, to assess whether treatment is safe and appropriate. They will check your blood pressure history, any heart or circulation problems, and whether you have experienced dizziness or fainting [5]. If you are taking oxycodone for chronic pain, the prescriber may also consider whether the underlying condition affects your suitability for ED treatment.

The prescriber will ensure you are not taking any medicines that are contraindicated with vardenafil, such as nitrates, nicorandil, riociguat, or other PDE5 inhibitors [5]. They will also review any other blood-pressure-lowering medicines you take, as these can add to the blood-pressure effects of vardenafil. If you are on a stable dose of oxycodone and your blood pressure is well controlled, vardenafil may be prescribed, often starting with a lower dose to minimise the risk of side effects.

Starting treatment safely

If your prescriber approves vardenafil, they may recommend starting with the lowest effective dose (usually 5mg or 10mg) to see how you respond [5]. You should take vardenafil on an empty stomach or after a light meal, as a heavy or high-fat meal can delay its effect. Avoid drinking large amounts of alcohol, as this can increase the risk of dizziness and make it harder to get an erection [5]. If you experience any unusual symptoms, such as severe dizziness, chest pain, or an erection lasting more than four hours, seek medical help immediately.

Practical advice for taking vardenafil and oxycodone safely

If you are prescribed both vardenafil and oxycodone, take each medicine exactly as directed. Do not take more vardenafil than prescribed, and do not take it more than once in 24 hours [5]. Be aware that both medicines can cause dizziness, so avoid standing up quickly and be cautious when driving or doing tasks that require alertness, especially when you first start vardenafil or if your oxycodone dose changes.

Avoid drinking grapefruit juice, as it can increase the levels of vardenafil in your blood and raise the risk of side effects [5]. Limit alcohol intake, as heavy drinking can worsen erectile dysfunction and add to the blood-pressure-lowering effects of both medicines [1]. If you feel dizzy or lightheaded after taking vardenafil, sit or lie down until the feeling passes.

Keep all your medicines in their original packaging, store them safely away from children, and check the expiry dates. If you experience side effects that concern you, or if your pain medication needs to be changed, speak to your GP or the prescriber who issued your oxycodone before making any changes. Always declare all your current medicines, including over-the-counter products and supplements, during your online consultation.

When to seek medical help and other ED treatment options

Seek urgent medical help if you experience chest pain during or after sex, an erection lasting more than four hours (priapism), sudden loss of vision or hearing, or severe dizziness or fainting [5]. These are rare but serious side effects that require immediate attention. If you have new or worsening erectile dysfunction, see your GP, as ED can be an early sign of heart disease, diabetes, or other health conditions that need investigation [1][2].

If vardenafil is not suitable for you, or if you prefer an alternative, other PDE5 inhibitors are available, including sildenafil (Viagra), tadalafil (Cialis), and avanafil (Spedra) [3][4][6]. Each works in a similar way but has different timing and duration of action. Tadalafil, for example, can last up to 36 hours and is also available as a low-dose daily tablet [4]. Your prescriber can discuss which option best fits your lifestyle and medical history.

Non-tablet treatments include Eroxon gel (a medical device available without prescription), Vitaros cream, and Caverject injections (both prescription-only) [7]. Lifestyle changes such as losing weight, exercising regularly, stopping smoking, and reducing alcohol can also improve erectile function [1][2]. At Cured Pharmacy, all prescription ED treatments are supplied only after an online consultation reviewed by a UK-registered prescriber, ensuring safe and appropriate care.

Why choose Cured Pharmacy for your ED treatment

Cured Pharmacy is a GPhC-registered online pharmacy (GPhC 9012511) offering discreet, convenient access to ED treatments. Our online consultation is reviewed by a UK-registered prescriber who checks your medical history and current medicines, including oxycodone, to ensure treatment is safe. We offer a range of ED medicines, from affordable generic options like vardenafil at £16.95 (first order £13.56 with code Ednew) to branded treatments, all delivered discreetly to your door. If you have questions about your treatment, our pharmacist-led team is here to help.

Scientific References

1. NHS. (n.d.). Erectile dysfunction (impotence). NHS website. https://www.nhs.uk/conditions/erection-problems-erectile-dysfunction/ [accessed 2 November 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 2 November 2026]
3. Joint Formulary Committee. (n.d.). Sildenafil. British National Formulary. NICE. https://bnf.nice.org.uk/drugs/sildenafil/ [accessed 2 November 2026]
4. Joint Formulary Committee. (n.d.). Tadalafil. British National Formulary. NICE. https://bnf.nice.org.uk/drugs/tadalafil/ [accessed 2 November 2026]
5. Joint Formulary Committee. (n.d.). Vardenafil. British National Formulary. NICE. https://bnf.nice.org.uk/drugs/vardenafil/ [accessed 2 November 2026]
6. Joint Formulary Committee. (n.d.). Avanafil. British National Formulary. NICE. https://bnf.nice.org.uk/drugs/avanafil/ [accessed 2 November 2026]
7. Joint Formulary Committee. (n.d.). Alprostadil. British National Formulary. NICE. https://bnf.nice.org.uk/drugs/alprostadil/ [accessed 2 November 2026]
8. Electronic Medicines Compendium. (n.d.). Summaries of Product Characteristics and Patient Information Leaflets. https://www.medicines.org.uk/emc/ [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.