Vardenafil 40mg: Why This Strength Is Not Licensed in the UK
Vardenafil is not licensed at 40mg in the UK. The licensed strengths are 5mg, 10mg and 20mg, and the usual starting dose is 10mg.
So if you have come across vardenafil 40mg, the key question is not just the dose, but whether the product being offered is legitimate. This page explains the licensed range, the risks of unlicensed strengths, and the warning signs that should make you avoid a seller.
Key things to know
- The licensed UK strengths are 5mg, 10mg and 20mg. There is no 40mg strength
- The usual starting dose is 10mg, taken as needed, and 20mg is the maximum
- Any vardenafil offered outside a registered UK pharmacy carries real risk, whatever the stated strength
- Bulk, trade or wholesale language around this medicine is a red flag
- The safe route is a prescription after an appropriate clinical assessment
The Licensed Range
Vardenafil is licensed in the UK at 5mg, 10mg and 20mg. 20mg is the maximum dose, taken no more than once in any 24-hour period. Branded Levitra and generic vardenafil contain the same active ingredient.
A prescriber decides the right dose based on your age, health, other medicines, response and side effects. Some people need a lower dose. Anyone for whom the licensed doses are not working is clinically reviewed, not moved on to an unlicensed higher one.
A prescribed dose is usually taken 25 to 60 minutes before sexual activity, and its effect can last up to around 5 hours. It only works with sexual stimulation.
Why You Might See "40mg" Mentioned
There are a few possible reasons: confusion with another medicine's dosing scale, such as sildenafil's, a simple error, or listings that are not part of a regulated UK supply chain at all. None of them means a licensed 40mg vardenafil product exists.

Why the Source Matters More Than the Number
Any vardenafil that does not come through a UK pharmacy after a clinical assessment carries serious risk, whatever strength is advertised. The assessment exists to catch the things that make vardenafil unsafe.
Vardenafil must not be taken with nitrate medicines, because the combination can cause a dangerous fall in blood pressure. Alpha blockers can also interact, increasing the risk of low blood pressure, dizziness or fainting. Grapefruit juice affects how it is processed, and alcohol and recreational drugs can reduce how well it works and increase side effects.
People with liver disease, or taking certain interacting medicines, may need a tailored review. An unlicensed seller checks none of this.
Why Bulk or Trade Language Is a Red Flag
Vardenafil is a prescription-only medicine. Legitimate supply is tied to an individual assessment: one patient, and one dose decided by their own health.
Commercial, trade or bulk-buying language does not fit that model. A legitimate pharmacy has no reason to describe patient supply in those terms. It is a sign the product may not be intended for normal individual patient supply, so check the seller's regulatory status and prescribing process before going any further.
What a Genuine Supply Looks Like
A licensed supply of vardenafil always follows an individual clinical assessment, and is dispensed by a pharmacy you can verify on the General Pharmaceutical Council register. It comes as a tablet at one of the licensed strengths. There is no legitimate route that skips that process, whatever the strength claimed or how the offer is described.
If You Come Across an Unusual Listing
If you see vardenafil advertised in an unusual strength, offered in bulk, or listed without any clear assessment, treat it as a warning sign. Search results do not vet legitimacy, so look deliberately for a source that describes an individual assessment and identifies itself as a registered UK pharmacy.
Side Effects and Safety
Vardenafil is used to treat erectile dysfunction. It can be taken with or without food, although a high-fat meal may delay how quickly it works.
Common side effects include headache, facial flushing, nasal congestion and indigestion. If side effects are troublesome or do not settle, speak to your prescriber.
Seek urgent medical attention for chest pain, sudden changes in vision or hearing, or an erection lasting four hours or longer.
Medical Disclaimer
This page provides general information about vardenafil strengths in the UK. It does not provide personalised prescribing or dosing instructions. Treatment suitability depends on an individual clinical assessment.









