Sildenafil
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Our friendly team is available to help Monday to Friday 9:00am – 5:00pm.
If you need urgent assistance, do not use this service. Call 111, or in an emergency call 999.
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Get safe, clinically proven ED treatments prescribed by a UK-registered doctor. Start a quick online consultation today – no GP appointment needed.
Erectile dysfunction (ED) is when you regularly find it difficult to get or keep an erection firm enough for sex. It is a very common condition and can affect men of all ages, although it becomes more likely with age. ED can happen from time to time because of stress, tiredness, alcohol, or anxiety, but if it starts happening more often it may be a sign that treatment or further medical advice is needed. For a comprehensive understanding of ED see our complete guide to ED, it's causes, diagnosis and treatment,
Our clinicians may recommend one of the treatment options below, depending on your symptoms, medical history, and whether the treatment is appropriate for you.
| Treatment | How it works | Duration | Price from |
|---|---|---|---|
| Sildenafil (generic Viagra) | PDE5 inhibitor — increases penile blood flow | 4–6 hours | £8.99 |
| Tadalafil (generic Cialis) | PDE5 inhibitor — on-demand or daily dose | Up to 36 hours | £11.99 |
| Vardenafil (generic Levitra) | PDE5 inhibitor — can be taken with food | 4–6 hours | £16.99 |
| Spedra (Avanafil) | PDE5 inhibitor — fastest onset | 6 hours | £21.99 |
Not sure which option is right for you?
Speak to a clinician if your symptoms are persistent, worsening, or affecting your quality of life.
ED is surrounded by misconceptions that prevent men from seeking help. Here is what the clinical evidence actually says about some of the most widely believed myths.
False. While ED becomes more common with age, studies show that around 26% of new ED cases are in men under 40. Psychological causes such as performance anxiety and stress are particularly prevalent in younger men. Age is a risk factor, not a prerequisite.
While psychological factors play a role, the majority of ED cases in men over 40 have a physical component — most commonly impaired vascular function. ED is increasingly recognised as a marker of cardiovascular health. Dismissing it as "just stress" can mean missing a treatable underlying condition.
Psychology and EDPDE5 inhibitors like sildenafil and tadalafil do not cause automatic erections. They enhance the body's natural response to sexual stimulation by improving blood flow. Without arousal, they have no visible effect. They assist the erection process; they do not replace it.
What is Viagra?PDE5 inhibitors are safe for most men with cardiovascular disease and are well tolerated at standard doses. The main exception is men taking nitrate medications (such as GTN spray for angina) — combining the two can cause dangerous blood pressure drops. Your prescriber will screen for this during the consultation.
Erectile Dysfunction (ED) and heart diseaseED is a physiological condition caused by vascular, hormonal, or neurological factors — not a reflection of attraction or desire. Many men in long, happy relationships develop ED for entirely physical reasons. Treatment should be approached like any other medical condition, without shame or relationship implications.
Legitimate online pharmacies registered with the GPhC and using UK-registered prescribers provide the same quality of care as a GP consultation. Access Doctor is GPhC-registered (#9011198) and all prescriptions are issued by GMC-registered clinicians. The risk comes from unregulated websites selling unlicensed products — always check the pharmacy's GPhC registration.
Lifestyle changes can significantly improve erectile function and enhance the effectiveness of medication — some men find they need lower doses or less frequent use after addressing modifiable risk factors.
Exercise regularly — cardiovascular fitness matters most
Aerobic exercise (brisk walking, cycling, swimming) for at least 150 minutes per week significantly improves vascular function and erectile performance. A 2018 meta-analysis found that regular aerobic exercise reduced ED severity by the equivalent of one PDE5 inhibitor dose in moderate cases.
Stop smoking — it directly damages penile blood vessels
Smoking is one of the most significant modifiable risk factors for ED. It directly damages the endothelium (the lining of blood vessels), reducing penile blood flow. Men who stop smoking see measurable improvement in erectile function within weeks to months.
Reduce alcohol — particularly before sex
Alcohol is a central nervous system depressant that impairs the nerve signals needed for erection. While moderate alcohol does not cause long-term ED, heavy or regular drinking is a significant contributor. Limiting alcohol to NHS guidelines (14 units per week maximum) is advisable.
