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Buy Viagra: Essential NHS Guidelines Checklist

Published on: June 03, 2026

When you buy Viagra online UK NHS guidelines require a clinical assessment by a UK prescriber before dispensing this prescription-only medication. At Cured Pharmacy, we've simplified the process with transparent pricing from £0.45, free online consultations completed in under 3 minutes, and genuine UK-licensed sildenafil and tadalafil treatments delivered discreetly to your door.

Understanding NHS Guidelines for Viagra Prescriptions

The NHS provides erectile dysfunction treatment on prescription for specific medical conditions including diabetes, prostate cancer, multiple sclerosis, spinal cord injury, and several other qualifying diagnoses [1]. Outside these criteria, NHS prescriptions for sildenafil (generic Viagra) are typically not available, meaning many UK patients access treatment through private prescriptions.

Whether you're eligible for NHS provision or seeking private treatment, UK regulations require a clinical assessment by a registered prescriber before any erectile dysfunction medication can be dispensed [2]. This assessment evaluates your medical history, current medications, cardiovascular health, and potential contraindications to ensure safe prescribing.

At Cured Pharmacy, our UK-registered clinical team conducts thorough online consultations that meet MHRA and GPhC standards. Superintendent pharmacist Tarun Kumar (GPhC 2233073) oversees all clinical protocols, ensuring every prescription is clinically appropriate and legally compliant.

How Sildenafil and Tadalafil Work for Erectile Dysfunction

Sildenafil (the active ingredient in Viagra) and tadalafil (found in Cialis) both belong to a class of medications called phosphodiesterase type 5 (PDE5) inhibitors [3]. These medications work by relaxing smooth muscle tissue in the blood vessels of the penis, increasing blood flow when sexually stimulated.

Clinical trials demonstrate that sildenafil improves erectile function in approximately 70-80% of men with erectile dysfunction across various underlying causes [3]. The medication typically takes effect within 30-60 minutes and remains active for 4-6 hours, making it suitable for planned sexual activity.

Tadalafil offers a different pharmacological profile with a significantly longer duration of action — up to 36 hours in clinical studies [4]. This extended window allows for more spontaneous intimacy without timing constraints, which many patients prefer for lifestyle reasons.

Choosing Between Sildenafil and Tadalafil

Your UK prescriber will consider several factors when recommending treatment, including your lifestyle preferences, frequency of sexual activity, other medications you take, and any cardiovascular considerations. Both medications are equally effective for most men, but individual response varies.

Some patients find sildenafil's shorter action window preferable for occasional use, while others benefit from tadalafil's flexibility for spontaneous intimacy. Lower-dose daily tadalafil is also an option for men who prefer continuous treatment rather than on-demand dosing.

Genuine UK-Licensed Medicines vs Counterfeit Risks

The MHRA estimates that up to 62% of erectile dysfunction medications purchased from unregulated online sources are counterfeit [5]. These products may contain incorrect doses, harmful contaminants, or no active ingredient whatsoever, posing serious health risks.

Cured Pharmacy sources all erectile dysfunction treatments exclusively from UK-licensed wholesalers, with full supply chain documentation and batch traceability. Every medication dispensed carries the appropriate PIL (patient information leaflet) and meets British Pharmacopoeia standards.

Our GPhC registration (9012511) means we operate under the same regulatory framework as high-street pharmacies, with regular inspections and quality assurance protocols. When you order from Cured Pharmacy, you're guaranteed genuine manufacturer-sealed medications, not grey-market imports or counterfeit products.

Sildenafil vs Tadalafil: Clinical Comparison

Both medications demonstrate excellent safety profiles in clinical use, with similar side effect patterns including headache, flushing, nasal congestion, and dyspepsia [3][4]. These effects are typically mild and transient, resolving without intervention.

The primary clinical difference lies in pharmacokinetics rather than efficacy. Sildenafil reaches peak plasma concentration in approximately one hour and has an elimination half-life of 3-5 hours. Tadalafil reaches peak concentration in two hours but maintains therapeutic levels for 17.5 hours, explaining its prolonged duration of action.

