Fildena Extra Power (Sildenafil Citrate) – Patient Information (UK)

Fildena Extra Power is a medicine containing sildenafil citrate. It is used to treat erectile dysfunction (ED) in adult men. This patient-friendly guide explains how it works, how to take it safely, what to expect, and important safety information for people in the United Kingdom.

Please read this information carefully before using Fildena Extra Power. It does not replace advice from a qualified healthcare professional.

Basic product information

The exact tablet strength of “Extra Power” can vary by manufacturer/market presentation. Always confirm the strength on the product label and follow the dosing guidance provided with your specific pack.

How Fildena Extra Power works (mechanism of action)

Sildenafil belongs to a group of medicines called PDE5 inhibitors (phosphodiesterase type 5 inhibitors).

During sexual arousal, nitric oxide is released in the penis. This triggers a chemical pathway that increases blood flow and helps the erectile tissue relax and expand. Sildenafil works by blocking the PDE5 enzyme, which helps maintain the effect of nitric oxide and supports improved blood flow.

• It does not automatically cause an erection. Sexual stimulation is still required.
• It helps your body respond better to arousal.

What to expect: typical indications and who it’s for

Fildena Extra Power is indicated for the treatment of erectile dysfunction—the consistent inability to achieve or maintain an erection sufficient for satisfactory sexual activity.

It may be considered when ED is related to factors such as stress, mild to moderate vascular issues, or other causes where PDE5 inhibition is appropriate. However, ED can sometimes be a sign of underlying health problems (for example, cardiovascular disease, diabetes, or medication side effects).

Important notes for safety

• Sildenafil is not a treatment for low sexual desire and does not improve libido directly.
• It should not be used by people who have conditions that make PDE5 inhibitors unsafe, particularly those using certain heart medicines (see “Nitrates and heart medicines” below).
• If ED started suddenly or is accompanied by chest pain, breathlessness, or neurological symptoms, seek urgent medical advice.

Pharmacokinetics (how the body handles sildenafil)

Pharmacokinetics describes how sildenafil is absorbed, distributed, metabolised, and eliminated. While individual responses vary, the following are key general points:

Absorption

• Sildenafil is absorbed after oral dosing.
• Peak concentration in the blood typically occurs within a few hours, but this can be delayed by food—especially fatty meals.

Distribution

• Sildenafil is distributed throughout the body and reaches the penile tissue to help support erection physiology.
• It is moderately protein-bound.

Metabolism

• Most sildenafil is metabolised in the liver, primarily via enzymes including CYP3A4.
• This is why some medicines (and some herbal products) can affect sildenafil levels.

Elimination

• Sildenafil and its metabolites are eliminated mainly through the liver and gut, and also via the kidneys.

In some people (for example, older adults, people with certain liver conditions, or those using interacting medicines), sildenafil levels may rise, increasing the risk of side effects. Dose adjustment may be required.

When and how to take it (timing and dosing basics)

Typical timing

For most men, sildenafil works within about 30–60 minutes after taking it by mouth. Some people notice effects earlier, while for others it may take closer to the full hour or longer—particularly if they have eaten a large, fatty meal.

A practical approach is to plan your dose so that sexual activity is expected within the window where the medicine is active.

How long it lasts

Sildenafil effects can last for several hours. Many people find that they can initiate sexual activity within a period of around 4 hours after dosing, although individual duration varies.

How often to take it

Generally, sildenafil is taken only as needed. Do not take more frequently than advised on your specific product label.

Dosing (general guidance)

The “Extra Power” product may contain a higher strength than some standard sildenafil tablets. Because the correct dose depends on your health status and interacting medicines, follow the dose stated on your pack and the guidance of a clinician if you have one.

In general terms (for patient education), clinicians often start with lower doses when appropriate, especially if:

• you are older (commonly over 65 years)
• you have liver impairment
• you take medicines that can increase sildenafil levels (for example, certain HIV or fungal infection treatments)
• you take medicines that lower blood pressure

How to take tablets

• Take the tablet with water.
• Try to take it at a consistent time each time you use it.
• If you are unsure about the best dose, start conservatively and avoid increasing dose without medical advice.

Food interactions (including fatty meals)

Food can affect sildenafil’s absorption. In particular, fatty meals can slow down absorption and delay peak effect.

• After a heavy meal: You may need to allow more time (for example, up to about 1–2 hours) before expecting full effect.
• On an empty stomach: Onset may be quicker.
• Grapefruit products: can increase sildenafil levels in some people, so it’s best to avoid or limit grapefruit.

If you notice reduced effectiveness on certain occasions, consider changing meal timing or reducing meal fat content.

