Goserelin Erectile Dysfunction: Causes & Treatment

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How does goserelin cause erectile dysfunction?

Goserelin is a type of medicine called a gonadotropin-releasing hormone (GnRH) agonist. It works by suppressing the production of luteinising hormone (LH) and follicle-stimulating hormone (FSH) from the pituitary gland, which in turn dramatically reduces testosterone production by the testes [12]. This reduction in testosterone is the intended therapeutic effect when treating hormone-sensitive prostate cancer, as it slows the growth of cancer cells that depend on testosterone.

However, testosterone is also essential for normal erectile function. It helps maintain libido (sex drive), supports the health of penile tissue, and plays a role in the physiological processes that lead to an erection [1][2]. When testosterone levels fall to very low levels—often described as 'chemical castration'—most men will experience a significant reduction in sexual desire and difficulty achieving or maintaining erections. This is not a sign that the medicine isn't working; rather, it is a direct consequence of the intended hormonal changes.

The degree of erectile dysfunction can vary between individuals, but studies show that the majority of men on goserelin will experience some degree of sexual side effects. It's important to remember that this is a known and expected effect of the treatment, and discussing it openly with your doctor or specialist nurse is an important part of managing your overall wellbeing during cancer treatment.

How common is goserelin erectile dysfunction?

Erectile dysfunction is one of the most frequently reported side effects of goserelin therapy. Clinical data and patient information leaflets indicate that sexual dysfunction, including loss of libido and erectile difficulties, affects the majority of men receiving this treatment [12]. The exact percentage can vary depending on the study and how sexual function is measured, but it is generally considered a very common side effect.

The onset of erectile difficulties typically occurs within the first few weeks to months of starting goserelin, as testosterone levels fall. Because goserelin is usually given as a long-acting injection (depot) every 4 or 12 weeks, the hormonal suppression is sustained throughout the treatment period. For men receiving goserelin as part of prostate cancer management, treatment may continue for months or even years, meaning that erectile dysfunction can be a long-term issue.

It's also worth noting that other factors can contribute to erectile problems in men with prostate cancer, including the psychological impact of a cancer diagnosis, other treatments such as radiotherapy or surgery, and age-related changes. However, the hormonal effect of goserelin is usually the dominant factor. If you're experiencing erectile difficulties on goserelin, you are not alone, and there are options worth discussing with your healthcare team.

When to get urgent help

• Erection lasting more than 4 hours (priapism)—go to A&E immediately
• Sudden loss of vision or hearing after taking ED treatment—seek urgent medical help
• Chest pain during sexual activity—stop and call 999 if pain does not resolve quickly
• New or worsening urinary symptoms, blood in urine, or pelvic pain—contact your GP or oncology team the same day

Call 999 or go to A&E in an emergency, or contact NHS 111 for urgent advice.

What NOT to do if you have goserelin erectile dysfunction

If you are experiencing erectile dysfunction while taking goserelin, it is absolutely essential that you do not stop or reduce your prescribed treatment without first consulting your doctor or oncologist. Goserelin is prescribed for serious medical conditions, most commonly prostate cancer, and stopping it abruptly could allow testosterone levels to rise again, potentially allowing cancer cells to grow more rapidly [12]. Your cancer treatment plan has been carefully designed by your specialist, and any changes must be made under their supervision.

Similarly, do not attempt to self-treat erectile dysfunction by purchasing medicines from unregulated sources or taking someone else's prescription. Some men may be tempted to try testosterone supplements or other hormonal treatments to counteract the effects of goserelin, but this could directly interfere with your cancer therapy and may be dangerous. Always discuss any new medicines, supplements, or treatments with your prescribing doctor or oncology team first.

It's also important not to suffer in silence. Erectile dysfunction can have a significant impact on your quality of life, relationships, and mental health, and your healthcare team will understand this. Many men feel embarrassed or believe that sexual function is a low priority compared to cancer treatment, but your wellbeing matters, and there are often practical options that can be explored safely alongside your ongoing therapy.

Never combine ED treatments without medical advice

If you are considering or have been offered treatment for erectile dysfunction, never take more than one type of ED medicine at the same time, and never combine PDE5 inhibitors (such as sildenafil or tadalafil) with nitrate medicines, nicorandil, riociguat, or recreational drugs known as 'poppers'. These combinations can cause a dangerous drop in blood pressure [3][4]. Always ensure that any doctor or pharmacist prescribing ED treatment is aware of all your current medicines, including goserelin and any treatments for heart conditions, blood pressure, or other health issues.

Can you take ED tablets while on goserelin?

This is one of the most common questions men ask, and the answer depends on individual circumstances. PDE5 inhibitor tablets—such as sildenafil (Viagra), tadalafil (Cialis), vardenafil (Levitra), and avanafil (Spedra)—work by improving blood flow to the penis in response to sexual stimulation [3][4][5][6]. They do not increase testosterone levels, so they do not interfere with the cancer-suppressing action of goserelin.

