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Everything You Need to Know About Viagra Tablets in the UK

Published on: June 03, 2026

Viagra tablets remain one of the most widely prescribed treatments for erectile dysfunction in the UK, helping millions of men regain confidence and improve intimate relationships. As a UK-registered pharmacy with transparent pricing and expert clinical support, Cured Pharmacy offers genuine Viagra tablets from £9.19, with all treatments subject to a free online consultation with a UK prescriber. Understanding how these tablets work, their dosing options, and what to expect can help you make an informed decision about your treatment.

How Viagra Tablets Work for Erectile Dysfunction

Viagra tablets contain sildenafil citrate, a phosphodiesterase type 5 (PDE5) inhibitor that enhances blood flow to the penis during sexual stimulation [1]. By blocking the PDE5 enzyme, sildenafil allows smooth muscle relaxation in the penile arteries, facilitating an erection when sexually aroused. It's important to note that Viagra tablets do not cause spontaneous erections—sexual stimulation is required for the medication to work effectively.

Clinical trials have consistently demonstrated that sildenafil improves erectile function in approximately 70-80% of men with erectile dysfunction, regardless of underlying cause [2]. The medication typically begins working within 30 to 60 minutes of ingestion, with effects lasting up to four hours. This window allows for spontaneity while ensuring the treatment remains effective when needed. At Cured Pharmacy, our UK-registered prescribers assess your suitability during a confidential online consultation, ensuring Viagra tablets are appropriate for your individual health profile.

Viagra Tablets Dosage Options and Recommendations

Viagra tablets are available in three primary strengths: 25mg, 50mg, and 100mg. The standard starting dose recommended by UK prescribers is 50mg, taken approximately one hour before sexual activity [3]. Depending on efficacy and tolerability, your prescriber may adjust the dose to 25mg if you experience side effects, or increase to 100mg if the 50mg dose proves insufficient.

It's crucial to take Viagra tablets no more than once per day, as exceeding this frequency increases the risk of adverse effects without improving efficacy. Men taking certain medications—particularly nitrates for chest pain or alpha-blockers for prostate conditions—must avoid Viagra tablets due to potentially dangerous interactions. Our clinical team at Cured Pharmacy reviews your full medical history and current medications during the online assessment to ensure safe prescribing.

Timing and Food Interactions

While Viagra tablets can be taken with or without food, high-fat meals may delay absorption and reduce the speed of onset. For optimal results, consider taking the tablet on an empty stomach or after a light meal. Alcohol consumption should be limited, as excessive drinking can impair erectile function and diminish the effectiveness of sildenafil.

Common Side Effects of Viagra Tablets

Most men tolerate Viagra tablets well, but some experience mild to moderate side effects. The most frequently reported include headache, facial flushing, nasal congestion, and indigestion [4]. These effects are generally transient and resolve within a few hours as the medication is metabolised. Less common side effects include visual disturbances such as a blue tinge to vision or increased light sensitivity, which occur in a small percentage of users.

Serious adverse events are rare but require immediate medical attention. These include priapism (an erection lasting longer than four hours), sudden vision loss, or sudden hearing loss. If you experience chest pain during sexual activity after taking Viagra tablets, stop immediately and seek emergency care. Our superintendent pharmacist, Tarun Kumar (GPhC 2233073), and the clinical team at Cured Pharmacy ensure all patients receive comprehensive safety information before starting treatment.

Comparing Viagra Tablets with Generic Sildenafil

Viagra is the branded version of sildenafil citrate, originally developed by Pfizer. Since the patent expired, generic sildenafil has become widely available in the UK at significantly lower prices. Both Viagra tablets and generic sildenafil contain the same active ingredient in identical doses and are therapeutically equivalent [5]. The primary difference lies in branding, packaging, and cost.

At Cured Pharmacy, we offer both branded Viagra tablets from £9.19 and generic sildenafil from as low as £9.19, allowing you to choose based on preference and budget. Generic versions are manufactured to the same rigorous MHRA standards as the branded product, ensuring quality, safety, and efficacy. Many patients find generic sildenafil equally effective, while others prefer the reassurance of the original brand. Your prescriber can discuss both options during your consultation to help you make an informed choice.

Viagra Connect: Over-the-Counter Access

Viagra Connect 50mg is a reclassified version available without prescription in UK pharmacies for men aged 18 and over. However, a pharmacist consultation is still required to ensure suitability. At Cured Pharmacy, we offer Viagra Connect from £9.19, with the convenience of online assessment and discreet home delivery. This option suits men with straightforward erectile dysfunction who do not have underlying cardiovascular or metabolic conditions.

