Filitra (Vardenafil) – Patient Guide (UK)
Filitra contains vardenafil, a medicine used to treat erectile dysfunction (ED) in adult men. This patient-friendly guide explains how Filitra works, how to take it, what to expect, common side effects, important safety information, and practical tips for the best results. It also covers interactions with food, alcohol, and other medicines, and includes UK-specific information about availability and legal considerations.
This information is designed to help you understand the medicine. It is not a substitute for advice from a healthcare professional.
Basic product information
| Item | Details |
|---|---|
| Medicine | Filitra |
| Active ingredient | Vardenafil |
| Medicinal class | Phosphodiesterase type 5 (PDE5) inhibitor |
| What it treats | Erectile dysfunction in adult men |
| How it works | Helps increase blood flow to the penis when sexually stimulated |
| Common forms | Tablets (strengths may vary by product) |
How Filitra works (mechanism of action)
Erection depends on blood flow. During sexual stimulation, nerves release nitric oxide (NO) in penile tissue. NO activates an enzyme pathway that increases levels of cyclic guanosine monophosphate (cGMP). cGMP helps smooth muscle in the penis relax, allowing more blood to enter.
Vardenafil belongs to the PDE5 inhibitor group. PDE5 is an enzyme that breaks down cGMP. By blocking PDE5, vardenafil helps maintain higher cGMP levels, which supports improved blood flow. Filitra is therefore most effective when combined with sexual stimulation.
Important: Filitra does not automatically cause an erection without sexual arousal. It supports the natural process by enhancing blood flow.
Pharmacokinetics (how the body handles vardenafil)
Pharmacokinetics describes absorption, distribution, metabolism, and elimination. While individual results vary, the following provides a general understanding of how vardenafil behaves in the body.
- Absorption: Vardenafil is absorbed after oral administration. Onset can begin within about an hour for many people.
- Peak effect: The maximum effect in the bloodstream typically occurs within a few hours (often around 1–2 hours for many formulations).
- Duration: The medicine may be active for several hours; some men experience effects for longer periods depending on dose and individual response.
- Metabolism: Vardenafil is mainly processed by the liver, involving enzymes such as CYP3A4.
- Elimination: Metabolites are cleared primarily via the body’s normal excretory routes (commonly through urine and faeces).
If you have liver or kidney problems, the medicine may remain in your system longer. This can affect dosing and safety, so it’s important to follow the recommended regimen for your situation.
Typical use and what to expect
Filitra is used to help men achieve and maintain an erection sufficient for satisfactory sexual activity. You should use it only when you anticipate sexual activity.
Common expectations:
- You may notice improved erectile function after taking the tablet and allowing time for it to work.
- It works best with sexual stimulation; it does not replace arousal.
- Some men need dose adjustment or timing changes to find what suits them.
If you do not experience any benefit after several attempts, discuss possible causes with a healthcare professional (e.g., other medications, alcohol intake, timing, underlying conditions, or incorrect dosing).
Timing: when to take Filitra
Timing can strongly affect how well Filitra works. As a general guide:
- Typical timing: Take the tablet about 30 minutes to 1 hour before sexual activity.
- If meals are involved: Heavy or fatty meals can delay the onset. You may need to allow longer (see Food interactions below).
- Consistency: Try a planned timing approach for a few attempts before deciding it doesn’t suit you.
If you have been advised on a specific schedule, follow that guidance. Avoid taking multiple doses close together.
Indications: who Filitra is for
Filitra (vardenafil) is indicated for the treatment of erectile dysfunction in adult men, including when ED is related to factors such as stress, lifestyle, or underlying medical conditions (as determined by a clinician).
It is not intended for women or children.
Dosing (general guidance)
Dosing should be individualised based on age, other medicines, medical conditions, and tolerability. The following is typical general information.
Common starting approach
- Many men start with the lowest effective dose.
- Depending on how you respond and side effects, your clinician may adjust the dose.
How often
- Generally, vardenafil is taken as needed before sexual activity.
- Do not exceed the maximum recommended frequency per day. Follow the dosing schedule provided on the product label or by your healthcare professional.
Special populations
- Elderly: Some men may be more sensitive and require a lower starting dose.
- Liver impairment: Dose adjustments may be needed; some combinations may be avoided.
- Kidney impairment: Dose adjustments may be needed depending on severity.
- Drug interactions: If you take medicines that affect vardenafil metabolism, the dose may need adjustment or avoidance of certain combinations.
If you are unsure about the correct dose for your situation, seek professional advice before using Filitra.
Food interactions: effect of meals on Filitra
Food can affect absorption and timing. A heavy meal may delay the medicine reaching peak effect, which can reduce or postpone benefit.
- Fatty or heavy meals: May delay onset. Consider taking Filitra on a more lightly loaded stomach.
- Timing adjustments: If you eat a large meal shortly before taking Filitra, you may need to allow more time before sex.
- Light meals: Typically less likely to cause significant delays.
If you notice reduced effect after meals, try an approach with a lighter meal and consistent timing for future attempts.
