Sildenafil and Rosuvastatin: Can You Take Them Together?

Sildenafil and Rosuvastatin: Understanding the Interaction

Published: 16 October 2026

Many men taking rosuvastatin for high cholesterol wonder whether sildenafil and rosuvastatin can be taken together safely. The good news is that there is no major direct interaction between these two medicines, and many men use them together without problems. However, your prescriber will still need to check your overall cardiovascular health and other medicines during your consultation, as both medications can affect blood pressure and circulation.

What is sildenafil and rosuvastatin used for?

Sildenafil is a medicine used to treat erectile dysfunction (ED). 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 [3]. Sildenafil is the active ingredient in Viagra and is available in doses of 25mg, 50mg, and 100mg. You take it about one hour before sexual activity, and it works only when you are sexually stimulated.

Rosuvastatin is a statin medicine used to lower cholesterol levels in the blood. It works by blocking an enzyme in the liver that produces cholesterol, helping to reduce your risk of heart attacks and strokes. Rosuvastatin is commonly prescribed for people with high cholesterol, cardiovascular disease, or those at increased risk of heart problems. It is usually taken once daily, often in the evening.

Both medicines are widely prescribed in the UK, and it is common for men to need treatment for both high cholesterol and erectile dysfunction, particularly as both conditions become more prevalent with age [1].

Do sildenafil and rosuvastatin interact with each other?

There is no significant direct interaction between sildenafil and rosuvastatin that would prevent you from taking them together [3]. Neither medicine substantially affects the way the other is processed by your body, and they do not share the same metabolic pathways in a way that would cause dangerous levels of either drug to build up.

However, both medicines can have effects on your cardiovascular system. Sildenafil can lower blood pressure slightly, which is usually mild and well-tolerated. Rosuvastatin is used to protect your heart and blood vessels, but in rare cases statins can cause muscle problems. Your prescriber will want to know about both medicines to assess your overall heart health and ensure that sexual activity is safe for you.

The key consideration is not the interaction between the two medicines themselves, but rather your underlying cardiovascular health. Men with high cholesterol often have other risk factors for heart disease, and your prescriber needs to check that your heart is healthy enough for sexual activity before prescribing sildenafil [2].

How the medicines work in your body

Sildenafil is broken down mainly by an enzyme called CYP3A4 in the liver. Rosuvastatin, unlike some other statins, is not significantly metabolised by CYP3A4, which is why there is no major interaction between the two [3]. This means rosuvastatin does not increase sildenafil levels in your blood, and sildenafil does not affect how rosuvastatin works to lower your cholesterol.

What does your prescriber check before prescribing sildenafil and rosuvastatin together?

When you request sildenafil treatment and you are already taking rosuvastatin, your prescriber will carry out a thorough assessment during your online consultation. They will ask about your cardiovascular history, including any history of heart attacks, strokes, angina, heart failure, or abnormal heart rhythms. The fact that you are taking rosuvastatin indicates you have or are at risk of cardiovascular disease, so this assessment is particularly important [2].

Your prescriber will also check your blood pressure and ask whether you have any symptoms such as chest pain, breathlessness, or dizziness. Sildenafil is not suitable if you have very low blood pressure, unstable angina, or if you have had a recent heart attack or stroke. They will also ask about all your other medicines, because some drugs can interact dangerously with sildenafil, even if rosuvastatin itself does not [3].

You will be asked about any other health conditions, including kidney or liver problems, bleeding disorders, or eye conditions such as previous sudden vision loss (NAION). Your prescriber needs to ensure that sexual activity is safe for you and that sildenafil is an appropriate treatment. If you are stable on rosuvastatin and your cardiovascular health is otherwise good, sildenafil can usually be prescribed safely.

Medicines that do interact with sildenafil

While sildenafil and rosuvastatin can be taken together, there are some medicines that must never be combined with sildenafil. Do not take sildenafil if you are using nitrate medicines such as GTN spray, isosorbide mononitrate, or isosorbide dinitrate for angina. The combination can cause a dangerous drop in blood pressure [3]. Similarly, do not take sildenafil with nicorandil, riociguat, or recreational drugs called 'poppers' (amyl or alkyl nitrites).

