Acromegaly and Erectile Dysfunction Explained

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Acromegaly and Erectile Dysfunction: Understanding the Link and Treatment Options

Published: 13 October 2026

Acromegaly and erectile dysfunction (ED) are closely connected, with up to 40–60% of men with acromegaly experiencing difficulties achieving or maintaining an erection. Acromegaly is a rare hormonal disorder caused by excess growth hormone, usually from a benign pituitary tumour. This hormonal imbalance can disrupt testosterone production, damage blood vessels, and affect the nerves involved in erections, making ED a common complication even before diagnosis or during treatment.

How acromegaly and erectile dysfunction are linked

Acromegaly develops when the pituitary gland produces too much growth hormone, typically because of a non-cancerous tumour (adenoma). This excess growth hormone stimulates the liver to produce insulin-like growth factor 1 (IGF-1), which drives abnormal tissue growth and metabolic changes throughout the body. The hormonal disruption directly affects sexual function in several ways.

First, the pituitary tumour itself can compress or damage the gland's normal tissue, reducing production of luteinising hormone (LH) and follicle-stimulating hormone (FSH). These hormones signal the testes to produce testosterone, so their suppression often leads to low testosterone (hypogonadism), a major cause of erectile dysfunction [1]. Second, high levels of growth hormone and IGF-1 can cause insulin resistance and diabetes, which damage the small blood vessels and nerves essential for erections [2]. Third, the physical changes of acromegaly—such as joint pain, fatigue, and altered appearance—can reduce confidence and libido, adding a psychological dimension to ED.

Even after successful treatment of acromegaly, some men continue to experience erectile problems because of lasting damage to the pituitary gland, blood vessels, or nerves. However, many find that sexual function improves once growth hormone levels are controlled and any testosterone deficiency is addressed.

Symptoms and assessment of erectile dysfunction in acromegaly

Men with acromegaly may notice difficulty getting or keeping an erection firm enough for sex, reduced sexual desire, or problems with ejaculation. Because acromegaly develops slowly over many years, sexual symptoms often appear gradually and may be dismissed as stress or ageing. Other signs of acromegaly include enlarged hands and feet, facial changes (prominent brow, nose, and jaw), excessive sweating, headaches, and vision problems if the tumour presses on the optic nerves.

If you have been diagnosed with acromegaly and are experiencing ED, your GP or endocrinologist will want to assess the underlying causes. Blood tests will check your growth hormone and IGF-1 levels to see how well your acromegaly is controlled, as well as testosterone, LH, FSH, prolactin, and thyroid hormones. Low testosterone is very common in acromegaly and is a treatable cause of ED. Your doctor may also check your blood sugar and HbA1c (a marker of diabetes), blood pressure, and cholesterol, because cardiovascular and metabolic problems are more common in acromegaly and contribute to erectile dysfunction [2].

A physical examination and discussion of your symptoms, medications, and overall health will help identify any other factors affecting erections. If the pituitary tumour has not yet been treated, or if your growth hormone levels remain high, addressing the acromegaly itself is the first priority and may improve sexual function.

When to see your doctor

New or worsening erectile dysfunction should always be discussed with your GP or specialist, especially if you have acromegaly. ED can be an early warning sign of uncontrolled growth hormone, low testosterone, diabetes, or cardiovascular disease, all of which need prompt attention [1]. Your doctor can arrange blood tests, review your acromegaly treatment, and refer you to an endocrinologist or urologist if needed. Do not stop or change any prescribed medication without medical advice.

Lifestyle measures for acromegaly and erectile dysfunction

While treating the underlying acromegaly and any hormonal deficiencies is essential, lifestyle changes can support better erectile function and overall health. Maintaining a healthy weight is particularly important, as obesity worsens insulin resistance and lowers testosterone. A balanced diet rich in vegetables, fruit, whole grains, lean protein, and healthy fats can help manage blood sugar and reduce cardiovascular risk.

Regular physical activity improves blood flow, insulin sensitivity, and mood, all of which benefit erections. Aim for at least 150 minutes of moderate exercise (such as brisk walking, cycling, or swimming) each week, along with strength training twice a week. If joint pain from acromegaly limits your activity, discuss suitable exercises with a physiotherapist.

Smoking damages blood vessels and significantly worsens erectile dysfunction, so stopping smoking is one of the most effective steps you can take [2]. The NHS offers free support through local stop-smoking services. Limiting alcohol is also important, as heavy drinking can make ED worse and interfere with hormone balance. Reducing stress and getting enough sleep support testosterone production and sexual desire. If anxiety or low mood are affecting your sex life, talk to your GP about psychological support or counselling.

Medical treatment options for erectile dysfunction in acromegaly

The first step in treating ED in acromegaly is to optimise control of the underlying condition. This may involve surgery to remove the pituitary tumour, medication to lower growth hormone and IGF-1 (such as somatostatin analogues, dopamine agonists, or pegvisomant), or radiotherapy. As growth hormone levels normalise, some men notice an improvement in erectile function, though this can take months.

