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Erectile difficulty is a wider health signal, not only a bedroom problem

8 Min Read
Reviewed September 2026
Written by Mr Stephen Lingam
Medically reviewed

Written by Mr Stephen Lingam · Reviewed by Dr Mohammad Bakhtiar (GMC 4694470) on 25/09/2026

Key takeaways

  • NHS guidance is plain that most men occasionally fail to get or keep an erection, usually from stress, tiredness or drinking too much, and that this is nothing to worry about.
  • Chest pain, severe breathlessness or a suspected heart attack is not a clinic enquiry.
  • Blood tests are arranged only if they would change the plan, for example if diabetes, circulation or a hormone-related cause looks possible from the history.
  • Male hormone replacement is a separate visit when testosterone replacement is already the question, and that pathway lives on the male hormone replacement page rather than being folded into a tablet conversation.
  • Oral PDE5 medicines must not be taken with nitrate medication, so tablets are not prescribed if that combination would be unsafe.
  • When the assessment supports it, the usual first treatment is an oral PDE5 medicine, and the two names patients most often ask about are sildenafil and tadalafil.

You have usually arrived here because sex has become unreliable, and you are trying to decide whether that is only a bedroom problem or a reason to look at the heart, the sugar and the medicines. Those are not the same question, even though they share a symptom. Treating a tablet as the whole answer is how people miss high blood pressure, a diabetes signal, or a heart medicine that should never sit next to sildenafil or tadalafil.

NHS guidance is plain that most men occasionally fail to get or keep an erection, usually from stress, tiredness or drinking too much, and that this is nothing to worry about. If it keeps happening, the same pages say it might be a sign of a health condition that can be treated, and they list physical and psychological causes including cardiovascular disease, diabetes, hormone problems, medicines, stress and anxiety. A discreet GP assessment is there to sort that combination, not to assume the difficulty lives only in the bedroom.

What is the erection telling you?

An erection is a blood-flow event.

ProblemWhere it belongs
Frequent erectile difficultyA GP assessment that checks cardiovascular risk first
Chest pain, severe breathlessness or a suspected heart attack999 or A&E
Urinary symptoms, a testicular lump or a prostate concernA men's urology assessment
Testosterone replacement already the questionMale hormone replacement, a separate visit
Discharge, sores or a suspected sexually transmitted infectionThe sexual health clinic

The penis needs arteries to open, blood to stay, and nerves and hormones to play their part. A change in firmness can therefore be a complaint from the circulation rather than a private failure of desire. NHS pages name high blood pressure and high cholesterol among the conditions behind frequent erectile difficulty. The same vessel-narrowing process that loads the heart and the brain also loads the smaller arteries of the penis, which is why a heart concern can go to the cardiology clinic.

That is why a GP at Medical Express Clinic checks cardiovascular risk first. The question is whether the difficulty is pointing at circulation, and whether any tablet that increases blood flow would be safe with your heart and your current medicines. People who still have morning erections, or who lose function only with a partner, may have a stronger psychological component. A gradual, persistent loss across settings more often has a physical thread. Neither pattern is a diagnosis on its own, so the history comes before the prescription.

Chest pain, severe breathlessness or a suspected heart attack is not a clinic enquiry. That is 999 or A&E. Go to A&E if an erection lasts more than four hours or you suddenly lose vision or hearing.

Where does blood sugar sit?

Diabetes appears in the same NHS list because high blood sugar can damage both the blood supply and the nerves that an erection depends on. Some men already know they have diabetes and have noticed erections changing as control slips. Others have never been tested, and the bedroom is the first place the metabolism has made itself obvious.

Blood tests are arranged only if they would change the plan, for example if diabetes, circulation or a hormone-related cause looks possible from the history, including a separate heart health panel. A number on a printout is not a diagnosis on its own, because the GP reads it with the story you brought. Hormone changes sit in that same group. Low desire, reduced energy, or a history that already points at testosterone can justify a hormone blood test as part of an erectile dysfunction assessment. Male hormone replacement is a separate visit when testosterone replacement is already the question, and that pathway lives on the male hormone replacement page rather than being folded into a tablet conversation.

Can heart medicines change erections?

NHS guidance is also plain that erectile difficulty can be a side effect of some medicines, and that a doctor may switch you to a different one if the current prescription is the cause. Blood-pressure treatment and other long-term medicines appear in ordinary GP lists for this, so a current medication list belongs in the room.

The safety check that matters most before any oral PDE5 medicine, the group that includes sildenafil and tadalafil, is nitrates and other interacting drugs. Those heart medicines and the erection tablets both widen blood vessels. Taken together they can drop blood pressure to a dangerous level, so they must not be combined, and the clinic reviews nitrates and interacting drugs before any oral PDE5 is discussed. If you use a GTN spray, an isosorbide tablet, or another nitrate for angina, say so at the start of the visit, because that fact decides the whole prescribing conversation.

Where do stress and anxiety sit?

NHS pages put depression, anxiety and stress in the same cause list as diabetes and blood pressure. A psychological cause does not cancel a physical one, and a physical cause does not make the worry imaginary. Relationship strain, poor sleep and too much alcohol can sit on top of narrowed arteries, so the assessment looks for the combination that applies to you rather than picking one camp. Counselling and therapy can help when the difficulty is linked to emotional or mental health problems. NHS pages note that those services can involve a long wait, which is not a reason to skip the heart, the sugar and the medicines.

