Sildenafil Viatris - from £0.36 per tablet

Sildenafil Viatris: Price, Strengths and How to Order Safely in the UK

Published: 7 November 2026

Sildenafil viatris is a generic version of Viagra used to treat erectile dysfunction (ED) in men. Like other sildenafil products, it is available in the UK in 25 mg, 50 mg and 100 mg strengths, and is supplied only on prescription after a clinical assessment by a UK-registered prescriber. At Cured Pharmacy, generic sildenafil starts from £0.36 per tablet for first-time customers using code Ednew.

What is sildenafil viatris and how is it supplied?

Sildenafil viatris is a generic sildenafil product manufactured by Viatris, a global pharmaceutical company. It contains the same active ingredient as branded Viagra—sildenafil citrate—and works in the same way to help men achieve and maintain an erection when sexually aroused [3].

Sildenafil viatris is supplied as film-coated tablets in three strengths: 25 mg, 50 mg and 100 mg. The usual starting dose is 50 mg, taken approximately one hour before sexual activity, and the dose can be adjusted based on effectiveness and tolerability [3]. The maximum recommended dose is 100 mg, and you should not take sildenafil more than once in 24 hours.

All sildenafil products, including sildenafil viatris, are prescription-only medicines in the UK. This means you need a consultation with a prescriber who will review your medical history, current medications and suitability before issuing a prescription. At Cured Pharmacy, this is done through a simple online consultation reviewed by a UK-registered prescriber.

Sildenafil tablets should be swallowed whole with water. They can be taken with or without food, although a high-fat meal may delay the onset of action. Sexual stimulation is required for the medicine to work—sildenafil does not cause an erection on its own [3].

Sildenafil viatris price: what affects the cost?

The price of sildenafil viatris and other generic sildenafil products can vary depending on the manufacturer, the strength, the quantity ordered and the pharmacy supplying it. Generic versions are typically much more affordable than branded Viagra because they do not carry the same development and marketing costs [3].

At Cured Pharmacy, generic sildenafil (which includes products from manufacturers such as Viatris, Teva and others) starts from £0.45 per tablet, or £0.36 per tablet for first-time customers using the discount code Ednew. This represents a saving of 20% on your first order.

Several factors influence the price you pay. Larger pack sizes often offer better value per tablet. The strength of the tablet (25 mg, 50 mg or 100 mg) may also affect the price, although many pharmacies price all strengths the same. Branded products such as Viagra are significantly more expensive—£37.95 at Cured Pharmacy (£30.36 with code Ednew)—because you are paying for the brand name rather than any difference in the active ingredient.

When comparing prices, it is important to check that the pharmacy is registered with the General Pharmaceutical Council (GPhC) and that a qualified prescriber reviews your consultation. The cheapest option is not always the safest if proper clinical checks are not in place.

How does sildenafil viatris compare to other ED treatments?

Sildenafil viatris belongs to a class of medicines called PDE5 inhibitors, which also includes tadalafil (Cialis), vardenafil (Levitra) and avanafil (Spedra). All of these medicines work by increasing blood flow to the penis during sexual stimulation, but they differ in how quickly they work and how long their effects last [1][2].

Sildenafil typically takes effect within 30 to 60 minutes and lasts for around four to six hours. Tadalafil, by contrast, can be taken on-demand (working within 30 minutes and lasting up to 36 hours) or as a daily low-dose tablet. Vardenafil works similarly to sildenafil, while avanafil is the fastest-acting option, taking effect in as little as 15 to 30 minutes [6].

The choice between these treatments depends on your lifestyle, how spontaneous you want to be, and how your body responds to each medicine. Some men prefer the longer window offered by tadalafil, while others find sildenafil or avanafil more convenient. Your prescriber will discuss which option is most suitable for you during your consultation.

Generic versions of all these medicines are available and are clinically equivalent to their branded counterparts. For example, generic sildenafil (including sildenafil viatris) contains the same active ingredient and works in the same way as branded Viagra, but at a fraction of the cost.

Is sildenafil viatris as effective as branded Viagra?

Yes. Sildenafil viatris and other generic sildenafil products contain the same active ingredient (sildenafil citrate) in the same strength as branded Viagra. They are required by UK and European medicines regulators to demonstrate bioequivalence, meaning they are absorbed and work in the body in the same way [3].

Generic medicines must meet the same strict quality, safety and efficacy standards as branded products. The main difference is the name and the price—generic sildenafil is significantly cheaper because the manufacturer does not need to recover the original research and development costs.

Who can take sildenafil viatris and who should avoid it?

Sildenafil viatris is licensed for men aged 18 and over who have erectile dysfunction. It is not suitable for women or children. Before prescribing sildenafil, your prescriber will check your medical history to ensure it is safe for you [3].

You must not take sildenafil viatris if you are taking nitrates (such as GTN spray, isosorbide mononitrate or isosorbide dinitrate) for angina, or nicorandil, riociguat, or recreational drugs known as 'poppers' (amyl or alkyl nitrites). The combination can cause a dangerous drop in blood pressure [3].