Manage stress and anxiety actively
Psychological triggers — particularly performance anxiety — are among the most common causes of ED in men under 40. Mindfulness, cognitive behavioural therapy (CBT), and open communication with a partner can all help break the anxiety cycle. Speak to your GP if stress or low mood is affecting multiple areas of your life.
Address weight and metabolic health
Obesity and metabolic syndrome (including type 2 diabetes and high cholesterol) are strongly associated with ED through impaired vascular function and reduced testosterone. Even modest weight loss — 5–10% of body weight — can produce significant improvements in erectile function.
Your common questions regarding erectile dysfunction
Once your consultation has been reviewed by our UK-registered prescribers , they will determine whether prescription treatment is clinically appropriate. Any authorised prescriptions are then dispensed by a GPhC-registered pharmacy and delivered securely. Completing a consultation does not guarantee that a prescription will be provided. Outcomes vary between individuals. The prescriber will consider the underlying cause before suggesting any treatment. Treatment options, alongside lifestyle changes, may help manage symptoms.
We offer a comprehensive range of clinically proven ED treatments, all available through our convenient online prescription service. Oral ED Medications (PDE5 Inhibitors) PDE5 inhibitors are the first-line treatment for erectile dysfunction. These medications work by increasing blood flow to the penis, making it easier to achieve and maintain an erection when sexually stimulated. Sildenafil (Viagra & Generic) Viagra - From £28.99 | Sildenafil Generic - From £8.99 Sildenafil is one of the most well-known and effective ED treatments available. Originally branded as Viagra, it's now available in affordable generic forms. How Sildenafil Works: Takes effect 30-60 minutes after taking Lasts up to 5 hours Works only when sexually aroused Should be taken on an empty stomach for best results Who Should Consider Sildenafil: Men seeking a reliable, well-established ED treatment Those looking for an affordable generic option Men who plan sexual activity and can take the tablet in advance Tadalafil (Cialis & Generic) Cialis - From £37.99 | Cialis Once a Day - From £68.99 | Tadalafil Generic - From £11.99 Tadalafil offers the longest duration of any ED medication, earning it the nickname "the weekend pill." How Tadalafil Works: Takes effect in 30 minutes Lasts up to 36 hours Can be taken with or without food Available as daily low-dose option for spontaneous intimacy Who Should Consider Tadalafil: Men who want maximum flexibility and spontaneity Those who prefer not to plan sexual activity precisely Men who are sexually active more than twice weekly (daily option) Vardenafil (Levitra & Generic) Levitra - From £37.99 | Vardenafil Generic - From £16.99 Vardenafil is particularly effective for men with diabetes and offers a slightly faster onset than sildenafil. How Vardenafil Works: Takes effect in 25-60 minutes Lasts up to 5 hours Works only with sexual stimulation Can be taken with low-fat meals Who Should Consider Vardenafil: Men with diabetes experiencing ED Those who want a faster-acting alternative to sildenafil Men seeking a balance of effectiveness and duration Avanafil (Spedra) Spedra - From £21.99 Avanafil is the newest PDE5 inhibitor and offers the fastest onset of action. How Avanafil Works: Takes effect in as little as 15-20 minutes Lasts up to 5 hours Works only when sexually stimulated Fewer side effects reported Who Should Consider Avanafil: Men who want the fastest-acting ED medication Those who have experienced side effects with other ED treatments Men seeking more spontaneous intimate encounters Comparing ED Medications Medication Onset Time Duration Price From Best For Sildenafil (Viagra) 30-60 min 4-5 hours £8.99 Cost-effective, proven treatment Tadalafil (Cialis) 30 min Up to 36 hours £11.99 Maximum spontaneity Vardenafil (Levitra) 25-60 min 4-5 hours £16.99 Effective with diabetes Avanafil (Spedra) 15-20 min 4-5 hours £21.99 Fastest-acting option
