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Best ED Tablets UK: Compare Prices, Strengths and How to Order Safely Online

Published: 12 October 2026

Finding the best ED tablets UK means comparing effective, licensed treatments at transparent prices from a registered pharmacy. Erectile dysfunction affects millions of men in the UK, and oral medicines such as sildenafil (Viagra) and tadalafil (Cialis) have helped many regain confidence and intimacy [1]. At Cured Pharmacy (GPhC 9012511), you can access genuine prescription ED tablets from £0.45 per dose after a confidential online consultation reviewed by a UK prescriber.

What Are the Best ED Tablets Available in the UK?

The best ED tablets UK are phosphodiesterase type 5 (PDE5) inhibitors, a class of medicines licensed to treat erectile dysfunction by improving blood flow to the penis during sexual arousal [2]. The four oral PDE5 inhibitors available on UK prescription are sildenafil (Viagra), tadalafil (Cialis), vardenafil (Levitra), and avanafil (Spedra). Each works in a similar way but differs in how quickly it starts, how long it lasts, and how it fits into your lifestyle [3][4][5][6].

Sildenafil is the most widely used and cost-effective option, typically taken about one hour before sexual activity with effects lasting four to six hours [3]. Tadalafil can be taken on-demand (effects may last up to 36 hours) or as a lower daily dose for spontaneity [4]. Vardenafil and avanafil act more quickly—avanafil may work in as little as 15 to 30 minutes—making them suitable for men who prefer less planning [6][11]. All require sexual stimulation to work and do not increase desire; they simply make it easier to achieve and maintain an erection when aroused.

Choosing the best tablet depends on your health, other medicines, how often you have sex, and personal preference. A UK prescriber will review your medical history during an online consultation to recommend the safest and most suitable treatment for you.

How Do ED Tablets Work and What Strengths Are Available?

ED tablets work by blocking the enzyme PDE5, which breaks down a natural chemical (cyclic GMP) that relaxes smooth muscle in the penis [2]. When PDE5 is inhibited, cyclic GMP levels rise, blood vessels widen, and blood flow increases during sexual stimulation, making it easier to get and keep an erection. Because they rely on natural arousal, PDE5 inhibitors do not cause spontaneous erections or affect libido.

Sildenafil is available in 25 mg, 50 mg, and 100 mg tablets; most men start on 50 mg and adjust the dose if needed [3]. Tadalafil comes in 2.5 mg and 5 mg for daily use, or 10 mg and 20 mg for on-demand dosing [4]. Vardenafil is prescribed at 5 mg, 10 mg, or 20 mg, and avanafil at 50 mg, 100 mg, or 200 mg [5][6]. Your prescriber will choose the lowest effective dose, especially if you take other medicines or have conditions such as kidney or liver problems.

It is important never to take more than one dose in 24 hours or combine different ED tablets on the same day, as this increases the risk of side effects such as headache, flushing, dizziness, and dangerously low blood pressure.

On-Demand vs Daily Dosing

On-demand tablets (sildenafil 25–100 mg, tadalafil 10–20 mg, vardenafil, avanafil) are taken shortly before sex and suit men who are sexually active less than twice a week. Daily tadalafil (2.5–5 mg) is taken every day at the same time, allowing spontaneity without planning around a tablet [4]. Daily dosing may also help men with both ED and urinary symptoms from an enlarged prostate. Your prescriber will help you decide which regimen fits your lifestyle and health needs.

What Affects the Price of ED Tablets in the UK?

The price of ED tablets varies by active ingredient, brand, strength, and pack size. Generic medicines (sildenafil, tadalafil, vardenafil) are significantly cheaper than branded versions (Viagra, Cialis, Levitra) because the original patents have expired, but they contain the same active ingredient and meet the same UK quality standards [3][4][5]. At Cured Pharmacy, generic sildenafil starts from £0.45 per tablet, while branded Viagra Connect (a pharmacy medicine) costs from £5.75 per 50 mg tablet.

Tadalafil is priced from £7.95 for a pack of four 10 mg tablets, with larger packs offering better value per dose. Branded Cialis costs considerably more—four 10 mg tablets are £53.00—but some men prefer the original product. Vardenafil and avanafil are newer or less commonly prescribed, so prices are higher: vardenafil starts at £16.95 for four 5 mg tablets, and avanafil (Spedra) from £20.95 for four 50 mg tablets [6][11].

Buying larger quantities usually reduces the cost per tablet. For example, 64 tablets of sildenafil 25 mg cost £39.99 (62p each), compared with £0.45 for a single tablet. Always check that the pack size matches how often you use the medicine, as ED tablets have expiry dates and should be stored correctly.

Best ED Tablets UK: Price and Strength Comparison

To help you compare the best ED tablets UK, the table below shows the main treatments available at Cured Pharmacy, their strengths, how they are taken, and starting prices. All prescription medicines require an online consultation with a UK prescriber, while Viagra Connect and Cialis Together are pharmacy medicines available after a pharmacist assessment for men aged 18 and over.

Prices reflect the cost per pack, not per tablet, so check the pack size when comparing. Generic options offer the same clinical benefit as branded products at a fraction of the cost. Remember that the cheapest tablet is not always the best choice—your prescriber will recommend the treatment and dose that is safest and most effective for your individual circumstances.