Sildenafil is also not suitable if you have had a recent 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). Men with certain inherited retinal disorders should also avoid PDE5 inhibitors [3].

If you take alpha-blockers (such as doxazosin or tamsulosin) for an enlarged prostate or high blood pressure, you may still be able to use sildenafil, but you should be stable on the alpha-blocker and start on the lowest dose of sildenafil. Your prescriber will check this during your consultation [3].

Certain medicines that affect liver enzymes—such as ritonavir, cobicistat, ketoconazole, itraconazole and clarithromycin—can increase sildenafil levels in the blood, so a lower dose may be needed. Conversely, medicines like rifampicin, carbamazepine, phenytoin and St John's wort can reduce the effectiveness of sildenafil [3].

Can I take sildenafil viatris with other blood pressure medicines?

Sildenafil can lower blood pressure slightly, so if you are already taking blood pressure medicines, there is a risk of dizziness or light-headedness, especially when standing up. This does not mean you cannot take sildenafil, but your prescriber needs to know about all your current medicines so they can assess whether it is safe and advise on the appropriate dose [3].

You must declare all your current medicines—prescription, over-the-counter and herbal—during your online consultation. Do not stop or change any prescribed medicine without speaking to your GP or prescriber first.

How to order sildenafil viatris safely online

At Cured Pharmacy, ordering sildenafil viatris or any other ED treatment is straightforward and confidential. You start by completing an online consultation, which asks about your symptoms, medical history, current medications and lifestyle. This information is reviewed by a UK-registered prescriber (a doctor or pharmacist independent prescriber) who will decide whether sildenafil is safe and suitable for you [2].

If your consultation is approved, your prescription is sent to our GPhC-registered pharmacy (GPhC 9012511), and your medicine is dispensed and posted to you in discreet, unbranded packaging. Most orders are dispatched the same day if approved before the cut-off time, and delivery is free on orders over a certain value.

It is important to use a registered online pharmacy. Check that the pharmacy displays its GPhC registration number on its website and that a qualified prescriber reviews every consultation. Avoid websites that offer to sell prescription medicines without any health questions—these are illegal and potentially dangerous.

First-time customers at Cured Pharmacy can save 20% on their first order by using the discount code Ednew at checkout. This brings the price of generic sildenafil down to £0.36 per tablet, making it one of the most affordable options available in the UK.

If you have not been diagnosed with ED before, or if your symptoms are new or worsening, you should see your GP for a face-to-face assessment. ED can be an early warning sign of cardiovascular disease or diabetes, so it is important to identify and treat any underlying causes [1][2].

Side effects and when to seek urgent help

Like all medicines, sildenafil viatris can cause side effects, although not everyone experiences them. The most common side effects include headache, flushing (redness of the face), indigestion, nasal congestion and dizziness. These are usually mild and short-lived [3].

Less common side effects include visual disturbances (such as a blue tinge to vision or increased sensitivity to light), nausea, vomiting, rash and back pain. If you experience any side effects that are severe or persistent, speak to your GP or pharmacist [3].

You should seek urgent medical help if you experience an erection that lasts longer than four hours (priapism), sudden loss of vision in one or both eyes, or sudden decrease or loss of hearing. These are rare but serious side effects that require immediate attention [3].

If you develop chest pain during or after sexual activity, stop and seek medical advice. Do not take nitrates (such as GTN spray) if you have used sildenafil in the past 24 hours, as this can cause a dangerous drop in blood pressure. Tell the healthcare professional that you have taken sildenafil [3].

Most men tolerate sildenafil well, and serious side effects are uncommon. Your prescriber will assess your individual risk during your consultation and advise you on what to watch out for.

What should I do if sildenafil viatris does not work for me?

If sildenafil does not work the first time, do not give up. It can take several attempts to find the right dose and timing. Make sure you are taking it on an empty stomach or after a light meal, and allow at least an hour before sexual activity. Remember that sexual stimulation is essential—sildenafil will not cause an erection without it [3].

If sildenafil is still not effective after several attempts, speak to your prescriber. They may suggest increasing the dose (up to a maximum of 100 mg), trying a different PDE5 inhibitor such as tadalafil or avanafil, or investigating other underlying causes of ED. Your GP can arrange tests to check for conditions such as diabetes, high cholesterol or low testosterone [2].

Scientific References

1. NHS. (n.d.). Erectile dysfunction (impotence). NHS website. https://www.nhs.uk/conditions/erection-problems-erectile-dysfunction/ [accessed 7 November 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 7 November 2026]
3. Joint Formulary Committee. (n.d.). Sildenafil. British National Formulary. NICE. https://bnf.nice.org.uk/drugs/sildenafil/ [accessed 7 November 2026]
4. Joint Formulary Committee. (n.d.). Avanafil. British National Formulary. NICE. https://bnf.nice.org.uk/drugs/avanafil/ [accessed 7 November 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.

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