Who Should Avoid Viagra Tablets

Viagra tablets are not suitable for everyone. Men taking nitrate medications for angina or chest pain must not use sildenafil, as the combination can cause a dangerous drop in blood pressure [6]. Similarly, those using recreational drugs containing nitrates (such as poppers) should avoid Viagra tablets entirely. Alpha-blockers prescribed for benign prostatic hyperplasia or hypertension may also interact with sildenafil, requiring dose adjustments or alternative treatments.

Men with severe cardiovascular disease, recent stroke or heart attack, uncontrolled hypertension, or severe liver or kidney impairment may not be suitable candidates for Viagra tablets. Certain eye conditions, such as retinitis pigmentosa, also warrant caution. During your online consultation at Cured Pharmacy, our UK-registered prescribers carefully evaluate your medical history to ensure Viagra tablets are safe and appropriate for you.

Buying Viagra Tablets Safely Online in the UK

Purchasing Viagra tablets online offers convenience and discretion, but it's essential to use a legitimate UK-registered pharmacy. Cured Pharmacy is registered with the General Pharmaceutical Council (GPhC Registration Number 9012511), ensuring all medications are genuine, UK-licensed, and dispensed following a valid prescription from a UK prescriber. Counterfeit Viagra tablets sold through unregulated websites may contain incorrect doses, harmful substances, or no active ingredient at all [7].

Our transparent pricing model shows the cost of Viagra tablets upfront—from £9.19—before you complete the online consultation. New customers receive 20% off their first order with code Ednew, bringing the price down to £9.19. We offer discreet packaging and next-day delivery across the UK, with all treatments subject to clinical approval by our prescribing team. This ensures you receive safe, effective medication without compromising on quality or convenience.

Why Choose Cured Pharmacy for Viagra Tablets

Cured Pharmacy combines the lowest UK prices with expert clinical care and complete discretion. Our online consultation takes under three minutes, and our UK-registered prescribers review every assessment individually. We guarantee 100% discreet packaging, transparent upfront pricing, and genuine UK-licensed medicines only. Whether you choose branded Viagra tablets or generic sildenafil, you can trust our GPhC-registered service to deliver safe, effective treatment tailored to your needs.

Scientific References

1. Corbin, J. D., & Francis, S. H. (1999). Cyclic GMP phosphodiesterase-5: target of sildenafil. Journal of Biological Chemistry, 274(20), 13729–13732. [accessed 13 August 2026]
2. Goldstein, I., Lue, T. F., Padma-Nathan, H., Rosen, R. C., Steers, W. D., & Wicker, P. A. (1998). Oral sildenafil in the treatment of erectile dysfunction. New England Journal of Medicine, 338(20), 1397–1404. [accessed 13 August 2026]
3. British National Formulary. (2023). Sildenafil. BNF Online. London: BMJ Group and Pharmaceutical Press. [accessed 13 August 2026]
4. Morales, A., Gingell, C., Collins, M., Wicker, P. A., & Osterloh, I. H. (1998). Clinical safety of oral sildenafil citrate (Viagra) in the treatment of erectile dysfunction. International Journal of Impotence Research, 10(2), 69–74. [accessed 13 August 2026]
5. Hatzimouratidis, K., Amar, E., Eardley, I., Giuliano, F., Hatzichristou, D., Montorsi, F., Vardi, Y., & Wespes, E. (2010). Guidelines on male sexual dysfunction: erectile dysfunction and premature ejaculation. European Urology, 57(5), 804–814. [accessed 13 August 2026]
6. Webb, D. J., Freestone, S., Allen, M. J., & Muirhead, G. J. (1999). Sildenafil citrate and blood-pressure-lowering drugs: results of drug interaction studies with an organic nitrate and a calcium antagonist. American Journal of Cardiology, 83(5), 21–28. [accessed 13 August 2026]
7. Medicines and Healthcare products Regulatory Agency. (2021). Counterfeit medicines and devices. MHRA Guidance. London: UK Government. [accessed 13 August 2026]
8. NHS. (2026). Erectile dysfunction (impotence). https://www.nhs.uk/conditions/erection-problems-erectile-dysfunction/ Accessed 13 August 2026.

Information on this page is for educational purposes only and is not medical advice. All prescription treatments require clinical assessment by a UK-registered prescriber. Always consult a qualified healthcare professional before starting any new medication.