Vardenafil and Risedronate: Can You Take Them Together?
Learn about the interaction between these medicines and how our UK pharmacist-led consultation ensures your safety.
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Vardenafil and Risedronate: Understanding the Interaction
Published: 4 November 2026
Many men taking risedronate for osteoporosis or bone health wonder whether vardenafil and risedronate can be taken together safely. The good news is that no major interaction between these two medicines is commonly reported, and they are often prescribed together. However, every medication you take must be declared during your consultation, so your prescriber can check your full medical history and ensure vardenafil is suitable for you.
At a glance
What Is Vardenafil and How Does It Work?
Vardenafil is the generic name for Levitra, a prescription medicine used to treat erectile dysfunction (ED) in men [5]. It belongs to a group of medicines called PDE5 inhibitors, which work 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 5mg, 10mg, and 20mg tablets. You usually take it about 25 to 60 minutes before sex, 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. Like all PDE5 inhibitors, vardenafil requires a prescription and is only supplied after an online consultation reviewed by a UK-registered prescriber.
What Is Risedronate and Why Is It Prescribed?
Risedronate is a bisphosphonate medicine used to treat and prevent osteoporosis, a condition that weakens bones and makes them more likely to fracture. It is also used to treat Paget's disease of bone. Risedronate works by slowing down the cells that break down bone, helping to maintain bone strength and reduce the risk of fractures.
Risedronate is usually taken once a week or once a month, depending on the formulation. It must be taken on an empty stomach, first thing in the morning, with a full glass of plain water. You need to stay upright (sitting or standing) for at least 30 minutes after taking it, and you should not eat, drink anything other than water, or take other medicines during that time. This helps the medicine be absorbed properly and reduces the risk of irritation to your oesophagus (food pipe).
Do Vardenafil and Risedronate Interact?
There is no commonly reported interaction between vardenafil and risedronate. These medicines work in completely different ways and are processed by the body through different pathways. Risedronate is a bisphosphonate that affects bone metabolism, while vardenafil is a PDE5 inhibitor that acts on blood vessels in the penis. They do not interfere with each other's mechanism of action.
However, it is still essential to tell your prescriber about all medicines you take, including risedronate, during your consultation. This allows them to review your full medical history, check for any other medicines or health conditions that might affect your suitability for vardenafil, and ensure the dose is right for you. Never stop or change a prescribed medicine like risedronate without advice from your doctor or pharmacist.
Why You Must Declare All Your Medicines
Even though vardenafil and risedronate do not interact, other medicines you take might. For example, some blood pressure medicines, certain antibiotics, antifungals, and HIV medicines can affect how vardenafil works or increase the risk of side effects [5]. Your prescriber will check every current medicine during the consultation to ensure vardenafil is safe for you. This is why honest, complete information is so important for your safety.
What you need to know
- No commonly reported interaction exists between vardenafil and risedronate
- Declare all medicines during your consultation for a full safety check
- Never take vardenafil with nitrates, nicorandil, riociguat, or poppers
- Vardenafil works only with sexual stimulation and is taken before sex
- Risedronate is taken on an empty stomach in the morning with no timing clash
What Your Prescriber Checks Before Approving Vardenafil
Before prescribing vardenafil, your clinician will review your medical history and current medicines to ensure it is safe for you. They will check whether you have any heart or blood vessel problems, such as recent heart attack or stroke, unstable angina, severe heart failure, or very low blood pressure. Vardenafil is not suitable if sexual activity itself is inadvisable for your heart [5].
Your prescriber will also check whether you take any medicines that must not be combined with vardenafil. These include nitrates (such as GTN spray, isosorbide mononitrate or dinitrate), nicorandil, riociguat, or amyl/alkyl nitrites (poppers). Taking vardenafil with any of these can cause a dangerous fall in blood pressure [5]. You will also be asked about alpha-blockers (such as tamsulosin or doxazosin), certain antibiotics, antifungals, and HIV medicines, as these may require a lower starting dose or extra caution.
If you take risedronate, your prescriber will note this but it will not prevent you from using vardenafil, provided there are no other contraindications. The consultation is designed to be thorough yet straightforward, and most men are approved for treatment on the same day.
Medicines That Must Not Be Taken With Vardenafil
Do not take vardenafil together with nitrates (GTN spray, isosorbide mononitrate, isosorbide dinitrate), nicorandil, riociguat, amyl or alkyl nitrites (poppers), or another PDE5 inhibitor (such as sildenafil, tadalafil, or avanafil). Combining these medicines can cause a serious drop in blood pressure that may be life-threatening [5]. Always tell your prescriber about every medicine you use, including those bought over the counter or online.
Practical Advice for Taking Vardenafil and Risedronate
If you take both vardenafil and risedronate, you can continue both medicines as prescribed. Because risedronate must be taken on an empty stomach first thing in the morning, and vardenafil is taken about 25 to 60 minutes before sex, there is no practical clash in timing. Simply take risedronate as directed by your doctor (usually once a week or once a month), and take vardenafil when you plan to have sex, following the instructions on your prescription.