Understanding Generic and Branded ED Medicines

Generic ED tablets contain the same active ingredient, strength, and dosage form as the branded original and are approved by the UK medicines regulator (MHRA) [12]. They work in exactly the same way but cost less because manufacturers do not have to repeat expensive clinical trials or invest in brand marketing. Branded medicines such as Viagra and Cialis were the first to market and remain popular, but generics like sildenafil and tadalafil are equally safe and effective [3][4]. At Cured Pharmacy, you can choose either option based on your preference and budget.

How to Order ED Tablets Safely Online in the UK

Ordering the best ED tablets UK online is safe and convenient when you use a registered pharmacy. Cured Pharmacy is registered with the General Pharmaceutical Council (GPhC 9012511) and operates in full compliance with UK medicines law. Every order for prescription ED tablets begins with a confidential online consultation: you answer health questions about your medical history, current medicines, and symptoms. A UK-registered prescriber (doctor or independent prescriber pharmacist) reviews your answers to ensure the treatment is safe and suitable for you.

If approved, your prescription is sent electronically to our pharmacy, where your medicine is dispensed and dispatched in discreet, unbranded packaging. Most orders arrive within one to three working days via Royal Mail or courier. If the prescriber decides an ED tablet is not safe for you—for example, because you take nitrates or have a condition that makes sexual activity inadvisable—they will explain why and may suggest seeing your GP for further assessment [1][2].

Never buy ED tablets from websites that do not require a consultation, offer medicines without a prescription, or are not registered with the GPhC. Counterfeit ED medicines are common online and may contain incorrect doses, harmful ingredients, or no active drug at all. Always check the GPhC register at www.pharmacyregulation.org to confirm a pharmacy is legitimate.

Who Can Take ED Tablets and Are There Any Risks?

Most men with erectile dysfunction can safely take PDE5 inhibitors, but they are not suitable for everyone. You must not take ED tablets if you use nitrate medicines for angina (such as GTN spray, isosorbide mononitrate, or isosorbide dinitrate), nicorandil, riociguat, or recreational drugs called poppers (amyl or alkyl nitrites), because the combination can cause a dangerous drop in blood pressure [3][4]. You should also avoid ED tablets if you have recently had a heart attack or stroke, have unstable angina, severe heart failure, very low blood pressure, or a history of sudden vision loss (non-arteritic anterior ischaemic optic neuropathy, or NAION) [2][12].

If you take alpha-blockers for an enlarged prostate or high blood pressure (such as tamsulosin, doxazosin, or alfuzosin), your prescriber will start you on the lowest dose of ED tablet and monitor for dizziness or fainting [3]. Some medicines that affect liver enzymes—such as ritonavir, cobicistat (in some HIV treatments), ketoconazole, itraconazole, and clarithromycin—can raise the level of ED tablets in your blood, requiring dose adjustments or making some PDE5 inhibitors unsuitable [3][4][5][6]. Always declare every medicine, supplement, and recreational drug you use during your consultation.

Common side effects include headache, facial flushing, indigestion, nasal congestion, and dizziness; these are usually mild and short-lived [3]. Seek urgent medical help if you have an erection lasting more than four hours (priapism), sudden loss of vision or hearing, or chest pain during sex. ED can be an early warning sign of heart disease or diabetes, so if you have new or worsening erection problems, see your GP for a full health check [1][2].

Can I Take ED Tablets with Other Medicines?

Many men take ED tablets safely alongside other medicines, but some combinations require caution or are not allowed. The prescriber or pharmacist checks every medicine you take during the online consultation. Blood pressure medicines, antidepressants, and drugs for diabetes are common and usually compatible, though your prescriber may adjust the ED dose or advise monitoring for side effects such as dizziness. For any medicine not listed in the clinical facts above, do not assume the combination is safe without professional advice—always disclose your full medication list, including over-the-counter products and herbal supplements like St John's wort, which can reduce the effectiveness of ED tablets [3][4].

Scientific References

1. NHS. (n.d.). Erectile dysfunction (impotence). NHS website. https://www.nhs.uk/conditions/erection-problems-erectile-dysfunction/ [accessed 12 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 12 October 2026]
3. Joint Formulary Committee. (n.d.). Sildenafil. British National Formulary. NICE. https://bnf.nice.org.uk/drugs/sildenafil/ [accessed 12 October 2026]
4. Joint Formulary Committee. (n.d.). Tadalafil. British National Formulary. NICE. https://bnf.nice.org.uk/drugs/tadalafil/ [accessed 12 October 2026]
5. Joint Formulary Committee. (n.d.). Vardenafil. British National Formulary. NICE. https://bnf.nice.org.uk/drugs/vardenafil/ [accessed 12 October 2026]
6. Joint Formulary Committee. (n.d.). Avanafil. British National Formulary. NICE. https://bnf.nice.org.uk/drugs/avanafil/ [accessed 12 October 2026]
7. National Institute for Health and Care Excellence. (2014). Erectile dysfunction: avanafil (ESNM45). https://www.nice.org.uk/advice/esnm45 [accessed 12 October 2026]
8. Electronic Medicines Compendium. (n.d.). Summaries of Product Characteristics and Patient Information Leaflets. https://www.medicines.org.uk/emc/ [accessed 12 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.