Leuprorelin and Erectile Dysfunction Explained

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Leuprorelin and Erectile Dysfunction: What You Need to Know

Published: 13 November 2026

Leuprorelin erectile dysfunction is a well-recognised side effect of this hormone therapy, which is commonly prescribed for prostate cancer and certain other conditions. Leuprorelin works by lowering testosterone levels in the body, and because testosterone plays a key role in sexual function, many men experience difficulties getting or keeping an erection while on this treatment. Understanding why this happens and what options are available can help you manage this side effect while continuing your essential medical therapy.

Does Leuprorelin Cause Erectile Dysfunction?

Yes, leuprorelin commonly causes erectile dysfunction in men who take it [1][2]. Leuprorelin is a type of medicine called a gonadotropin-releasing hormone (GnRH) agonist, used primarily to treat prostate cancer and occasionally other hormone-sensitive conditions. It works by suppressing the production of testosterone, the male hormone that is essential for sexual desire and erectile function.

When testosterone levels drop significantly—as they do with leuprorelin therapy—most men will experience a reduction in libido (sex drive) and difficulty achieving or maintaining erections. This is not a sign that the medicine is harmful or being used incorrectly; rather, it is a direct and expected consequence of how leuprorelin works. The degree of erectile dysfunction can vary from person to person, but it is one of the most frequently reported side effects of androgen deprivation therapy [2].

It is important to remember that leuprorelin is prescribed for serious medical reasons, often as a life-saving or life-prolonging treatment for prostate cancer. The benefits of controlling cancer growth typically outweigh the sexual side effects, but that does not mean those side effects should be ignored or left untreated.

How Does Leuprorelin Affect Erections?

Leuprorelin affects erections by dramatically lowering the level of testosterone in your bloodstream [1]. Testosterone is crucial for sexual arousal, the physical changes that lead to an erection, and the maintenance of healthy blood vessels and nerve function in the penis. When leuprorelin suppresses testosterone production, several changes occur that make erections difficult or impossible.

Firstly, reduced testosterone leads to a decrease in sexual desire, meaning you may feel less interested in sex overall. Secondly, the physical mechanisms that allow blood to flow into the penis and create an erection become less responsive. The smooth muscle tissue in the penis relies on testosterone to stay healthy and function properly, and without it, the tissue can become less elastic and less able to trap blood during arousal [2].

These changes usually begin within weeks to months of starting leuprorelin and persist for as long as the treatment continues. In some cases, the effects on erectile function may improve gradually after stopping leuprorelin, as testosterone levels recover, but this is not guaranteed and recovery can take many months or may be incomplete, especially in older men or those who have been on treatment for a long time.

How Common Is Leuprorelin Erectile Dysfunction?

Erectile dysfunction is very common in men taking leuprorelin, affecting the majority of those on androgen deprivation therapy [2]. Studies suggest that sexual side effects, including loss of libido and erectile dysfunction, occur in a high proportion of men undergoing this treatment, though the exact percentage can vary depending on age, baseline sexual function, and other health factors. It is one of the most predictable side effects of hormone therapy for prostate cancer and should be discussed with your specialist before starting treatment so you know what to expect.

Never Stop Leuprorelin Without Medical Advice

It is essential that you never stop taking leuprorelin or alter your dose without first speaking to the doctor who prescribed it [1][2]. Leuprorelin is usually prescribed to control the growth of prostate cancer or manage other serious hormone-dependent conditions. Stopping the medicine suddenly or without supervision could allow the disease to progress, potentially putting your health and life at risk.

If you are experiencing erectile dysfunction or other side effects that are affecting your quality of life, the right course of action is to discuss these concerns openly with your oncologist, urologist, or GP. They can review your overall treatment plan, consider whether any adjustments are possible, and explore additional treatments that may help manage the sexual side effects without compromising your cancer therapy.

Your healthcare team understands that sexual health is an important part of overall wellbeing, and they are there to support you. Do not suffer in silence or make changes to your prescribed treatment on your own. There are options available to help, and your doctors can guide you through them safely.

Options to Discuss with Your Prescriber

If you are experiencing leuprorelin erectile dysfunction, there are several options you can discuss with your doctor or specialist [1][2]. The most appropriate choice will depend on your individual circumstances, including the type and stage of your cancer, your overall health, and your personal preferences. Your healthcare team can help you weigh the benefits and risks of each approach.

One option is to explore whether PDE5 inhibitor tablets—such as sildenafil, tadalafil, vardenafil, or avanafil—might help improve your erections. These medicines work by increasing blood flow to the penis when you are sexually aroused, and they can sometimes be effective even when testosterone levels are low, though they may not work as well as they do in men with normal hormone levels [1][2].

