Viagra Tablet Quick Facts UK | Cured Pharmacy Guide

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Essential Viagra Tablet Quick Facts for UK Patients

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Pricing Disclaimer: Prices on some pages may not be up to date — the live pricing table below and pricing shown during consultation are official current prices and take precedence over any other figures on the site.

Sildenafil - UK-licensed prescription Treatment
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Sildenafil

From £0.45

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Tadalafil - UK-licensed prescription Treatment
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Tadalafil

From £9.99

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Sildenafil Eropid - UK-licensed prescription Treatment
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Sildenafil Eropid

From £8.99

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Tadalafil (Teva) - UK-licensed prescription Treatment
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Tadalafil (Teva)

From £9.99

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Avarante Tablets Tadalafil Tablets 10mg - UK-licensed prescription Treatment
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Avarante Tablets Tadalafil Tablets 10mg

From £11.49

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Viagra Connect 50mg - UK-licensed prescription Treatment
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Viagra Connect 50mg

From £11.49

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Essential Viagra Tablet Quick Facts for UK Patients

Understanding viagra tablet quick facts uk is essential before starting treatment for erectile dysfunction. Viagra (sildenafil citrate) has been licensed in the UK since 1998 and remains one of the most prescribed treatments for ED, with over 30 million men worldwide having used it safely under medical supervision [1]. At Cured Pharmacy, our UK-registered clinical team provides free consultations and genuine UK-licensed Viagra and sildenafil from £0.45 per tablet, subject to prescriber approval.

How Viagra Tablets Work in the Body

Viagra contains sildenafil citrate, a phosphodiesterase type 5 (PDE5) inhibitor that works by relaxing smooth muscle tissue in the blood vessels of the penis [1]. When a man is sexually aroused, nitric oxide is released in the penile tissue, which activates an enzyme called guanylate cyclase. This enzyme increases levels of cyclic guanosine monophosphate (cGMP), causing blood vessels to dilate and allowing increased blood flow to the penis.

PDE5 naturally breaks down cGMP, which can limit erectile function. Sildenafil blocks PDE5, allowing cGMP levels to remain elevated for longer periods, which helps achieve and maintain an erection sufficient for sexual activity [2]. It's crucial to understand that Viagra does not cause automatic erections — sexual stimulation is required for the medication to work effectively.

Clinical trials have demonstrated that sildenafil improves erectile function in approximately 70-80% of men with erectile dysfunction, with effects typically lasting 4-6 hours after administration [1][2]. The medication reaches peak plasma concentration approximately 60 minutes after oral administration, though this can be delayed if taken with high-fat meals.

Viagra Dosage Guide for UK Patients

In the UK, Viagra is available in three prescription strengths: 25mg, 50mg, and 100mg tablets. The standard starting dose recommended by NICE guidelines is 50mg, taken approximately one hour before anticipated sexual activity [3]. Your UK prescriber will determine the most appropriate dose based on your medical history, current medications, and response to treatment.

The 25mg dose is typically prescribed for men who may be more sensitive to the medication, those taking certain other medications that interact with sildenafil, or older patients. The 100mg dose may be prescribed if the 50mg dose proves insufficient, though dose escalation should only occur under medical supervision. Viagra should not be taken more than once per day, regardless of the dose prescribed.

For men who find the timing of on-demand Viagra inconvenient, daily low-dose alternatives like tadalafil may be more suitable. Unlike Viagra's 4-6 hour window, tadalafil can remain effective for up to 36 hours, offering greater spontaneity.

Adjusting Your Dose Safely

Never adjust your Viagra dose without consulting your prescriber. If you find the medication isn't working as expected, several factors may be responsible: insufficient sexual stimulation, taking the tablet with food (which delays absorption), psychological factors, or underlying health conditions that need addressing. Your UK clinical team at Cured Pharmacy can review your treatment during follow-up consultations and recommend dose adjustments or alternative treatments if appropriate.

