If you have been dealing with erectile dysfunction (ED) and have reached the point where you want to do something about it, you are in a better position than you might think. ED treatment in the UK has advanced considerably over the past two decades, and the vast majority of men who seek help find an approach that works for them.
But the sheer number of options — from tablets and injections to pumps, lifestyle changes, and therapy — can make the landscape confusing. Some men end up trying whatever they stumble across first, rather than the treatment most suited to their situation. Others get stuck researching and never take the step of actually starting treatment.
This article walks through the main ED treatment options available across the UK, covering how they work, who they suit, what the side effects look like, and how to make an informed choice. No hype, no false promises — just the clinical reality of what is available and what the evidence says about each option.
First Things First: Why Treatment Works Better When the Cause Is Understood
Before diving into specific treatments, it is worth emphasising a point that often gets lost in the rush to find a solution: the most effective ED treatment is the one that addresses your particular cause.
ED caused by performance anxiety responds differently than ED caused by diabetes or cardiovascular disease. ED related to a medication side effect requires a different approach than ED associated with low testosterone. A man whose ED is primarily driven by obesity and poor cardiovascular fitness will get better long-term results from lifestyle modification combined with medication than from medication alone.
This is why an assessment — even a brief online consultation — is a valuable starting point. It helps match the treatment to the problem, which dramatically improves the likelihood of a good outcome.
PDE5 Inhibitors: The First-Line Medical Treatment
For the majority of men with ED, the starting point is a class of medication known as PDE5 inhibitors (phosphodiesterase type 5 inhibitors). These are the most widely prescribed, most studied, and most effective medical treatment for erectile dysfunction, with success rates typically reported between 60% and 80% depending on the underlying cause.
How PDE5 Inhibitors Work
During sexual arousal, the body releases a chemical called nitric oxide, which triggers the production of cyclic GMP (cGMP). This substance relaxes the smooth muscle in the penile blood vessels, allowing blood to flow in and produce an erection. An enzyme called PDE5 naturally breaks down cGMP, which is why the erection eventually subsides.
In men with ED, this process is impaired — either too little cGMP is produced, or PDE5 breaks it down too quickly. PDE5 inhibitor medications block the PDE5 enzyme, allowing cGMP to accumulate and sustain the blood flow needed for an erection.
A crucial point: PDE5 inhibitors do not cause an automatic erection. They only work in the presence of sexual arousal. Without stimulation, the medication has no visible effect. This is a common misconception that leads to disappointment when men take the tablet and then wait for something to happen without any sexual context.
Sildenafil (Viagra)
Sildenafil was the first PDE5 inhibitor to reach the market, originally developed by Pfizer and launched in 1998 as Viagra. The patent has since expired, and generic sildenafil is now widely available in the UK at a fraction of the original cost.
Key characteristics:
- Onset: Takes effect within 30 to 60 minutes.
- Duration: Effective for approximately 4 to 6 hours.
- Dosage: Available in 25mg, 50mg, and 100mg tablets. Most men start at 50mg.
- How to take it: On an empty stomach for fastest absorption. A heavy or fatty meal can delay onset by up to an hour.
- Best suited for: Men who want an on-demand treatment for planned sexual activity.
Sildenafil remains one of the most commonly prescribed ED treatments in the UK and is available over the counter in 50mg strength (branded as Viagra Connect) without a prescription, following a pharmacist consultation.
Tadalafil (Cialis)
Tadalafil, originally marketed as Cialis, is often called the “weekend pill” due to its significantly longer duration of action. Generic tadalafil is now widely available in the UK.
Key characteristics:
- Onset: Takes effect within 30 minutes to 2 hours.
- Duration: Effective for up to 36 hours.
- Dosage: Available in 10mg and 20mg for on-demand use, or 2.5mg and 5mg for daily use.
- How to take it: Can be taken with or without food (food has minimal impact on absorption).
- Best suited for: Men who prefer spontaneity and dislike the need to plan around taking a tablet, or men who are sexually active more than twice a week.
Daily Low-Dose Tadalafil
One of the most significant developments in ED treatment has been the option of daily low-dose tadalafil (2.5mg or 5mg taken once daily). Rather than taking a tablet before each sexual encounter, the daily dose maintains a steady level of the medication in your system, meaning you are always ready without needing to plan ahead.
This approach offers several advantages:
- Eliminates the need to time medication around sexual activity.
- Removes the psychological association between taking a pill and having sex.
- Can improve spontaneity and reduce performance anxiety.
