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Vardenafil (Vilitra) Guide: How It Works and How It Compares

Summary

A factual overview of Vardenafil (sold as Vilitra), how it compares with Sildenafil and Tadalafil, and what to know about onset and duration.

K4By Kam4eu Pharmacy TeamPharmacist-reviewed · Kam4eu medical content team

Reviewed by the Kam4eu Pharmacy Team on 18 June 2026 · Next review August 2027

What is Vardenafil (Vilitra)?

Vardenafil is a medicine used to treat erectile dysfunction (ED). Vilitra is one of the brand names under which Vardenafil is sold. Like Sildenafil and Tadalafil, it belongs to the group of medicines called PDE5 inhibitors, the most common class of oral ED treatments.

Its job is to help a man get and keep an erection when sexually aroused. It does not increase desire and does not produce an erection on its own; arousal is still needed for it to work.

How Vardenafil works

During arousal, the body releases signals that relax the smooth muscle in the penis and let blood flow in. An enzyme called PDE5 naturally breaks down one of the chemicals involved in this process. Vardenafil slows that enzyme down, which helps the blood vessels stay relaxed and supports a firmer, longer-lasting erection during sexual activity.

All PDE5 inhibitors share this basic mechanism. The practical differences between them come down to how quickly they take effect, how long they last, and how they interact with food and other medicines.

How it compares to Sildenafil and Tadalafil

Each option in this class has its own profile:

  • Sildenafil is the original and most familiar option. It typically takes effect within roughly an hour and lasts for a few hours, making it suited to planned activity. A heavy or fatty meal can slow it down.
  • Vardenafil is broadly similar to Sildenafil in onset and works over a comparable window. Some men find it suits them better, and it may be a little less affected by a moderate meal, though a high-fat meal can still delay it.
  • Tadalafil stands out for its much longer duration, which can stretch over a day or more. This makes it popular for those who prefer spontaneity rather than timing a dose closely around activity.

There is no single best choice. The most suitable option depends on how often you want to use it, your preference for spontaneity, how you respond, and your overall health. For a closer look at two of these, see our comparison of Tadalafil vs Sildenafil.

Onset and duration

With Vardenafil, the general pattern is:

  • It is taken a while before planned sexual activity, as set out in the patient leaflet.
  • Effects begin once it has been absorbed, usually within around an hour for many people.
  • It remains active for a number of hours, providing a window rather than a fixed moment.
  • A large, fatty meal beforehand may delay how quickly it starts.

Individual timing varies, so the leaflet and your doctor's or pharmacist's guidance should take priority over any general figures.

Safety and suitability

Vardenafil is not suitable for everyone. It should not be combined with nitrate heart medicines and may not be appropriate for people with certain heart conditions or those taking particular other drugs. Possible side effects can include headache, flushing, a blocked nose and dizziness.

To decide whether Vardenafil, Sildenafil or Tadalafil is the better fit, it helps to start with the full erectile dysfunction range and a conversation with a healthcare professional. Reading the patient information leaflet in full before use is important so you understand how to take it and what to watch for.

General information only — not medical advice. Always read the patient information leaflet and consult a doctor or pharmacist before starting any medication.

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