Sildenafil vs Vitaros: Which ED Treatment Is Right for You?

Sildenafil vs Vitaros: Comparing Oral and Topical Treatments for Erectile Dysfunction

Published: 17 October 2026

When comparing sildenafil vs Vitaros, you're looking at two very different approaches to treating erectile dysfunction: sildenafil is an oral tablet (the active ingredient in Viagra) that works throughout the body, while Vitaros is a prescription topical cream containing alprostadil applied directly to the tip of the penis [7]. Both are licensed in the UK and require a prescription, but they work through different mechanisms, suit different situations, and have distinct side-effect profiles.

How Sildenafil and Vitaros Work Differently

Sildenafil belongs to a class of medicines called PDE5 inhibitors [3]. After you swallow the tablet, it's absorbed into your bloodstream and works by relaxing blood vessels in the penis, making it easier to get and keep an erection when you're sexually aroused. Crucially, sildenafil doesn't cause an erection on its own—you still need sexual stimulation for it to work [1].

Vitaros, on the other hand, contains alprostadil, a synthetic version of a naturally occurring substance called prostaglandin E1 [7]. You apply a small amount of cream directly to the opening at the tip of the penis (the urethral meatus) about 5–30 minutes before sex. The alprostadil is absorbed locally and causes the blood vessels in the penis to widen, which can produce an erection even without sexual stimulation in some men, though arousal usually improves the response.

Because sildenafil works systemically (throughout the body), it can interact with other medicines and isn't suitable for men taking nitrates, nicorandil or riociguat [3]. Vitaros acts locally, so it has fewer drug interactions, but it can cause local irritation and may be absorbed by a partner during intercourse, which is an important consideration [7].

Onset of Action: How Quickly Do Sildenafil vs Vitaros Work?

Sildenafil typically starts working within 30–60 minutes, though many men are advised to take it about an hour before planned sexual activity [3]. Taking it on an empty stomach can speed up absorption; a high-fat meal may delay the effect by an hour or more. The response varies between individuals, and some men find it works a little faster or slower depending on factors like age, other health conditions, and what they've eaten.

Vitaros is generally faster: the cream is designed to work within 5–30 minutes of application [7]. Because it's applied directly to the site of action and absorbed through the urethra, it bypasses the digestive system entirely, so food and drink don't affect how quickly it works. This can be an advantage for men who want a more spontaneous option or who find planning an hour ahead difficult.

However, speed isn't everything. Some men prefer the predictability of sildenafil's one-hour window, which allows time for foreplay and a more natural build-up. Others value Vitaros's rapid onset, especially if spontaneity is important or if they've found oral tablets too slow in the past.

Planning Around Meals and Alcohol

With sildenafil, timing your dose around meals matters. A heavy, fatty meal can delay absorption, so if you're planning a romantic dinner, you might take the tablet before you eat or choose a lighter meal [3]. Alcohol in moderation is usually fine, but drinking heavily can make it harder to get an erection and may increase the risk of dizziness or low blood pressure.

Vitaros offers more flexibility here: because it's applied topically, what you eat or drink doesn't influence how well or how fast it works [7]. That said, heavy alcohol can still impair erectile function generally, so moderation is sensible whichever treatment you use.

Duration of Effect: How Long Do They Last?

Sildenafil's effects typically last around 4–6 hours [3]. This doesn't mean you'll have an erection for that long—rather, during that window, it's easier to get and maintain an erection when you're sexually aroused. After about 4–6 hours, the medicine is largely cleared from your system, and you'd need to take another dose (no more than once in 24 hours) if you wanted the effect again.

Vitaros has a shorter duration of action. The erection-enhancing effect generally lasts for the duration of sexual activity, but the medicine doesn't remain active in your system for hours afterwards [7]. If you want to have sex again later the same day, you would need to apply another dose, bearing in mind the maximum recommended frequency in the product information.

For some men, sildenafil's longer window is reassuring—it takes the pressure off precise timing and allows for a second attempt if the first doesn't lead to intercourse. For others, especially those who prefer a treatment that's only active when needed and doesn't linger, Vitaros's shorter, more targeted action may feel more appropriate.

Available Strengths and Dosing for Sildenafil vs Vitaros

Sildenafil is available in three strengths: 25 mg, 50 mg, and 100 mg [3]. Most men start on 50 mg, taken about an hour before sex, and the dose can be adjusted up to 100 mg or down to 25 mg depending on how well it works and whether side effects occur. The maximum is one dose in 24 hours. Men on certain other medicines (such as alpha-blockers or potent CYP3A4 inhibitors) usually start on the lowest dose, and the prescriber will check your full medication list during the consultation.

Vitaros comes as a single-dose applicator containing 300 micrograms of alprostadil in a cream base [7]. You apply the entire contents of one applicator to the opening of the urethra. There's no titration of dose in the same way as with tablets—each application delivers a fixed amount. The prescriber will explain the correct technique, as proper application is important for the cream to work effectively and to minimise the risk of passing the medicine to a partner.