Vacuum Erection Devices (Penis Pumps) Vacuum erection devices create negative pressure around the penis, drawing blood into the erectile tissue. A constriction ring is then placed at the base to maintain the erection. Benefits: Non-invasive and drug-free Effective for many men Can be used alongside other treatments One-time purchase (no ongoing costs) Penile Injection Therapy For men who don't respond to oral medications, penile injections can be highly effective. Medications such as alprostadil (Prostaglandin E1), papaverine, or phentolamine are injected directly into the penis. How It Works: Medication is injected into the side of the penis Causes blood vessels to expand Creates an erection within 5-15 minutes Effective regardless of the cause of ED Considerations: Requires training from a healthcare provider May cause minor discomfort Risk of prolonged erection (priapism) if not used correctly Psychological Therapy and Sex Counselling When ED has psychological causes—such as stress, anxiety, performance pressure, or relationship issues—therapy can be highly effective. Types of Therapy: Cognitive behavioral therapy (CBT) Psychosexual counseling Couples therapy Mindfulness and relaxation techniques Even when physical causes are present, psychological support can improve outcomes and help both partners understand and manage the condition. Testosterone Replacement Therapy (TRT) Low testosterone levels can contribute to erectile dysfunction and reduced libido. If blood tests confirm low testosterone, replacement therapy may be prescribed. TRT Formats: Topical gels and creams Transdermal patches Intramuscular injections Subcutaneous pellets Testosterone therapy is only appropriate when deficiency is confirmed through blood tests and clinical assessment.
When non-surgical treatments are ineffective or unsuitable, surgical options may be considered: Penile Implants Penile implants are surgically inserted devices that allow men to achieve an erection on demand. There are two main types: Inflatable Implants : Consist of cylinders implanted in the penis, a pump placed in the scrotum, and a fluid reservoir. The pump transfers fluid to create an erection. Semi-Rigid Rods : Bendable rods inserted into the penis that can be positioned as needed. Considerations: High satisfaction rates among users Permanent solution Requires surgery and recovery time Only recommended after other treatments have failed Vascular Reconstructive Surgery In rare cases where ED is caused by blocked arteries, vascular surgery may be performed to restore blood flow. This is typically only considered in younger men with a clear arterial blockage.
Getting treatment for erectile dysfunction through Access Doctor is simple, confidential, and convenient. Step 1: Complete Our Online Consultation Our quick online consultation takes less than 2 minutes. You'll answer questions about: Your symptoms and medical history Current medications Overall health and lifestyle factors Previous ED treatments (if any) All information is kept completely confidential and secure. Step 2: UK Prescriber Review Your consultation will be reviewed by one of our UK-registered prescribers. They will assess whether prescription ED treatment is clinically appropriate for you. Important : Completing a consultation does not guarantee a prescription. Our prescribers consider your individual circumstances and may recommend lifestyle changes, alternative treatments, or advise you to see your GP if needed. Step 3: Pharmacy Dispensing & Delivery If a prescription is approved, it will be dispensed by our GPhC-registered pharmacy and delivered discreetly to your address. Delivery Options: Standard delivery (3-5 working days) Express delivery available Discreet, unmarked packaging
You should consult a healthcare provider if: You're experiencing persistent erectile difficulties ED is causing anxiety or affecting your relationship You have other symptoms alongside ED (chest pain, shortness of breath) You suspect a medication is causing ED Lifestyle changes haven't improved symptoms Important : Erectile dysfunction can be an early warning sign of cardiovascular disease. Don't ignore persistent symptoms.
Confidential & Discreet Your privacy is our priority. All consultations are confidential, and medications are delivered in plain, unmarked packaging. Convenient Online Service No need to visit a GP surgery or pharmacy in person. Complete your consultation from the comfort of your home. UK-Registered Prescribers Every consultation is reviewed by qualified UK healthcare professionals registered with the General Medical Council (GMC). GPhC-Registered Pharmacy Your prescription is dispensed by our General Pharmaceutical Council (GPhC) registered pharmacy, ensuring quality and safety. Trusted by Thousands Over 28,000 customers have trusted Access Doctor for their healthcare needs. Comprehensive Product Range We offer all major ED medications—branded and generic—so you can find the most suitable and affordable option. Fast, Discreet Delivery Receive your treatment quickly and discreetly, delivered directly to your door.