Alcohol and medicine interactions
Alcohol
Alcohol can worsen erectile dysfunction by affecting nerve signalling and blood flow. It may also increase the likelihood of dizziness or low blood pressure. Even if you take Filitra correctly, heavy drinking can reduce effectiveness.
- Moderate alcohol: Some men may still respond, but effects can vary.
- High alcohol intake: More likely to reduce erection quality and increase side effects such as flushing or light-headedness.
Medicines that must be used with caution
Vardenafil can interact with several medicines, especially those affecting blood pressure or vardenafil levels in the body. Always tell healthcare professionals about all medicines you use, including herbal products.
1) Nitrates (dangerous interaction)
Do not combine vardenafil with nitrates (e.g., glyceryl trinitrate/GTN) or “nitric oxide donors”. This combination can cause a significant drop in blood pressure.
2) “Riociguat” (dangerous interaction)
Vardenafil should not be combined with riociguat due to risk of severe hypotension.
3) Alpha-blockers
Some men with urinary symptoms take alpha-blockers. Combining them with PDE5 inhibitors can lower blood pressure. Caution and timing adjustments may be needed, and starting doses should be conservative.
4) Strong enzyme inhibitors (CYP3A4)
Medicines that strongly inhibit CYP3A4 can raise vardenafil levels, increasing the risk of side effects. Examples include certain antifungals (e.g., ketoconazole/itraconazole) and some antivirals.
5) Antihypertensives and blood pressure medicines
Vardenafil can contribute to blood pressure lowering in some men. The combination may cause dizziness or light-headedness, particularly when standing.
6) Other ED medicines
Do not take vardenafil together with other PDE5 inhibitors (such as sildenafil or tadalafil). Using multiple ED medicines increases the risk of adverse effects without improving safety.
7) Recreational substances
Using “poppers” (amyl nitrite, amyl nitrite-like substances) can be particularly dangerous due to severe blood pressure effects. Avoid combining with any PDE5 inhibitor.
Safety profile and side effects
Like all medicines, Filitra can cause side effects. Not everyone gets them. Many side effects are mild and transient. However, certain reactions can be serious and require urgent medical attention.
Common side effects
- Headache
- Flushing (warmth or redness in the face)
- Dizziness
- Stuffy or runny nose (nasal congestion)
- Indigestion or nausea
- Back pain or muscle aches (may occur in some PDE5 inhibitors)
- Visual disturbance (e.g., blurred vision or altered colour perception in some cases)
Less common but important risks
- Low blood pressure, especially when combined with other blood pressure-lowering medicines
- Priapism (an erection lasting longer than 4 hours). This requires urgent medical attention.
- Severe allergic reactions (swelling of the face/lips, breathing difficulty, rash).
- Heart-related symptoms (chest pain, severe shortness of breath). If you have these symptoms, seek emergency care.
Who should avoid Filitra
Filitra may not be suitable for everyone. You should avoid vardenafil and seek professional advice if you have:
- Medicines interactions such as nitrates or riociguat
- Significant heart or blood pressure problems that make sexual activity unsafe
- History of non-arteritic anterior ischaemic optic neuropathy (NAION) in some PDE5 inhibitor contexts (ask your clinician)
- Severe liver impairment (dose/formulation suitability depends on medical judgement)
- Conditions predisposing to prolonged erections (e.g., sickle cell anaemia, leukaemia, certain anatomical penile conditions)
When to seek urgent help
- If you have an erection lasting more than 4 hours
- If you develop chest pain, fainting, or severe breathlessness
- If you have symptoms of a severe allergic reaction (swelling, breathing difficulty)
- If you notice sudden vision loss or severe eye symptoms
Practical use tips for best results
- Start with the right timing: Try taking Filitra 30 minutes to 1 hour before sexual activity.
- Keep alcohol moderate: Excess alcohol can reduce effectiveness and increase dizziness.
- Choose lighter meals beforehand: Heavy meals can delay onset.
- Use sexual stimulation: Vardenafil supports blood flow but still needs arousal to work well.
- Give it a few tries: Sometimes the first attempt is not ideal due to timing or meal effects.
- Avoid double-dosing: Do not take more than the recommended maximum frequency in 24 hours.
- Stand up carefully: If you feel light-headed, sit or lie down until you feel better.
- Review your medication list: Check for nitrates, riociguat, and strong enzyme inhibitors.
Lifestyle changes can also improve ED over time, such as stopping smoking, improving cardiovascular fitness, reducing excess weight, and managing stress.
Alternative options
If Filitra does not suit you or is not effective, there are other treatment approaches for erectile dysfunction. Alternatives include other PDE5 inhibitors, lifestyle measures, and non-drug options.
Other PDE5 inhibitors
- Sildenafil (e.g., brands vary): commonly used as needed.
- Tadalafil (e.g., longer-acting option): may be taken either as needed or at a regular schedule depending on the product.
- Other vardenafil formulations (if available): different onset/timing characteristics may suit different people.
Non-PDE5 options
- Vacuum erection devices
- Intra-cavernosal injections (specialist-led)
- Intra-urethral therapy (specialist-led)
- Counselling and addressing underlying causes (stress, relationship factors, depression, anxiety)
- Managing cardiovascular risk factors (diabetes, high blood pressure, high cholesterol)
The “best” alternative depends on your health profile, other medications, and preferences about timing.