If you're using a barrier method of contraception, it's worth noting that oil-based creams (though Vitaros is not oil-based, always check the product information) can sometimes affect latex condoms. Your prescriber or pharmacist can advise on compatibility and the need for your partner to avoid direct contact with the treated area until the cream has been absorbed [7].

Adjusting Treatment Over Time

With sildenafil, dose adjustment is straightforward: if 50 mg doesn't work well enough and you're not experiencing troublesome side effects, your prescriber may increase the dose to 100 mg [3]. If 50 mg works but causes side effects like headache or flushing, dropping to 25 mg might be an option.

Vitaros doesn't offer the same flexibility in dosing, as each applicator contains a fixed amount [7]. If it doesn't work adequately, the prescriber might consider switching to a different treatment rather than increasing the dose. Conversely, if you experience local irritation, there's no lower-dose option—you'd need to try a different approach altogether.

Side Effects: What to Expect with Each Treatment

Sildenafil's most common side effects are headache, facial flushing, indigestion, and nasal congestion [3]. These happen because the medicine relaxes blood vessels throughout the body, not just in the penis. Most side effects are mild and short-lived, fading as the drug leaves your system. A small number of men notice temporary changes in colour vision (a blue tinge) or increased sensitivity to light. Dizziness can occur, especially if you're also taking medicines for high blood pressure, so it's important to stand up slowly from sitting or lying.

Vitaros's side effects are mostly local: some men experience a burning or stinging sensation in the penis after application, and redness or irritation at the site is possible [7]. Because the medicine is absorbed through the urethra, partners may also experience genital irritation or itching if they come into contact with the cream before it's fully absorbed—using a condom can help prevent this. Systemic side effects (headache, dizziness) are less common with Vitaros than with oral PDE5 inhibitors, because much less of the drug enters the general circulation.

Rarely, any ED treatment can be associated with priapism—a painful erection lasting more than four hours—which requires urgent medical attention to prevent permanent damage [1][7]. Sudden loss of vision or hearing, though very rare, is another reason to seek immediate help. If you experience chest pain during sex, stop and call 999, as this may indicate a heart problem that needs urgent assessment.

Who Might Prefer Sildenafil vs Vitaros?

Sildenafil may suit you if you prefer the convenience of swallowing a tablet, you're comfortable planning about an hour ahead, and you want a treatment with a well-established track record—sildenafil has been used by millions of men worldwide since 1998 [9]. It's often the first-line treatment recommended by UK guidelines [2], and many men find the longer duration of action (4–6 hours) reassuring. Sildenafil is available in generic form at Cured Pharmacy from £0.45 per tablet (£0.36 with code Ednew on your first order), making it one of the most affordable ED treatments.

Vitaros might be a better fit if you've tried oral tablets and found them ineffective, slow, or associated with side effects you'd rather avoid [7]. It can also be an option for men who have difficulty swallowing tablets, or who take medicines that interact with PDE5 inhibitors (such as nitrates for angina). The faster onset and local action appeal to some men, though the application technique requires a bit of practice and comfort with handling the genital area. Vitaros is prescription-only and not currently stocked at Cured Pharmacy, so you would need to obtain it from another provider or your GP.

Neither treatment is right for everyone. Some men find that combining lifestyle changes—such as losing weight, exercising more, cutting down on alcohol, and stopping smoking—improves erectile function enough that medication becomes less necessary [1]. Others may need to try a different PDE5 inhibitor (such as tadalafil, vardenafil, or avanafil) or explore other options like vacuum devices or, in specific cases, alprostadil injections. A consultation with a prescriber will help identify the most suitable treatment for your individual circumstances.

When to See Your GP

If you're experiencing erectile dysfunction for the first time, it's worth seeing your GP before starting any treatment [1]. ED can be an early warning sign of cardiovascular disease or diabetes, and your doctor can check your blood pressure, blood sugar, and cholesterol, as well as review any medicines you're taking that might be contributing to the problem.

Your GP can also discuss whether ED might be linked to psychological factors—such as stress, anxiety, or relationship difficulties—in which case talking therapy or counselling might be helpful alongside or instead of medication [2]. Even if you go on to use an online service like Cured Pharmacy for convenience, that initial GP assessment is valuable for your overall health.

Scientific References

1. NHS. (n.d.). Erectile dysfunction (impotence). NHS website. https://www.nhs.uk/conditions/erection-problems-erectile-dysfunction/ [accessed 17 October 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 17 October 2026]
3. Joint Formulary Committee. (n.d.). Sildenafil. British National Formulary. NICE. https://bnf.nice.org.uk/drugs/sildenafil/ [accessed 17 October 2026]
4. Joint Formulary Committee. (n.d.). Alprostadil. British National Formulary. NICE. https://bnf.nice.org.uk/drugs/alprostadil/ [accessed 17 October 2026]
5. 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://pubmed.ncbi.nlm.nih.gov/9580646/ [accessed 17 October 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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