The price of Sildenafil: What does it cost and how do you get a fair deal safely? 

DoktorABC editorial team

Accurate, up-to-date health information written by our editorial team and reviewed by UK-registered prescribers.

Prices quoted in this article are approximate ranges based on current UK market data. They are subject to change and should be verified directly with your chosen provider before purchasing.

NHS vs Private: The two main routes and their costs

The most significant price difference in sildenafil access is between NHS and private prescriptions.

NHS prescription: Generic sildenafil is available on the NHS for erectile dysfunction where it meets prescribing criteria. In England, the standard NHS prescription charge applies, currently £9.90 per item regardless of the quantity or dose supplied. Prescriptions are free in Scotland, Wales, and Northern Ireland for eligible patients, and free in England for men who qualify for exemption (for example, those over 60 or with certain medical conditions).

For men who qualify for NHS prescribing, this is by far the most cost-effective route. A month's supply of sildenafil at the standard prescription charge is significantly cheaper than any private option.

Private prescription: Men who do not qualify for an NHS prescription, want to keep it discreet, or who prefer the convenience of an online clinic, will pay market rates for sildenafil. Private costs are higher but have fallen substantially since generic sildenafil became available, and the market is competitive.

Sildenafil 50 mg price

50 mg is the standard starting dose for most men and the most widely prescribed strength. It is also the dose available without prescription as Viagra Connect, which affects its pricing at the pharmacy counter.

As a general guide for UK private pricing:

• Generic sildenafil 50 mg: Typically £1 to £3 per tablet from regulated online pharmacies, with lower per-tablet costs for larger pack sizes
• Viagra Connect 50 mg (OTC): Typically £5 to £8 per tablet from pharmacies, reflecting the branded premium and OTC convenience
• Branded Viagra 50 mg: Significantly more expensive than generic; typically £10 to £20 per tablet on private prescription

The difference between generic sildenafil and branded Viagra at the same dose is purely a matter of cost and packaging. The clinical effect is identical.

Sildenafil 100 mg price

The 100 mg dose is the maximum licensed strength and is available on private prescription only (not as an OTC option).

As a general guide for UK private pricing:

• Generic sildenafil 100 mg: Typically £1.50 to £4 per tablet from regulated online pharmacies, with lower per-tablet costs for larger pack sizes
• Branded Viagra 100 mg: Typically £15 to £25 per tablet on private prescription

The per-tablet cost of generic sildenafil at 100 mg is not significantly higher than at 50 mg, making it a cost-effective option for men for whom the higher dose is clinically appropriate.

Why generic sildenafil is so much cheaper than Viagra

The dramatic price difference between generic sildenafil and branded Viagra comes down to patent law and market competition, not quality.

When Pfizer developed Viagra, they held an exclusive patent giving them the sole right to manufacture and sell the medicine for a defined period. During that time, Viagra commanded a premium price. When the UK patent expired in 2013, other manufacturers were permitted to produce sildenafil under the generic name, and competition between manufacturers drove prices down rapidly.

Generic sildenafil must meet the same MHRA regulatory standards as the branded version, demonstrating bioequivalence before receiving approval. A cheaper generic tablet is not a lower quality tablet; it is the same medicine made by a different manufacturer at a lower cost.

Online clinic pricing: What is included and what to watch for

Private online clinics typically charge for sildenafil as part of a service that includes a medical assessment, prescription, dispensing, and delivery. This means the per-tablet cost is not always directly comparable to a pharmacy price for the tablet alone.

• When evaluating online clinic pricing, it is worth checking:
• Whether the consultation fee is included in the quoted price or charged separately
• Whether delivery is included or added at checkout
• Whether the provider offers subscription or repeat prescription pricing, which often reduces the per-tablet cost for ongoing treatment
• What clinical support is included, such as access to a prescriber for follow-up questions or dose review

The most affordable online option is not always the best value. A slightly higher price that includes a genuine medical assessment, responsive clinical support, and reliable delivery from a GPhC-registered pharmacy is worth more than a lower headline price with limited oversight.

Is cheap sildenafil safe to buy?

This depends entirely on where you buy it. Genuine generic sildenafil from a GPhC-registered UK pharmacy is safe, regulated, and clinically equivalent to branded Viagra. The low price reflects market competition, not compromised quality.

The risk comes from unregulated sources. Counterfeit erectile dysfunction medicines are among the most commonly seized fake medicines in the UK, and they present a genuine safety risk.

Counterfeit sildenafil tablets may contain incorrect doses, harmful substances, or no active ingredient at all. Always verify that your provider displays the GPhC internet pharmacy logo and that clicking it links directly to their entry on the GPhC register at gphc.org.uk.

Red flags that suggest an online pharmacy may not be legitimate:

• No requirement for a medical questionnaire or prescriber review
• Prices significantly below the market range
• No GPhC logo, or a logo that does not link to the register
• No UK contact address or customer service details
• Payment by bank transfer only

How to get sildenafil at a fair price safely

The following steps help ensure you are getting genuine, regulated sildenafil at a reasonable cost.

• Check NHS eligibility first. Speak to your GP about whether you qualify for NHS sildenafil before going private. The NHS prescription charge is significantly lower than private market pricing for most men.
• Use a GPhC-registered provider. Verify any online pharmacy at gphc.org.uk before placing an order.
• Compare total cost, not just headline price. Factor in consultation fees, delivery, and any ongoing subscription terms.
• Be cautious of prices well below the market range. Genuine generic sildenafil is already affordable; prices that seem too good to be true often are.
• Ensure a medical assessment is required. Any legitimate provider will require you to complete a health questionnaire reviewed by a UK-registered prescriber before issuing a prescription.
• Report suspected counterfeit products to the MHRA via the Yellow Card scheme at yellowcard.mhra.gov.uk.

DoktorABC connects UK patients with licensed prescribers and GPhC-registered pharmacies for private ED treatment, with a full medical assessment completed online.

Final thoughts

Sildenafil is one of the most cost-effective prescription medicines available in the UK, and the gap between NHS and private pricing has narrowed considerably since generics entered the market. The key is accessing it through a regulated, legitimate channel, whether that is your GP, a registered pharmacist, or a GPhC-registered online clinic.

Price should never be the sole deciding factor. A medical assessment before starting sildenafil is not optional; it is what ensures the medicine is appropriate for your circumstances and used safely.

FAQ

The DoktorABC medical advisory board

Dr. Roland Ruiken

Medical advisor, Norway

Dr. Viktor Simunovic

Medical advisor, Croatia

To the medical advisory board