However, because goserelin lowers testosterone so significantly, many men find that their libido (sexual desire) is also reduced, and PDE5 inhibitors require some degree of sexual arousal to be effective. This means that while these tablets can help with the physical mechanism of achieving an erection, they may be less effective if sex drive is very low. Some men still find them helpful, particularly if they retain some interest in sexual activity or wish to maintain intimacy with a partner.

There is no direct drug interaction between goserelin and PDE5 inhibitors that would make them unsafe to use together, but your doctor will need to check your overall health, other medicines, and cardiovascular fitness before prescribing ED tablets [1][2]. If you have other conditions such as heart disease, high or low blood pressure, or take certain other medicines (especially nitrates, alpha-blockers, or some antifungals and antibiotics), additional caution or dose adjustments may be needed [3][4]. A prescriber will review your full medical history during a consultation to ensure any ED treatment is safe and appropriate for you.

Other options beyond tablets

If oral ED tablets are not effective or suitable, there are other prescription treatments that work differently. Alprostadil is a medicine that can be applied as a cream (Vitaros) to the opening of the penis or given as a small injection into the side of the penis (Caverject) [7]. These treatments work locally to increase blood flow and can produce an erection even when testosterone is low. Vacuum erection devices are also an option and work by drawing blood into the penis mechanically. Your GP, urologist, or specialist nurse can discuss which options might be most suitable for your situation.

At a glance

Options to discuss with your prescriber about goserelin erectile dysfunction

If erectile dysfunction is affecting your quality of life, it's important to raise this with your oncologist, urologist, GP, or specialist nurse. They can review your overall treatment plan and discuss whether any adjustments or additional support might be appropriate. In some cases, the duration or type of hormone therapy may be flexible, though this will always depend on your cancer treatment needs and must never be changed without specialist advice.

Your healthcare team can also refer you to specialist services, such as psychosexual counselling or a dedicated erectile dysfunction clinic, where you can explore a range of treatment options in a supportive environment. Some cancer centres have specialist nurses who focus on sexual health and wellbeing during and after cancer treatment, and they can provide practical advice, reassurance, and information tailored to your situation.

It's also worth discussing your goals and expectations. Some men prioritise maintaining the ability to have penetrative sex, while others may be more focused on preserving intimacy, physical closeness, or the ability to achieve orgasm (which can sometimes still occur even without a full erection). Understanding what matters most to you can help guide the conversation and ensure that any treatment or support offered is aligned with your personal priorities and values.

Getting help for goserelin erectile dysfunction at Cured Pharmacy

If your doctor has suggested that you might benefit from ED treatment and you would like to explore your options, Cured Pharmacy offers a confidential online consultation service led by UK-registered prescribers. After you complete a short health questionnaire, a prescriber will review your answers, check for any interactions with your current medicines (including goserelin), and assess whether an ED treatment is safe and suitable for you. All prescription medicines are dispensed by our GPhC-registered pharmacy and delivered discreetly to your door.

We offer a range of licensed ED treatments, including sildenafil (generic Viagra) from £0.45 per tablet, tadalafil (generic Cialis) from £7.95, vardenafil (generic Levitra) at £16.95, and avanafil (Spedra) at £20.95. First-time customers can use the code Ednew to receive 20% off their first order. Because every man's situation is different—especially when managing erectile dysfunction alongside cancer treatment—our prescribers take the time to review your full medical history and current medicines to ensure any treatment is appropriate and safe for you.

If you have any questions or would like to discuss your options before starting a consultation, our pharmacy team is available to help. You can also speak to your GP or oncology team first to confirm that they are happy for you to try ED treatment alongside your goserelin therapy. We're here to support you in a way that fits around your cancer care and respects your individual needs and circumstances.

When to see your GP or specialist

While online consultations are convenient, it's important to have regular face-to-face reviews with your GP or oncology team, especially if you are experiencing new or worsening symptoms. If you notice any changes in your general health, urinary symptoms, pain, or other concerns, always discuss these with your doctor. Erectile dysfunction can sometimes be an early sign of other health issues such as heart disease or diabetes [1][10], so if you developed ED before starting goserelin, or if it persists after stopping treatment, a full medical review is important.

In summary

• Goserelin lowers testosterone, which commonly causes erectile dysfunction as an expected side effect
• Never stop or change goserelin without consulting your oncologist or prescribing doctor
• PDE5 inhibitors like sildenafil and tadalafil can often be used safely alongside goserelin after a prescriber review
• Other options include alprostadil, vacuum devices, and psychosexual support—discuss with your healthcare team
• Cured Pharmacy offers confidential online consultations with UK prescribers for licensed ED treatments

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