Other options include vacuum erection devices, which use suction to draw blood into the penis and a constriction ring to maintain the erection, or alprostadil treatments (either as a cream applied to the tip of the penis or as an injection into the side of the penis). Some men may also benefit from psychosexual counselling or support to address the emotional and relationship impact of erectile dysfunction [2]. Your prescriber can discuss which options are suitable and safe for you.

Adjusting Your Cancer Treatment

In some cases, your oncologist may be able to adjust the timing or type of hormone therapy to reduce side effects, for example by using intermittent androgen deprivation (treatment breaks) rather than continuous therapy, if this is appropriate for your cancer [2]. However, this decision must always be made by your specialist based on your cancer's characteristics and response to treatment. Never assume that adjustments are possible or safe without a full clinical review.

Can You Use ED Tablets with Leuprorelin?

Yes, ED tablets such as sildenafil, tadalafil, vardenafil, and avanafil can usually be used alongside leuprorelin, provided you do not have any other medical conditions or take other medicines that make them unsuitable [1][2]. There is no direct interaction between leuprorelin and PDE5 inhibitor tablets, so they can be prescribed together safely in most cases.

However, it is important to understand that ED tablets may be less effective in men with very low testosterone levels caused by leuprorelin [2]. These medicines work by improving blood flow to the penis during sexual arousal, but they do not replace testosterone or restore libido. Some men find that they still achieve useful erections with the help of these tablets, while others may need to try different doses or consider alternative treatments.

Before starting any ED treatment, you must have a consultation with a prescriber who will review your full medical history, current medicines, and any conditions that might make ED tablets unsafe—such as recent heart attack or stroke, severe heart failure, very low blood pressure, or the use of nitrate medicines (such as GTN spray or isosorbide mononitrate) or nicorandil [3][4][5][6]. You must never take ED tablets if you use nitrates or nicorandil, as the combination can cause a dangerous drop in blood pressure. Your prescriber will check all of this during your consultation.

Treatment Options Available at Cured Pharmacy

If your prescriber agrees that ED tablets are suitable for you, Cured Pharmacy offers a range of licensed treatments that can be prescribed following an online consultation with a UK-registered prescriber. All prescription medicines require clinical assessment to ensure they are safe and appropriate for your individual circumstances.

Sildenafil (the generic version of Viagra) is available from £0.45 per tablet (£0.36 with first-order code Ednew), and tadalafil (generic Cialis) from £7.95 (£6.36 with code Ednew). Branded options include Viagra at £37.95 (£30.36 with code Ednew) and Cialis at £12.00 (£9.60 with code Ednew). Other options include vardenafil (generic Levitra) at £16.95 (£13.56 with code Ednew) and Spedra (avanafil) at £20.95 (£16.76 with code Ednew).

The online consultation will ask about your medical history, current medicines (including leuprorelin and any cancer treatments), and any conditions that might affect the safety of ED tablets. A UK prescriber will review your answers and, if appropriate, approve a prescription. The medicine is then dispensed by Cured Pharmacy (GPhC 9012511) and delivered discreetly to your door. If ED tablets are not suitable, the prescriber will explain why and may suggest discussing alternative options with your GP or specialist.

What to Expect from ED Tablets on Leuprorelin

It is important to have realistic expectations when using ED tablets while on leuprorelin. Because your testosterone levels are suppressed, you may find that your libido remains low even if the tablets help you achieve an erection. The tablets require sexual stimulation to work—they do not create desire or arousal on their own [3][4][5][6]. Some men find that trying different doses or different types of PDE5 inhibitor can make a difference, so do not be discouraged if the first option does not work perfectly. Speak to your prescriber about adjusting your treatment if needed.

Scientific References

1. NHS. (n.d.). Erectile dysfunction (impotence). NHS website. https://www.nhs.uk/conditions/erection-problems-erectile-dysfunction/ [accessed 13 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 13 November 2026]
3. Joint Formulary Committee. (n.d.). Sildenafil. British National Formulary. NICE. https://bnf.nice.org.uk/drugs/sildenafil/ [accessed 13 November 2026]
4. Joint Formulary Committee. (n.d.). Tadalafil. British National Formulary. NICE. https://bnf.nice.org.uk/drugs/tadalafil/ [accessed 13 November 2026]
5. Joint Formulary Committee. (n.d.). Vardenafil. British National Formulary. NICE. https://bnf.nice.org.uk/drugs/vardenafil/ [accessed 13 November 2026]
6. Joint Formulary Committee. (n.d.). Avanafil. British National Formulary. NICE. https://bnf.nice.org.uk/drugs/avanafil/ [accessed 13 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.