Drug interactions are similar for both medications, with significant contraindications including nitrate medications, riociguat, and certain alpha-blockers [2]. Your prescriber will review your current medications during consultation to identify any potential interactions.

Dosing Considerations

Sildenafil is typically prescribed at 50mg for initial treatment, with dose adjustment to 25mg or 100mg based on response and tolerability. Tadalafil on-demand dosing usually starts at 10mg, adjustable to 20mg or 5mg as needed.

For men who engage in sexual activity more than twice weekly, daily low-dose tadalafil (2.5mg or 5mg) may offer better quality of life than on-demand treatment. Your UK prescriber will discuss which dosing strategy best suits your circumstances.

Transparent Pricing and UK Online Pharmacy Standards

Cured Pharmacy displays all treatment prices upfront before you begin your consultation, with no hidden fees or subscription traps. Sildenafil starts from just £0.45 per tablet, offering exceptional value compared to typical market rates for this UK-licensed generic medication.

Our pricing model reflects efficient online operations and direct sourcing from UK-licensed wholesalers, allowing us to guarantee the lowest prices in the UK market. Unlike some providers who reveal costs only after consultation, we believe in complete transparency from your first visit.

Every order includes free online consultation with our UK-registered clinical team, discreet packaging with no external branding, and tracked delivery. Prescription treatments are dispensed only after approval by a UK prescriber, ensuring full compliance with MHRA regulations and GPhC standards.

Starting Treatment: What to Expect

The consultation process at Cured Pharmacy takes under 3 minutes to complete. You'll answer questions about your medical history, current medications, cardiovascular health, and specific symptoms. A UK prescriber reviews your responses, typically within hours during business days.

If treatment is clinically appropriate, your prescription is issued electronically and forwarded to our dispensing team. Medications are prepared in our GPhC-registered pharmacy and dispatched in plain, discreet packaging with no reference to pharmacy or treatment type on external labels.

Most patients receive their medication within 2-3 working days via Royal Mail tracked delivery. If you have questions after starting treatment, our clinical team remains available for ongoing support and advice throughout your treatment journey.

When to Seek Further Medical Review

While erectile dysfunction medications are generally well-tolerated, you should contact a healthcare professional if you experience chest pain during sexual activity, sudden vision or hearing loss, or an erection lasting more than 4 hours (priapism) [2].

If treatment proves ineffective after several attempts at the maximum dose, this may indicate underlying cardiovascular or hormonal issues requiring investigation by your GP or a specialist. Our prescribers can advise on appropriate next steps if first-line treatment doesn't achieve desired results.

Scientific References

1. National Institute for Health and Care Excellence. (2021). Erectile dysfunction: Assessment and management (NG161). NICE guideline. https://www.nice.org.uk/guidance/ng161 [accessed 13 August 2026]
2. Medicines and Healthcare products Regulatory Agency. (2022). Sildenafil and tadalafil: Summary of Product Characteristics. MHRA UK Public Assessment Report. [accessed 13 August 2026]
3. Goldstein, I., et al. (1998). Oral sildenafil in the treatment of erectile dysfunction. New England Journal of Medicine, 338(20), 1397-1404. https://doi.org/10.1056/NEJM199805143382001 [accessed 13 August 2026]
4. Brock, G. B., et al. (2002). Efficacy and safety of tadalafil for the treatment of erectile dysfunction: Results of integrated analyses. Journal of Urology, 168(4), 1332-1336. https://doi.org/10.1016/S0022-5347(05)64442-4 [accessed 13 August 2026]
5. Medicines and Healthcare products Regulatory Agency. (2020). Falsified medicines and devices. MHRA guidance on counterfeit medicines risks. https://www.gov.uk/guidance/falsified-medicines-and-devices [accessed 13 August 2026]
6. 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.