UK market and legal context (availability and guidance)
In the United Kingdom, medicines are regulated to support safe supply, quality assurance, and appropriate use. Erectile dysfunction medicines fall under medicines regulation, and supply must comply with UK pharmaceutical laws and pharmacy standards.
When buying online, it’s important to ensure the product is legitimate and supplied through appropriate channels. Look for pharmacy accreditation details, clear product information (including strength and dosage form), and transparent delivery terms. Avoid sites that do not provide valid pharmacy credentials or that do not offer reliable product traceability.
Guidance for erectile dysfunction care in the UK is informed by clinical practice and patient safety principles, including cardiovascular assessment where appropriate and careful review of medicines that interact with PDE5 inhibitors.
For the latest official medical safety updates, consult reliable NHS and regulatory resources and discuss concerns with a qualified clinician.
Recent safety and prescribing-style guidance (what to keep in mind)
In recent years, key safety themes for PDE5 inhibitors have remained consistent in clinical practice:
- Avoid dangerous interactions (especially nitrates and riociguat).
- Assess cardiovascular suitability for sexual activity and ED treatment.
- Use caution with alpha-blockers and blood pressure medicines.
- Be careful with strong drug interactions that raise vardenafil levels.
- Recognise urgent conditions such as priapism and sudden vision changes.
If you have new symptoms, start any new medication, or plan surgery, it’s wise to re-check potential interactions before continuing Filitra.
Delivery and availability in the UK
Availability can vary depending on the specific stock and product strength. When ordering online, you typically choose a quantity and strength listed on the product page (if multiple options exist).
For UK delivery, check:
- Dispatch time: how quickly the order is prepared after purchase
- Delivery method: standard or tracked delivery
- Delivery timescales: typical estimated arrival windows
- Packaging: discretion and protection of the product
- Returns and customer support: clear policies for assistance
If you need the medicine urgently, check estimated delivery dates before purchasing. If you have concerns about suitability or interactions, contact customer support or seek medical advice.
FAQ – Frequently asked questions
Is Filitra the same as Viagra?
Filitra is vardenafil. Viagra is sildenafil. Both are PDE5 inhibitors and work in a similar way, but they can differ in timing, duration, and side effects for different people.
How long does Filitra take to work?
Many men notice effects within 30 minutes to 1 hour. Peak effect is often reached within a few hours, and onset may be delayed by heavy meals.
How long do the effects last?
Effects can last for several hours. The exact duration varies by dose, your individual response, and factors such as alcohol and meal timing.
Can I take Filitra every day?
Filitra is usually taken as needed before sexual activity, not continuously. Follow the recommended dosing instructions provided for your product.
Can I take it with food?
Yes, but food—especially heavy or fatty meals—may delay onset. For best results, consider a lighter meal and plan the timing.
What if I drink alcohol?
Moderate alcohol may be tolerated by some men, but heavy drinking can reduce effectiveness and increase dizziness. For safety, avoid excessive alcohol and be cautious if you feel light-headed.
Can I take Filitra if I have high blood pressure?
Many men with controlled blood pressure can use PDE5 inhibitors safely, but it depends on your specific medicines and overall cardiovascular health. Because vardenafil can affect blood pressure, it’s important to review all medicines and conditions with a healthcare professional.
Is it safe with my other medicines?
Some medicines should not be combined with vardenafil, especially nitrates and riociguat. Other interactions may require dose adjustments or caution (e.g., alpha-blockers, strong CYP3A4 inhibitors). Always review your medication list before use.
What should I do if I get a long-lasting erection?
If an erection lasts for more than 4 hours, seek urgent medical help immediately. This condition is called priapism and can cause damage if not treated promptly.
Will Filitra improve libido?
Filitra treats the erection mechanism by supporting blood flow. It does not directly increase sexual desire (libido). Stress, hormones, and relationship factors may also influence libido.
Can Filitra cause vision changes?
Some men report temporary visual effects such as blurred vision or altered colour perception. If you experience sudden vision loss or severe eye symptoms, seek urgent medical attention.
What if Filitra doesn’t work for me?
ED has many causes. If you don’t see benefit after a few correctly timed attempts, review: meal timing, alcohol intake, the correct dose, and possible drug interactions. Consider discussing underlying causes such as diabetes, cardiovascular health, or psychological factors.
How should I store Filitra?
Store tablets according to the instructions on the packaging. Keep them away from excessive heat, moisture, and out of reach of children.
Summary
Filitra (vardenafil) is a PDE5 inhibitor used to treat erectile dysfunction by enhancing blood flow to the penis during sexual stimulation. For best results, take it with appropriate timing (often 30 minutes to 1 hour before sex), avoid heavy/fatty meals close to dosing, and be cautious with alcohol and interacting medicines—especially nitrates and riociguat.
If you have questions about suitability or drug interactions, seek professional advice. If you experience urgent symptoms such as priapism or chest pain, get immediate medical help.