Remember that vardenafil works only when you are sexually aroused, so it is not an automatic trigger for an erection. Avoid heavy meals and excessive alcohol before taking vardenafil, as these can reduce its effectiveness and add to the risk of side effects such as dizziness or low blood pressure [5]. Grapefruit juice can also raise vardenafil levels in your blood, so it is best avoided.
If you experience any unusual symptoms after starting vardenafil, such as dizziness, chest pain, or an erection lasting more than four hours, seek medical help immediately. Most men tolerate vardenafil well, but it is important to know the warning signs and when to get help.
When to get urgent help
- Erection lasting more than 4 hours (priapism) – go to A&E immediately
- Sudden loss of vision or hearing – seek urgent medical help
- Chest pain during or after sex – call 999 or go to A&E
- Severe dizziness or fainting after taking vardenafil – seek same-day medical advice
- Allergic reaction (rash, swelling, difficulty breathing) – call 999
Call 999 or go to A&E in an emergency, or contact NHS 111 for urgent advice.
When to Seek Medical Advice About Vardenafil and Risedronate
If you have been taking risedronate and are considering treatment for erectile dysfunction, speak to your GP or use an online consultation service like Cured Pharmacy. Your prescriber will review your full medical history, including your bone health treatment, and determine whether vardenafil or another ED medicine is suitable for you. ED can sometimes be an early sign of heart disease or diabetes, so it is important to have a proper assessment [1][2].
If you are already taking vardenafil and your doctor prescribes risedronate (or vice versa), there is no need to stop either medicine. However, do inform both your GP and your online prescriber about all your current treatments so they can keep accurate records and monitor your overall health. If you experience side effects from either medicine, or if your symptoms change, contact your healthcare provider for advice. Never stop a prescribed medicine without guidance, as this could affect your bone health or other aspects of your wellbeing.
Getting Help for Erectile Dysfunction
Erectile dysfunction is common and treatable, affecting many men at some point in their lives [1]. If you are experiencing ED, it is worth seeing your GP for a full health check, as ED can be linked to underlying conditions such as diabetes, high blood pressure, or heart disease [2]. Once any underlying causes are addressed, prescription treatments like vardenafil can help you regain confidence and enjoy a fulfilling sex life. At Cured Pharmacy, our UK-registered prescribers review every consultation individually, ensuring you receive safe, effective treatment tailored to your needs.
Timing Your Medicines
Take risedronate first thing in the morning on an empty stomach, then take vardenafil about an hour before sex when needed. There is no practical clash, and both medicines can be continued as prescribed.
Scientific References
- NHS. (n.d.). Erectile dysfunction (impotence). NHS website. https://www.nhs.uk/conditions/erection-problems-erectile-dysfunction/ [accessed 4 November 2026]
- National Institute for Health and Care Excellence. (n.d.). Erectile dysfunction. Clinical Knowledge Summaries. https://cks.nice.org.uk/topics/erectile-dysfunction/ [accessed 4 November 2026]
- Joint Formulary Committee. (n.d.). Vardenafil. British National Formulary. NICE. https://bnf.nice.org.uk/drugs/vardenafil/ [accessed 4 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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Start My Assessment Log in to Your AccountYour Questions Answered
Can I take vardenafil if I am on risedronate for osteoporosis?
Yes, there is no commonly reported interaction between vardenafil and risedronate, and they are often prescribed together. You must declare all your medicines during your consultation so your prescriber can check your full medical history.
Will risedronate affect how well vardenafil works?
No, risedronate does not interfere with the way vardenafil works. They act on different systems in the body and are processed through different pathways.
Do I need to take vardenafil and risedronate at different times of day?
Risedronate must be taken on an empty stomach first thing in the morning, while vardenafil is taken about 25 to 60 minutes before sex. There is no practical clash in timing.
Are there any medicines I must not take with vardenafil?
Yes, do not take vardenafil with nitrates, nicorandil, riociguat, poppers, or another PDE5 inhibitor, as this can cause a dangerous drop in blood pressure. Always declare all medicines during your consultation.
Can I take other bisphosphonates like alendronic acid with vardenafil?
Yes, no major interaction is commonly reported between vardenafil and bisphosphonates such as alendronic acid or ibandronic acid. Declare all medicines during your consultation.
Will my GP know I am taking vardenafil if I use an online pharmacy?
You can choose whether to inform your GP. At Cured Pharmacy, we encourage you to keep your GP informed, and we can notify them with your consent.
What should I do if I get side effects from vardenafil?
Common side effects include headache, flushing, and indigestion. If you experience chest pain, an erection lasting more than four hours, or sudden loss of vision or hearing, seek urgent medical help.
Can I switch from vardenafil to another ED medicine if I take risedronate?
Yes, other PDE5 inhibitors such as sildenafil or tadalafil also have no commonly reported interaction with risedronate. Your prescriber can discuss the best option for you during your consultation.
Medically reviewed by
Tarun Kumar, Superintendent Pharmacist (GPhC 2233073)