If blood tests show low testosterone, testosterone replacement therapy (TRT) may be recommended by your endocrinologist. TRT can restore libido, energy, and erectile function, but it must be prescribed and monitored carefully, especially if you have other health conditions. It is not suitable for men with prostate or breast cancer, and regular follow-up is needed to check blood counts and prostate health.

For many men with acromegaly, oral ED medications called PDE5 inhibitors are safe and effective once growth hormone is controlled and any serious heart or blood pressure problems have been ruled out. These medicines—sildenafil (Viagra), tadalafil (Cialis), vardenafil (Levitra), and avanafil (Spedra)—work by increasing blood flow to the penis during sexual stimulation [3][4][5][6]. They do not cure ED or increase desire, but they can help achieve and maintain an erection firm enough for sex. All require a prescription and are only supplied after a clinical assessment by a UK prescriber to ensure they are safe for you.

How PDE5 inhibitors work

PDE5 inhibitors relax the smooth muscle in the blood vessels of the penis, allowing more blood to flow in when you are sexually aroused. Sildenafil is taken about one hour before sex and lasts around four to six hours. Tadalafil can be taken on-demand (at least 30 minutes before sex, with effects lasting up to 36 hours) or as a low daily dose. Vardenafil works in 25–60 minutes, and avanafil is the fastest-acting, often effective within 15–30 minutes [3][4][5][6]. All need sexual stimulation to work and should be taken at most once a day (or daily for low-dose tadalafil).

Important safety considerations for acromegaly and erectile dysfunction treatment

PDE5 inhibitors are generally well tolerated, but they are not suitable for everyone. You must never take them if you use nitrate medicines (such as GTN spray, isosorbide mononitrate, or isosorbide dinitrate) for angina, or nicorandil, riociguat, or recreational drugs called poppers (amyl or alkyl nitrites). The combination can cause a dangerous drop in blood pressure [3][4][5][6].

If you take an alpha-blocker for prostate symptoms or high blood pressure (such as doxazosin, tamsulosin, or alfuzosin), there is a risk of dizziness or low blood pressure when starting a PDE5 inhibitor. You should be stable on the alpha-blocker and start on the lowest dose of the ED medicine, with careful monitoring. Other blood pressure medicines can also add to the blood-pressure-lowering effect, so your prescriber will review all your current medications during the consultation.

Some medicines used to treat infections or HIV (such as ritonavir, cobicistat, ketoconazole, itraconazole, or clarithromycin) can raise levels of PDE5 inhibitors in your blood, requiring dose adjustments or making some options unsuitable [3][4][5][6]. Always declare every medicine, supplement, and herbal remedy you take, including those bought without a prescription. Grapefruit juice can also raise levels of these medicines and should be avoided.

PDE5 inhibitors are not recommended if sexual activity itself is inadvisable—for example, if you have had a recent heart attack or stroke, unstable angina, severe heart failure, very low blood pressure, or certain inherited eye conditions. Your prescriber will assess your cardiovascular health as part of the consultation. If you experience chest pain during sex, stop and seek urgent medical help. An erection lasting more than four hours (priapism) or sudden loss of vision or hearing also requires immediate attention [1][2].

Accessing treatment through Cured Pharmacy

Cured Pharmacy is a GPhC-registered online pharmacy (GPhC 9012511) offering discreet, convenient access to ED treatment after a clinical consultation. You complete a short online health questionnaire, which is reviewed by a UK-registered prescriber (doctor or pharmacist prescriber). If treatment is appropriate and safe for you, your prescription is dispensed and delivered in plain, unmarked packaging.

We offer a range of licensed ED medicines at transparent prices. Sildenafil (generic Viagra) starts 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 and faster-acting medicines such as Spedra (avanafil) are also available. All prices include the prescriber consultation, so there are no hidden fees.

If you have acromegaly, it is important to tell the prescriber during your consultation. They will review your current medications (including any acromegaly treatments, testosterone replacement, or blood pressure medicines), check for interactions, and ensure that an oral ED medicine is safe for you. If oral treatment is not suitable, your GP or specialist can discuss alternatives such as alprostadil (Vitaros cream or Caverject injection), vacuum devices, or referral to a urology service [7]. Never stop or change a medicine prescribed by your endocrinologist or GP without their advice.

What to expect from your consultation

The online consultation asks about your general health, cardiovascular history, current medications, and any symptoms of acromegaly or other conditions. Be honest and thorough—this information is confidential and essential for your safety. The prescriber may contact you for more details or suggest you see your GP if further assessment is needed before starting ED treatment. Once approved, your medicine is usually dispatched within 24 hours.

Scientific References

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

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