Common Side Effects and Safety Information

The most frequently reported side effects of Viagra in clinical trials include headache (occurring in approximately 16% of men), facial flushing (10%), indigestion (7%), and nasal congestion (4%) [2]. These effects are generally mild to moderate and typically diminish with continued use as the body adjusts to the medication.

Visual disturbances, including a blue tinge to vision or increased light sensitivity, occur in approximately 3% of men taking sildenafil [2]. This happens because PDE5 inhibitors can also affect PDE6, an enzyme present in the retina. These visual changes are temporary and resolve once the medication leaves your system.

Serious side effects are rare but require immediate medical attention. These include priapism (an erection lasting more than 4 hours), sudden vision loss, sudden hearing loss, or symptoms of a serious allergic reaction. Men taking nitrate medications for angina must never take Viagra, as the combination can cause a dangerous drop in blood pressure [3].

Treatment Active Ingredient Duration of Action Starting Price
Sildenafil (generic) Sildenafil citrate 4-6 hours From £0.45
Viagra Connect Sildenafil citrate 50mg 4-6 hours From £11.49
Tadalafil (generic) Tadalafil Up to 36 hours From £9.99
Cialis (branded) Tadalafil Up to 36 hours From £53.00
Sildenafil Eropid Sildenafil citrate 4-6 hours From £8.99

Viagra vs Sildenafil: Understanding the Difference

Viagra is the brand name for sildenafil citrate, originally developed and marketed by Pfizer. When Pfizer's patent expired in 2013, other pharmaceutical manufacturers gained approval to produce generic versions containing the same active ingredient at identical doses. Generic sildenafil is bioequivalent to branded Viagra, meaning it works in exactly the same way with the same efficacy and safety profile [4].

The primary difference between branded Viagra and generic sildenafil is cost. At Cured Pharmacy, generic sildenafil is available from £0.45 per tablet, making it significantly more affordable than branded alternatives while delivering identical clinical results. Both versions require a prescription from a UK-registered prescriber and undergo the same rigorous MHRA quality standards.

Some patients prefer branded Viagra due to familiarity or tablet appearance, while others opt for generic sildenafil for cost savings. Your prescriber can help you choose based on your preferences and budget, though from a clinical efficacy standpoint, there is no therapeutic difference between the two.

Other ED Treatment Alternatives

Beyond sildenafil, UK patients have access to other PDE5 inhibitors including tadalafil (Cialis) and vardenafil. Tadalafil offers a longer duration of action (up to 36 hours) and can be taken as a low daily dose, while vardenafil has a similar profile to sildenafil but may work slightly faster in some men. Your clinical assessment will help determine which treatment best suits your lifestyle and medical needs.

When Viagra May Not Be Suitable

Certain medical conditions and medications make Viagra unsuitable or require careful medical supervision. Men taking nitrate medications (such as glyceryl trinitrate for angina) must not use Viagra under any circumstances, as the combination can cause life-threatening hypotension [3]. Similarly, men taking certain alpha-blockers for prostate problems or high blood pressure may require dose adjustments or alternative treatments.

Severe cardiovascular disease, recent stroke or heart attack (within the past 6 months), uncontrolled high or low blood pressure, and severe liver or kidney impairment may contraindicate Viagra use [3]. Men with hereditary degenerative retinal disorders, such as retinitis pigmentosa, should discuss the risks with their prescriber before starting treatment.

Your online consultation at Cured Pharmacy includes a thorough medical assessment to identify any contraindications. Our UK prescribers review your medical history, current medications, and health conditions to ensure Viagra is safe and appropriate for you. If Viagra isn't suitable, alternative treatments or referral to your GP for further investigation may be recommended.

How to Buy Viagra Safely Online in the UK

Purchasing erectile dysfunction medication 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), with superintendent pharmacist Tarun Kumar (GPhC 2233073) overseeing all clinical services and dispensing.

