Vardenafil vs Cialis vs Viagra: What the Names Actually Mean
Vardenafil, Cialis and Viagra are not six options disguised as three.
Cialis is the brand name for tadalafil, while vardenafil is the active medicine also sold under the brand name Levitra. So the real comparison is tadalafil against vardenafil, alongside sildenafil where relevant.
This page is for adults in the UK who want clear, accurate information before using an online consultation or pharmacy service for erectile dysfunction treatment.
Searches that mix generic and brand names are completely understandable, but they can make it seem as though there are more treatment options than there really are. Here we sort out what each name refers to, explain the difference between brand and generic naming, and compare the medicines on the points that usually matter: UK availability, how long they last, and how they are typically taken.
The Short Answer: Three Medicines, Not Six
Vardenafil, Cialis and Viagra are names for three separate medicines, each belonging to the same class.
Vardenafil is a generic name, and its own brand name is Levitra. Cialis is a brand name for tadalafil. Viagra is a brand name for sildenafil.
When these three terms appear together in a search, they point at three medicines, not an open-ended list of alternatives.
Why the Names Get Confusing
Generic Names Versus Brand Names
Every medicine has a generic name, which describes the active ingredient itself, and often a brand name too, used by a specific manufacturer to market a particular product.
Vardenafil is the generic name of the active ingredient, while Levitra is a brand name for it. Similarly, tadalafil is the generic name behind Cialis, and sildenafil is the generic name behind Viagra.
Search behaviour naturally mixes these up. Someone might know one medicine by its brand name because that is what they have seen advertised, and know another by its generic name because that is what appeared on a prescription.
Why This Matters Practically
Understanding that these are naming differences, not different medicines, changes how you should approach comparing them.
The genuine comparison is between three active ingredients, rather than between an expanding list of brand and generic terms that sound different but describe the same handful of options.
A Worked Example
Imagine three search results side by side: one titled "Levitra: what to know", one titled "Tadalafil dosing explained", and one titled "Is Viagra right for you?"
At first glance that looks like content about four or five different things. In reality it is three articles, each about one of the same three medicines, using a brand name in two cases and a generic name in the third.
Recognising that pattern, rather than treating each headline as pointing to something new, is the practical skill this page is trying to build.
Some Brand Names Cover More Than One Product
Viagra and Viagra Connect
Viagra and Viagra Connect are both sildenafil, but they are not identical in status.
Viagra is a prescription-only medicine. Viagra Connect is a fixed 50mg version of sildenafil that was reclassified in 2017, meaning it is available from a pharmacy without a prescription, following a pharmacist consultation.
Both are genuinely sildenafil, but knowing which one is being discussed matters.
Cialis, Cialis Together and Cialis Daily
Tadalafil is sold under a few different brand-related names too.
Cialis is a brand name used for tadalafil products taken when needed. Cialis Daily is a lower-dose formulation taken every day rather than only when needed. Cialis Together is a pharmacy-available tadalafil product in the UK, with different supply requirements from prescription-only tadalafil.
All three are tadalafil, but they represent different products with different regulatory status or dosing patterns.
Tadalafil can start working in as little as 30 minutes and may remain effective for up to 36 hours, with a half-life of about 17.5 hours. It is minimally affected by food, and is also licensed to treat benign prostatic hyperplasia.
Vardenafil and Levitra: No Equivalent Split
Vardenafil has not been through this kind of reclassification. It is supplied as a prescription medicine in the UK, with no pharmacy-available equivalent.
It is typically taken about 25 to 60 minutes before sexual activity, with one dose used for that occasion.
That is a genuine difference in regulatory history between vardenafil and the other two, rather than a gap or an oversight in how it is available.
Why This Matters When Searching
Because Viagra and Cialis each cover more than one underlying product, a search using only the brand name can return results for products with meaningfully different regulatory status, a prescription-only medicine and a pharmacy-available one, without making that distinction obvious.
Vardenafil does not have this complication, but it is worth checking which specific product, not just which brand, a given piece of content is describing whenever Viagra or Cialis are involved.
What Actually Differs Between the Three
Once the naming is sorted out, there are genuine differences between vardenafil, tadalafil and sildenafil, particularly around duration and dosing.
Vardenafil and sildenafil are both relatively short-acting, with effects generally lasting several hours. Tadalafil lasts considerably longer and may remain effective for up to 36 hours. Tadalafil is also available as a continuous daily dose, unlike the other two.
Onset varies too, and the exact timing differs between people. All three work by improving blood flow, and all three still require sexual stimulation to produce an erection.
Tadalafil is less affected by food, while a high-fat meal may delay how quickly vardenafil and sildenafil are absorbed.
This page focuses on sorting out the names rather than repeating a full feature-by-feature comparison, which is covered in dedicated comparison content. The point here is making sure any comparison you read is comparing three correctly identified medicines rather than a confused mix of brand and generic terms.
How to Know Which Name You Are Looking At
The active ingredient name is the most reliable thing to check, since it tells you what the medicine actually is regardless of which brand or product name a piece of content uses.
Product packaging, patient information leaflets and prescriptions all state the active ingredient clearly, and that is the detail worth anchoring to rather than the brand name alone.
Naming Reference
| Generic name | Brand names | Regulatory notes |
|---|---|---|
| Vardenafil | Levitra | Prescription-only in the UK, with no pharmacy-available equivalent |
| Tadalafil | Cialis, Cialis Together, Cialis Daily | Cialis Together is available from a pharmacy following a consultation. Cialis Daily is a continuous daily dose |
| Sildenafil | Viagra, Viagra Connect | Viagra Connect was reclassified for pharmacy availability in 2017 |
Getting the Right Medicine, Correctly Identified
Which of these is genuinely suitable for you is a decision for an individual clinical assessment, based on your health history and what you are looking for, rather than on which name happened to come up in a search.
Cost can also matter, and generic versions are typically less expensive than the branded equivalents. That is a legitimate thing to raise at your assessment.
An online consultation with UK registered prescribers is built around exactly this, working from the active ingredient and your circumstances rather than a brand name alone.
Medical Disclaimer
This page is for general information only and does not replace individual clinical advice. Vardenafil, tadalafil and sildenafil are available as prescription medicines in the UK, although some specific sildenafil and tadalafil products have different pharmacy supply arrangements.
Do not take more than the recommended maximum dose of any of these medicines, and do not combine two PDE5 inhibitors. None of them should be taken with nitrate medicines, because the combination can cause a dangerous drop in blood pressure.
These medicines relax blood vessels, which may lower blood pressure and contribute to side effects such as dizziness or flushing. Common side effects include headache, flushing and nasal congestion, and are generally mild. Back pain is among the reported effects with tadalafil, and vardenafil may rarely cause visual disturbances.
Sexual stimulation is still required for any of them to work.
If you experience an erection lasting longer than four hours, or symptoms such as chest pain, severe dizziness, fainting or sudden loss of vision, seek urgent medical help by calling 999 or attending A&E.
For any other concerns about your medicine, speak to your prescriber or pharmacist.