- Also licensed for treatment of benign prostatic hyperplasia (enlarged prostate) symptoms.
Daily tadalafil is often preferred by men in regular relationships who want to restore a sense of normality to their sexual lives without the ritual of on-demand medication.
Other PDE5 Inhibitors
Two additional PDE5 inhibitors are available in the UK, though they are prescribed less frequently:
- Vardenafil (Levitra): Similar profile to sildenafil with onset in 25-60 minutes and duration of 4-5 hours. Some evidence suggests it may be slightly more effective in men with diabetes.
- Avanafil (Spedra): The newest PDE5 inhibitor, with a faster onset of action (as little as 15 minutes) and potentially fewer side effects. Can be taken with food.
Side Effects of PDE5 Inhibitors
PDE5 inhibitors are generally well tolerated, but they are not side-effect-free. Being honest about what you might experience helps set realistic expectations.
Common side effects (experienced by more than 1 in 10 men):
- Headache (the most frequently reported)
- Facial flushing
- Nasal congestion
- Indigestion or stomach discomfort
Less common side effects:
- Dizziness
- Visual disturbances (particularly a blue tinge to vision with sildenafil)
- Back pain or muscle aches (more common with tadalafil)
Side effects are typically mild and diminish with continued use as the body adjusts. If side effects are bothersome, switching to a different PDE5 inhibitor often helps, as individual response varies.
Important Safety Warnings
PDE5 inhibitors must not be taken alongside nitrate medications (such as GTN spray or isosorbide mononitrate, used for angina). The combination can cause a dangerous drop in blood pressure. They should also be used with caution in men with certain heart conditions, low blood pressure, or severe liver or kidney disease.
This is one of the key reasons why obtaining ED medication through a proper clinical assessment — rather than buying unregulated tablets online — is important. A clinician will check for contraindications before prescribing.
What If PDE5 Inhibitors Do Not Work?
Between 20% and 40% of men do not respond adequately to PDE5 inhibitors on their first attempt. However, non-response does not always mean the medication cannot work. Common reasons for apparent failure include:
- Not taking the medication correctly: Taking sildenafil on a full stomach, not waiting long enough for onset, or not providing adequate sexual stimulation.
- Incorrect dosage: Some men need the maximum dose to achieve a sufficient response.
- Insufficient attempts: Clinical guidance recommends trying a PDE5 inhibitor on at least 6-8 occasions before concluding it is ineffective, as response can improve with repeated use.
- Untreated underlying conditions: Uncontrolled diabetes, undiagnosed low testosterone, or ongoing heavy alcohol use can all blunt the medication’s effectiveness.
If PDE5 inhibitors genuinely prove ineffective after adequate trial, several second-line treatments are available.
Second-Line Treatments
Alprostadil Injections (Caverject / Viridal)
Alprostadil is a synthetic version of prostaglandin E1, which directly relaxes the smooth muscle of the penile blood vessels. Unlike PDE5 inhibitors, it does not require sexual arousal to work — the injection produces an erection regardless of stimulation.
The medication is injected into the side of the penis using a very fine needle. While the idea of penile injection understandably concerns many men, those who use it regularly report that the injection itself is largely painless and becomes routine quickly.
Effectiveness: Approximately 85% of men who do not respond to PDE5 inhibitors achieve satisfactory erections with alprostadil injections.
Risks: The main risk is priapism (a prolonged erection lasting more than four hours), which is a medical emergency. Proper dosing reduces this risk significantly, and patients are trained to use the correct technique and dose.
Alprostadil Urethral Pellets (MUSE)
For men who prefer to avoid injections, alprostadil is also available as a small pellet inserted into the urethra using a disposable applicator. It is generally less effective than the injection form but avoids the need for a needle.
Vacuum Erection Devices (Pumps)
A vacuum erection device consists of a plastic cylinder placed over the penis, connected to a pump that creates a vacuum. The negative pressure draws blood into the penis, producing an erection. A constriction ring is then placed at the base of the penis to maintain the erection after the pump is removed.
Vacuum devices are non-invasive, do not require medication, and have no systemic side effects. They are available on the NHS and can be effective when other treatments have failed or are contraindicated. The erection produced can feel slightly different from a natural one (the penis may feel cooler and slightly engorged beyond the ring), and some men and their partners find the device cumbersome. However, for men who cannot use medication, pumps provide a reliable mechanical solution.
Testosterone Replacement Therapy (TRT)
If blood tests confirm that your testosterone levels are clinically low (typically below 8 nmol/L, or between 8-12 nmol/L with symptoms), testosterone replacement therapy may be recommended. TRT can improve libido, energy, mood, and erectile function in men with genuine hypogonadism.