Alpha-blocker medicines for prostate problems (such as tamsulosin, doxazosin, or alfuzosin) can also interact with sildenafil, increasing the risk of dizziness or fainting due to low blood pressure. If you take an alpha-blocker, you must declare this during your consultation. Your prescriber may still be able to prescribe sildenafil, but you will need to start on the lowest dose and be stable on your alpha-blocker first [3].

Some medicines that affect how the liver processes drugs, such as ritonavir, cobicistat, ketoconazole, itraconazole, or clarithromycin, can increase sildenafil levels in your blood. Your prescriber will adjust your sildenafil dose if you take any of these. Always list every medicine, supplement, and herbal remedy you take during your consultation, even if you think it is unrelated.

Other statins and sildenafil

If you take a different statin such as atorvastatin or simvastatin, the same principles apply. Most statins do not interact significantly with sildenafil. However, some statins like atorvastatin and simvastatin are metabolised by CYP3A4, and if you are also taking a medicine that strongly affects this enzyme, your prescriber will need to consider both interactions together. Always declare your statin and any other medicines during your consultation [3].

Practical advice for taking sildenafil and rosuvastatin

If you have been prescribed both sildenafil and rosuvastatin, you can take them on the same day without concern. Rosuvastatin is usually taken once daily, often in the evening, while sildenafil is taken about one hour before you plan to have sex, up to once a day. There is no need to separate the doses or avoid taking them at the same time if that happens to be convenient [3].

Continue taking your rosuvastatin exactly as prescribed by your doctor. Do not stop or change your statin dose without medical advice, even if you are starting sildenafil. Your statin is protecting your heart and blood vessels, and stopping it could increase your risk of cardiovascular events. If you experience any new symptoms such as unexplained muscle pain, weakness, or tenderness, contact your GP, as these can rarely be side effects of statins.

When taking sildenafil, avoid drinking large amounts of alcohol, as this can make erectile dysfunction worse and increase the risk of side effects such as dizziness, headache, and low blood pressure. Grapefruit juice can increase the levels of some medicines in your blood, so it is best to avoid it when taking sildenafil. If you experience chest pain during or after sex, stop and seek urgent medical help, as this could be a sign of a heart problem [1].

When to seek medical advice about sildenafil and rosuvastatin

You should seek urgent medical help if you experience an erection lasting more than four hours (priapism), sudden loss of vision or hearing, or chest pain during or after sexual activity. These are rare but serious side effects that require immediate attention [3]. If you have chest pain, call 999 or go to A&E straight away, and do not take any more sildenafil until you have been assessed.

Contact your GP if you develop new or worsening symptoms such as breathlessness, dizziness, fainting, or swelling of the ankles, as these could indicate a cardiovascular problem that needs investigation. If you experience unexplained muscle pain, tenderness, or weakness, particularly if you feel unwell or have a fever, contact your GP promptly, as this could be a rare side effect of rosuvastatin.

If sildenafil does not work for you, or if you have side effects that are troublesome, speak to your prescriber. There are other PDE5 inhibitors available, such as tadalafil, vardenafil, and avanafil, which may suit you better. Your prescriber can also review whether any other medicines or health conditions might be affecting your response to treatment. Never take more sildenafil than prescribed, and do not take it more than once in 24 hours [2].

Seeing your GP about erectile dysfunction

If you have not already done so, it is a good idea to see your GP about erectile dysfunction, even if you are using an online service for treatment. ED can be an early warning sign of cardiovascular disease or diabetes, and your GP can carry out tests and checks to identify any underlying health problems. Your GP can also review your rosuvastatin treatment and overall cardiovascular risk, and work with you to optimise your health [1][2].

Scientific References

1. NHS. (n.d.). Erectile dysfunction (impotence). NHS website. https://www.nhs.uk/conditions/erection-problems-erectile-dysfunction/ [accessed 16 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 16 October 2026]
3. Joint Formulary Committee. (n.d.). Sildenafil. British National Formulary. NICE. https://bnf.nice.org.uk/drugs/sildenafil/ [accessed 16 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.