Our process is straightforward: complete a free online consultation that takes under 3 minutes, where you'll answer questions about your medical history, current medications, and symptoms. A UK-registered prescriber reviews your consultation within hours and, if appropriate, issues a prescription. Your medication is then dispensed by our UK pharmacy team and delivered in 100% discreet packaging, with prices shown upfront before you complete your consultation.

Beware of websites offering Viagra without a prescription or at prices that seem too good to be true. Counterfeit erectile dysfunction medications are widespread online, with studies showing that up to 77% of 'Viagra' purchased from unregulated websites contains incorrect doses, different active ingredients, or dangerous contaminants [4]. Always verify that any online pharmacy displays a GPhC registration number and requires a genuine medical consultation before dispensing prescription medications.

Why Choose Cured Pharmacy for ED Treatment

At Cured Pharmacy, we combine clinical excellence with competitive pricing and genuine UK-licensed medications. Our transparent pricing means you see the cost before your consultation, with no hidden fees. Our UK clinical team provides ongoing support, and all medications are sourced from licensed UK wholesalers and manufacturers, ensuring you receive genuine, safe treatments every time.

Scientific References

  1. 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. https://doi.org/10.1056/NEJM199805143382001
  2. Eardley, I., Ellis, P., Boolell, M., & Wulff, M. (2002). Efficacy and safety of sildenafil citrate in the treatment of men with mild to moderate erectile dysfunction. British Journal of Psychiatry, 181(3), 210-214. https://doi.org/10.1192/bjp.181.3.210
  3. National Institute for Health and Care Excellence. (2022). Erectile dysfunction: sildenafil. NICE British National Formulary. https://bnf.nice.org.uk/drug/sildenafil.html
  4. Jackson, G., Arver, S., Banks, I., & Stecher, V. J. (2010). Counterfeit phosphodiesterase type 5 inhibitors pose significant safety concerns. International Journal of Clinical Practice, 64(4), 497-504. https://doi.org/10.1111/j.1742-1241.2009.02328.x

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.

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Faq

How long does Viagra take to work?
Viagra typically takes 30-60 minutes to start working, with peak effectiveness around 1 hour after taking the tablet. Sexual stimulation is required for the medication to produce an erection.
Can I take Viagra with alcohol?
Small amounts of alcohol are unlikely to affect Viagra's efficacy, but excessive alcohol consumption can impair erectile function and increase the risk of side effects like dizziness and low blood pressure. Moderation is advised.
What's the difference between 50mg and 100mg Viagra?
The 100mg dose contains twice the active ingredient of the 50mg tablet and is typically prescribed when the lower dose proves insufficient. Your prescriber will determine the appropriate starting dose based on your medical assessment.
Does Viagra work for everyone with erectile dysfunction?
Clinical trials show Viagra improves erectile function in approximately 70-80% of men with ED, but effectiveness varies based on underlying causes, severity, and individual factors. Your prescriber can recommend alternatives if Viagra doesn't work for you.
Can I get Viagra without seeing a doctor in person?
Yes, Cured Pharmacy offers free online consultations with UK-registered prescribers who can assess your suitability for Viagra remotely. All prescription medications require clinical assessment, but this can be completed online in under 3 minutes.
Is generic sildenafil as good as branded Viagra?
Yes, generic sildenafil contains the same active ingredient at identical doses and is bioequivalent to branded Viagra, meaning it works exactly the same way with the same efficacy and safety profile.
What should I do if Viagra gives me a headache?
Headaches are a common side effect affecting about 16% of men taking Viagra and usually diminish with continued use. Over-the-counter paracetamol can help manage symptoms, but speak to your prescriber if headaches are severe or persistent.
How should I store Viagra tablets?
Store Viagra tablets at room temperature (below 30°C) in their original packaging, away from moisture and direct sunlight. Keep all medications out of reach of children and check expiry dates before use.
Tarun Kumar, Prescribing Pharmacist

Medically reviewed by

Tarun Kumar, Prescribing Pharmacist (GPhC 2233073)

Last reviewed: 17 July 2026