TRT is available as:
- Topical gels (applied daily to shoulders or abdomen)
- Intramuscular injections (every few weeks)
- Long-acting injections (every 10-14 weeks)
It is important to note that TRT is not a standalone ED treatment for men with normal testosterone levels. It is specifically indicated when low testosterone has been confirmed through blood testing and the symptoms align. When low testosterone is contributing to ED, correcting it can improve the response to PDE5 inhibitors and sometimes resolve the issue independently.
Psychological and Behavioural Approaches
For men whose ED is primarily or partly psychological in origin, talking therapies and behavioural interventions can be highly effective — either alone or alongside medication.
Cognitive Behavioural Therapy (CBT)
CBT helps identify and challenge the negative thought patterns and beliefs that drive performance anxiety and sexual avoidance. A therapist works with the individual (and sometimes the couple) to break the anxiety-ED cycle by restructuring unhelpful thoughts and gradually reintroducing positive sexual experiences.
Psychosexual Therapy
Psychosexual therapists specialise in the intersection of psychological and sexual health. Sessions may involve exploring the emotional and relational factors contributing to ED, developing communication strategies with a partner, and using structured exercises (such as sensate focus) to rebuild sexual confidence without the pressure of performance.
Referral to psychosexual therapy is available through the NHS in some areas, and private therapists are accessible across the UK. The College of Sexual and Relationship Therapists (COSRT) maintains a directory of accredited practitioners.
Couples Counselling
When relationship difficulties are contributing to ED, addressing the relational dynamic can be more productive than treating the erectile problem in isolation. Couples counselling provides a space for both partners to discuss the impact of ED openly and work towards a shared understanding.
Lifestyle Modifications: The Foundation of Long-Term Improvement
Medication can be transformative, but it works best when combined with lifestyle changes that address the underlying conditions contributing to ED. For some men — particularly those whose ED is mild and related to modifiable risk factors — lifestyle changes alone can restore adequate function.
Exercise
Regular aerobic exercise is one of the most evidence-backed lifestyle interventions for ED. A meta-analysis published in the British Journal of Sports Medicine found that men who engaged in moderate-to-vigorous physical activity had significantly lower rates of ED. Exercise improves cardiovascular function, reduces blood pressure, aids weight management, lowers cortisol, boosts testosterone, and improves mood. Pelvic floor exercises (Kegels) have also been shown to improve erectile function and ejaculatory control in some men.
Recommendation: At least 150 minutes of moderate aerobic activity per week, ideally including a mix of cardiovascular exercise and resistance training.
Diet
The Mediterranean diet — rich in fruits, vegetables, whole grains, olive oil, fish, and nuts — has the strongest evidence for improving erectile function among dietary patterns. A study published in The American Journal of Clinical Nutrition found that adherence to a Mediterranean diet was associated with a significantly lower risk of developing ED.
The mechanism is straightforward: a diet that supports cardiovascular health supports erectile function. Reducing processed food, excessive sugar, and saturated fat intake reduces inflammation, improves endothelial function, and supports healthy blood flow.
Weight Loss
For overweight or obese men, even modest weight loss can produce meaningful improvements in erectile function. A landmark Italian study found that approximately one-third of obese men with ED regained normal sexual function after losing 10% or more of their body weight through diet and exercise over two years — without medication.
Smoking Cessation
Quitting smoking allows the vascular system to begin recovering. Studies show that former smokers have significantly better erectile function than current smokers, with improvements detectable within months of cessation. The NHS Stop Smoking service provides free support across England, with equivalent services available in Scotland, Wales, and Northern Ireland.
Alcohol Reduction
Reducing alcohol intake to within the recommended 14 units per week can improve both acute sexual performance and long-term erectile health. Men who drink heavily and then reduce their intake often notice improvements in erection quality, libido, and general energy levels.
Sleep
Poor sleep quality and sleep disorders (particularly obstructive sleep apnoea) are independently associated with ED. Testosterone production peaks during deep sleep, and men who consistently get fewer than six hours of sleep per night tend to have lower testosterone levels. Prioritising sleep hygiene and seeking assessment for suspected sleep disorders can contribute to improved sexual function.
Treatments to Approach with Caution
The internet is awash with unregulated ED “treatments” of questionable safety and efficacy. A few words of caution:
- Unregulated online pharmacies: A significant proportion of ED medication purchased online from unregulated sources has been found by the MHRA to be counterfeit, containing incorrect doses, no active ingredient, or dangerous adulterants. Always obtain medication from a regulated pharmacy or registered online prescriber.