What does the GP review?

A GP erectile dysfunction assessment at Medical Express Clinic is a confidential conversation first. The doctor asks what has changed, what else is happening, and which treatment would be safe, rather than starting from a product name. The history covers when the difficulty started, morning erections, libido, any pain or deformity, current medicines including heart and blood-pressure treatment, and circulation risk such as diabetes, high blood pressure, cholesterol and smoking. Stress, sleep, alcohol and relationship strain sit in the same conversation, since they can accompany a physical cause.

An examination is used only if it would help, and the clinician explains it so you may ask to pause. NHS pages describe basic health checks such as blood pressure, and an examination of the genitals to rule out an obvious physical cause, with a prostate examination considered if you also need to pass urine more often than usual. If urinary symptoms, a testicular lump or a prostate concern is the main problem, that is a men's urology assessment rather than this visit.

When do tablets come in?

When the assessment supports it, the usual first treatment is an oral PDE5 medicine, and the two names patients most often ask about are sildenafil and tadalafil. After reviewing your health, medicines and cardiovascular risk, the GP may prescribe one of those when it is clinically appropriate, and explains how to use the tablet, common side effects and important interactions before any prescription is issued.

Oral PDE5 medicines must not be taken with nitrate medication, so tablets are not prescribed if that combination would be unsafe. They also need sexual stimulation to work. If they are unsuitable, or if you have taken them correctly and still had little benefit, the GP can investigate further and refer you to an appropriate specialist with the history and any test results already in hand. Treatment here focuses on GP assessment and first-line oral medicines.

What helps beforehand?

Bring a current medication list, including inhalers, sprays and anything you take for the chest, because nitrates and interacting drugs have to be reviewed before any oral PDE5.

  • Bring recent blood results if you already have them, and say if you have diabetes, high blood pressure, high cholesterol or known heart disease.
  • Those facts change both the safety conversation and whether blood tests would help.
  • Tell the doctor when the difficulty started, whether morning erections are still there, and whether desire has changed.
  • If you have already tried a tablet, say which one, what dose, and how you used it, rather than only that it failed.
  • NHS advice on what you can do yourself is the same list a GP will come back to: lose weight if you are overweight, stop smoking, eat a healthy diet, exercise daily, and try to reduce stress and anxiety.
  • Do not drink more than 14 units of alcohol a week.
  • If you cycle for more than three hours a week, NHS pages suggest stopping for a while to see whether that is part of the picture.
  • None of that replaces a cardiovascular check.

What should you avoid?

Do not treat frequent erectile difficulty as only a bedroom problem.

  • NHS guidance lists cardiovascular disease, diabetes, hormone problems and medicines among the causes, and the clinic checks cardiovascular risk first for that reason.
  • Do not buy sildenafil from an unregulated website.
  • NHS pages warn that many sites sell fake medicines, and the tablet may not be safe with your heart drugs.
  • If you still go online, NHS advice is to check General Pharmaceutical Council, Care Quality Commission and GMC registration.
  • Do not book this assessment if the main problem is urinary symptoms, a testicular lump or a prostate concern.
  • That belongs in a men's urology assessment.
  • Do not book it for discharge, sores or a suspected sexually transmitted infection, which belong in the sexual health clinic.
  • Do not use a planned erectile dysfunction enquiry for chest pain, severe breathlessness or a suspected heart attack.
  • That is 999 or A&E.
  • If testosterone replacement is already the question you came with, book the hormone visit rather than this one.
  • Do not combine any leftover PDE5 tablet with a nitrate, even if a friend told you the dose was small.
  • If you do want a discreet GP assessment of erectile difficulty, with cardiovascular risk checked first and oral treatment discussed only when it is safe, Medical Express Clinic can see you on Harley Street.
  • The details sit on the erectile dysfunction page.
  • You can contact the clinic on 020 7499 1991.

Related guides: why a low testosterone result is not an automatic prescription and where to start with a heart concern.

Sources

  1. Erectile dysfunction (impotence) — NHS[Link]
Written by
Mr Stephen Lingam

Mr Stephen Lingam

Managing Director

Executive leadership

Medically reviewed by
Dr Mohammad Bakhtiar

Dr Mohammad Bakhtiar

Clinical Lead

Health Screening and Men's Health • GMC 4694470

Frequently asked questions

Is erectile difficulty only a bedroom problem?

Not if it keeps happening. NHS guidance lists physical and psychological causes including cardiovascular disease, diabetes, hormone problems, medicines, stress and anxiety. A GP checks cardiovascular risk first.

Will I have to be examined?

Only if it would help. The clinician explains the examination, and you may ask to pause.

Will I need blood tests?

Not everyone does. Blood tests are arranged only if they would change the plan, for example if diabetes, circulation or a hormone-related cause looks possible.

Can the GP prescribe sildenafil or tadalafil?

Yes, when an oral PDE5 medicine is clinically appropriate. Nitrates and interacting drugs are reviewed first. These medicines must not be taken with nitrates.

What if tablets are unsuitable or do not work?

The GP can investigate further and refer you to an appropriate specialist.

Should I book men's urology or hormone replacement instead?

Book a men's urology assessment if urinary, testicular or prostate symptoms are the main concern. Book male hormone replacement if testosterone replacement is already the question. Discharge, sores or a suspected STI belong in the sexual health clinic.

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