Alcohol and medicine interactions

Alcohol

Drinking alcohol can worsen ED and may increase side effects such as dizziness and low blood pressure. If you choose to drink, keep it moderate.

• Too much alcohol may reduce the ability to achieve or maintain an erection.
• Because sildenafil can lower blood pressure, alcohol may make light-headedness more likely.

Key interactions with other medicines

Sildenafil may interact with medicines that affect blood pressure, liver enzymes, or nitric-oxide pathways. Some interactions can be dangerous.

Nitrates and “nitric oxide” medicines – avoid

Do not use sildenafil if you take nitrates (for example, glyceryl trinitrate tablets/spray/patch, isosorbide mononitrate/dinitrate, and other nitrate medicines), or if you are using riociguat.

• Combining sildenafil with nitrates/riociguat can cause a dangerous drop in blood pressure.
• If chest pain occurs while you have taken sildenafil, seek urgent medical help rather than self-treating with nitrates.

Alpha-blockers for prostate/urinary symptoms

If you take medicines such as tamsulosin, doxazosin, or other alpha-blockers, sildenafil can increase the risk of dizziness or low blood pressure—particularly around the time of your first doses or dose changes.

• Typically, a stable dose of alpha-blocker should be established first.
• Take care and consider starting with a lower sildenafil dose if advised by a clinician.

Medicines that raise sildenafil levels (CYP3A4 inhibitors)

Some medicines can increase sildenafil concentrations, raising the risk of side effects. Examples include:

• certain antifungal medicines (e.g., ketoconazole, itraconazole)
• some HIV treatments (e.g., ritonavir-containing regimens, cobicistat boosters)
• certain antibiotics (some macrolides)

If you use these, you may need a lower starting dose and careful monitoring.

Medicines that lower sildenafil levels (CYP3A4 inducers)

Some medicines can reduce sildenafil levels, making it less effective. Examples include certain anti-seizure medicines and some rifamycin antibiotics. If you suspect reduced effect, discuss options with a healthcare professional.

Other blood pressure-lowering medicines

Sildenafil can add to the blood pressure-lowering effects of other antihypertensive medicines. Many people can still use it safely, but dose and timing matter.

Safety profile: who should be cautious or avoid

Like all medicines, sildenafil can cause side effects. Most are mild to moderate and resolve on their own. However, some symptoms may indicate a serious problem.

Common side effects

• Headache
• Flushing (warmth/redness of the face)
• Indigestion or heartburn
• Stuffy nose
• Dizziness
• Visual disturbance (e.g., mild blurring, increased light sensitivity, “blue tint” vision in some cases)

Less common but important warnings

• Priapism (an erection lasting 4 hours or more). This is a medical emergency.
• Sudden vision loss or severe eye pain (seek urgent medical attention).
• Sudden hearing loss or ringing in the ears (seek urgent medical attention).
• Chest pain or symptoms of a heart problem—urgent assessment is required.
• Severe dizziness/fainting or signs of very low blood pressure.

Conditions requiring extra caution

Talk to a healthcare professional before use if you have any of the following:

• significant heart disease or unstable angina
• recent stroke or heart attack (timing matters)
• very low blood pressure
• certain blood cell disorders (e.g., sickle cell anaemia, multiple myeloma)
• severe liver or kidney problems
• a history of non-arteritic anterior ischaemic optic neuropathy (NAION)

Practical use tips for best results

• Ensure sexual stimulation: sildenafil supports erections during arousal, but it doesn’t act like an automatic “trigger”.
• Start with a sensible approach: if this is your first time, avoid jumping to a high dose. Use the dose on the pack and consider starting lower where appropriate.
• Manage timing with food: if you had a heavy/fatty meal, allow more time before sex.
• Stay hydrated: dehydration and high alcohol intake can worsen performance.
• Reduce stress: anxiety is a common ED contributor; calm reassurance can help.
• Track what works: note meal timing, dose, and onset to identify your personal pattern.

If you don’t get the expected effect after a few attempts at the correct dose and timing, it may be due to underlying causes (vascular health, hormone changes, psychological factors, or medication side effects). Consider medical review rather than increasing dose.

Alternative treatment options

Sildenafil is one option for ED. Depending on your health, preferences, and tolerance, alternatives may include:

Other PDE5 inhibitors

• Tadalafil (often longer lasting)
• Vardenafil
• Avanafil

These medicines work through a similar pathway but differ in onset and duration. A different PDE5 inhibitor may suit you better if side effects or timing don’t match your needs.