- Herbal supplements: Products marketed as “natural Viagra” or “herbal ED cures” are not regulated as medicines and may contain undeclared pharmaceutical ingredients at unpredictable doses. The evidence for herbal ED treatments is generally poor.
- Shockwave therapy: Low-intensity extracorporeal shockwave therapy (LiESWT) has shown some promise in early clinical trials for vascular ED, but it is not yet recommended by NICE or widely available through the NHS. More robust evidence is needed before it can be considered a mainstream treatment.
Choosing the Right Treatment: A Practical Framework
With so many options available, the decision can feel overwhelming. Here is a simplified framework for thinking about which treatment might suit your situation:
- Mild ED with modifiable risk factors (overweight, smoker, sedentary): Start with lifestyle changes. Consider adding a PDE5 inhibitor if needed.
- Moderate ED, primarily physical cause: PDE5 inhibitor (sildenafil or tadalafil) is usually the first step. Choose based on your preference for on-demand versus daily treatment.
- ED with strong psychological component: PDE5 inhibitor to break the anxiety cycle, combined with CBT or psychosexual therapy for longer-term resolution.
- ED with confirmed low testosterone: Testosterone replacement therapy, potentially combined with a PDE5 inhibitor.
- ED not responding to PDE5 inhibitors: Consider alprostadil injections, vacuum devices, or specialist referral.
Ultimately, the best ED treatment is the one that works for your specific situation, is medically safe for you, and fits into your life in a way you can sustain. A clinician experienced in ED management can help you navigate these decisions efficiently.
Getting Started with ED Treatment Through Evernu
If you are ready to take the next step, Evernu provides confidential, clinician-led assessments for men across England, Scotland, Wales, and Northern Ireland. Our service is regulated by the RQIA and staffed by qualified prescribers who specialise in men’s health.
The process is straightforward: complete a clinical questionnaire, have your case reviewed by a prescriber, and if appropriate, receive your treatment delivered discreetly to your door. No waiting rooms, no awkward conversations at a pharmacy counter — just evidence-based treatment from a regulated provider.
Start your confidential ED consultation with Evernu
ED is not something you have to live with, and treatment does not have to be complicated. The first step is the hardest. Everything after that gets easier.
Frequently Asked Questions
Which is better for ED: sildenafil or tadalafil?
Neither is objectively “better” — they suit different needs. Sildenafil works for 4-6 hours and is best for planned sexual activity. Tadalafil lasts up to 36 hours and offers more spontaneity. Daily low-dose tadalafil eliminates the need to plan altogether. Both have similar success rates. Many men try one and, if the fit is not right, switch to the other. Your clinician can help determine which is more appropriate based on your lifestyle and medical history.
Can I buy ED medication over the counter in the UK?
Sildenafil 50mg (branded as Viagra Connect) is available over the counter from pharmacies in the UK following a brief pharmacist consultation. All other ED medications require a prescription, which can be obtained from your GP or through a regulated online prescriber such as Evernu. We strongly advise against purchasing ED medication from unregulated websites, as counterfeit products are common and potentially dangerous.
How quickly do ED treatments start working?
PDE5 inhibitors typically work from the first dose: sildenafil within 30-60 minutes, tadalafil within 30 minutes to 2 hours, and avanafil in as little as 15 minutes. Daily tadalafil takes approximately 3-5 days to reach steady-state levels. Testosterone replacement therapy, where indicated, may take several weeks to months to show full effect. Lifestyle changes produce gradual improvement over weeks to months, depending on the specific change.
Is it safe to take ED medication every day?
Daily low-dose tadalafil (2.5mg or 5mg) is specifically licensed for daily use and has been extensively studied for long-term safety. It is considered safe for most men without contraindications. On-demand PDE5 inhibitors (sildenafil, higher-dose tadalafil) are intended for use as needed rather than daily, though taking them several times per week is common and considered safe for most men. Your prescriber will advise on the most appropriate regimen.
Will I need to take ED medication forever?
Not necessarily. If the underlying cause of your ED is addressed — for example, through weight loss, improved fitness, resolution of relationship issues, or effective management of depression — you may find that your erectile function improves to the point where medication is no longer needed, or is needed only occasionally. Some men use medication as a bridge while making lifestyle changes, and gradually reduce or discontinue use as their natural function recovers. Others find that ongoing treatment is needed, which is also perfectly acceptable.