Do not take ED medications if you: Are taking nitrate medications for chest pain Have been advised to avoid sexual activity due to heart problems Have severe liver or kidney disease Have recently had a stroke or heart attack Have certain eye conditions (discuss with prescriber) Common side effects may include: Headache Facial flushing Indigestion Nasal congestion Dizziness Seek immediate medical attention if you experience: An erection lasting more than 4 hours (priapism) Sudden vision or hearing loss Chest pain during sexual activity Always read the patient information leaflet provided with your medication.
Don't let erectile dysfunction affect your confidence and relationships. Access Doctor makes it easy to access clinically proven treatments through our secure, confidential online service. Get started in 3 simple steps: Complete our quick 2-minute online consultation UK prescriber reviews your information Receive discreet delivery to your door Our experienced team is here to help you find the right treatment for your needs. Medical Disclaimer This information is for educational purposes and does not constitute medical advice. Always consult with a qualified healthcare provider regarding diagnosis and treatment. Completing an online consultation does not guarantee that a prescription will be provided—clinical appropriateness is assessed on an individual basis.
You get a private ED prescription through our online doctor service. After your consultation, if treatment is appropriate, a UK qualified clinicain prescribes the medicine. You pay for the medication and delivery – no hidden NHS charges. The prescription is handled entirely online.
Yes. Orders approved before 2pm Monday–Friday are dispatched the same day. Choose next‑day delivery at checkout (Royal Mail Tracked 24). Your medication arrives in discreet, unbranded packaging – no one knows what’s inside.
Absolutely. Our Viagra online consultation is conducted through a secure, GPhC‑registered platform. A UK doctor assesses your medical history, current medications, and suitability. You only receive Viagra (sildenafil) if it’s safe for you. This is legal, regulated, and safer than unlicensed websites.
We offer: Sildenafil (generic Viagra) Tadalafil (generic Cialis) Vardenafil (Levitra) Viagra Connect (available OTC after online consultation) Cialis Together (OTC) The clinician will recommend the best option based on your health profile.
Yes – 100% discreet packaging. The outer box has no pharmacy branding, no mention of ED or the medication name. Your privacy is guaranteed.
Not usually. Our online questionnaire covers everything our prescriber needs to know: your symptoms, general health, blood pressure (if known), and other medications. If our clincian needs more info (e.g., recent blood pressure reading), they will ask – but most men qualify without a face‑to‑face exam.
If Viagra or other ED pills are not suitable (e.g., due to heart conditions, nitrates, or very low blood pressure), the prescriber will explain why and may suggest alternative treatments (like a vacuum device or counselling). You will not be charged for an unsuitable prescription.
Order timeline: Complete consultation: 2 minutes Doctor review: typically within 2‑4 hours (priority for acute need) Dispatch: same day if approved before 2pm Delivery: next working day (Royal Mail Tracked 24)
Prices are comparable, sometimes lower because our overheads are smaller. However, the main benefit is convenience – no waiting rooms, no awkward conversations, and home delivery. You also get a full private prescription record.
The online consultation helps determine that. Our clinician will consider: How often you have ED (occasional vs. frequent) Other health conditions (diabetes, heart issues, prostate problems) Current medications Sildenafil (Viagra) works for 4‑6 hours. Tadalafil (Cialis) works up to 36 hours. The doctor will explain the difference before prescribing.
Helpful reads related to this treatment area.
Learn how Avanafil (Spedra) works, onset time, dosage, side effects, and UK prescribing guidance. Fast-acting ED treatment with onset in 15–30 minutes.
Learn how erectile dysfunction can signal heart disease, when Viagra is safe, the dangers of nitrates, and how cardiovascular risk affects ED treatment options.
Learn how vardenafil (Levitra) works, correct dosage, side effects, QT prolongation risks, contraindications, and how it compares with sildenafil and tadalafil. UK clinical guide from a GPhC-registered pharmacy.
Start a short online consultation and our clinical team will review whether treatment is suitable for you.