Non-medicine approaches

• Addressing smoking, weight, and physical activity
• Managing diabetes, high blood pressure, and cholesterol
• Reviewing medications that may contribute to ED (with professional guidance)
• Psychosexual therapy or counselling for anxiety/performance concerns

When specialist treatments may be considered

• Vacuum erection devices
• Intracavernosal injections or urethral therapies (specialist-led)
• In selected cases, penile implant surgery

Your best option depends on the cause, your overall health, and safety factors for PDE5 inhibitors.

Market and legal context for the United Kingdom (UK)

In the UK, sildenafil-based medicines are widely used for ED. The legal and regulatory landscape is designed to protect patients from unsafe or counterfeit products. When buying online, it is important to ensure the product is supplied through legitimate channels and that information on strength, batch details, and safety information is available.

We recommend:

• Choosing a reputable online pharmacy or regulated supplier
• Checking that product labelling clearly states the active ingredient and strength
• Confirming availability of clear safety information and customer support
• Not using products that are missing packaging, dose details, or reliable sourcing information

“Recent guidance” and safety expectations

UK medicines guidance continues to emphasise that ED is a medical condition and that sildenafil should be used safely—particularly regarding interactions with nitrates, riociguat, and certain heart medicines, and in people with relevant cardiovascular risks. Reputable healthcare providers also stress appropriate dosing and awareness of side effects such as vision changes and priapism.

If you are uncertain about interactions or suitability, consult a healthcare professional before using sildenafil.

Delivery, availability, and packaging

Availability varies by supplier and stock levels. When you order from a UK online pharmacy, you can typically expect:

• Secure packaging for privacy and protection
• Clear labelling with product details and instructions
• Estimated delivery times shown at checkout
• Customer support if you need help with order status

Delivery times can depend on your location and dispatch schedules. Always allow sufficient time for processing and shipping if you need the medicine for a specific date.

Frequently Asked Questions (FAQ)

1) Is Fildena Extra Power the same as Viagra?

Fildena Extra Power contains sildenafil citrate, which is the same active ingredient used in some branded sildenafil products (such as Viagra). Different products can have different tablet strengths and excipients, but the active ingredient is what drives the effect.

2) How quickly does it work?

Many men notice effects within 30–60 minutes. If you ate a heavy or fatty meal, it may take longer for full effect.

3) How long does it last?

Effects may last for several hours. A practical window for many people is up to about 4 hours after dosing, but your personal duration may differ.

4) Can I take it more than once a day?

Do not exceed the frequency stated on your product label. In general, sildenafil is intended for as-needed use rather than daily dosing for ED in most circumstances.

5) Can I take it with food?

Yes. However, a fatty meal can delay the onset and reduce how quickly it works. If you want faster results, consider taking it with a lighter meal or on a more empty stomach.

6) Is it safe with alcohol?

Moderate alcohol is less likely to cause issues, but heavy drinking can worsen ED and increase side effects like dizziness. Keep alcohol intake low to minimise risk.

7) What medicines should not be taken with sildenafil?

Do not use sildenafil if you take nitrates or riociguat. Take extra care with alpha-blockers and with medicines that interact via liver enzymes (for example, some antifungals, HIV treatments, and certain antibiotics). If you list your medicines, a pharmacist can advise on likely interactions.

8) What if I get side effects?

Mild side effects like headache, flushing, or indigestion usually improve. If you experience severe dizziness, fainting, chest pain, prolonged erection (over 4 hours), or sudden vision/hearing changes, seek urgent medical help.

9) What should I do if it doesn’t work?

Consider whether timing and food played a role, and ensure you are using it correctly (sexual stimulation is required). If it’s not working after several properly timed attempts, it may be due to underlying causes—seek medical advice rather than increasing dose.

10) Can women or children use it?

Sildenafil is intended for adult men with erectile dysfunction. It is not generally used in women or children.

11) Are there any driving or work warnings?

Sildenafil can cause dizziness or visual disturbances in some people. If you feel affected, avoid driving or operating machinery until you feel normal again.

12) How should I store it?

Keep tablets in their original packaging, away from moisture and heat. Store at room temperature unless your pack instructs otherwise, and keep out of sight and reach of children.

Important final reminders

• Check interactions first: avoid nitrates/riociguat and be cautious with alpha-blockers and interacting medicines.
• Use correctly: sexual stimulation is needed for sildenafil to work.
• Take safety seriously: seek urgent help for prolonged erections, severe chest pain, fainting, or sudden vision/hearing loss.
• Seek advice for persistent ED: ED can be linked to cardiovascular or metabolic health issues.

If you would like, share your current medicines (including over-the-counter and herbal products) and general health conditions, and we can help you identify potential interaction concerns before you use sildenafil.