Fildena CT (Sildenafil Citrate) – Patient Information (UK)

Fildena CT contains sildenafil citrate, a medicine used to help treat erectile dysfunction (ED) in men. This page explains how it works, how to take it, expected timing, key safety information, and practical tips to get the best results. Always read the patient information leaflet provided with your medicine and follow the instructions from your healthcare professional.

Quick overview

• Medicine: Fildena CT (sildenafil citrate)
• What it’s for: Erectile dysfunction (difficulty getting or maintaining an erection)
• How it works: Helps relax blood vessels to increase blood flow to the penis
• How fast it works: Often within 30–60 minutes (varies by person)
• Typical duration: Effects can last about 4 hours (sometimes longer)
• Important warning: Never take sildenafil with nitrates or riociguat (dangerous fall in blood pressure)

Basic product information

Fildena CT is a brand of sildenafil citrate. Sildenafil belongs to a class of medicines called PDE5 inhibitors (phosphodiesterase type 5 inhibitors).

How sildenafil works (mechanism of action)

To get an erection, blood flow to the penis must increase. Sildenafil supports this process by blocking an enzyme called PDE5.

When sexual stimulation occurs, sildenafil helps the natural nitric oxide–cGMP pathway work more effectively. This leads to:

• Relaxation of smooth muscle in penile blood vessels
• Increased blood flow to the penis
• A better ability to get and maintain an erection

Sildenafil does not automatically cause an erection. It works best when there is sexual stimulation.

Pharmacokinetics (how the body handles the medicine)

Pharmacokinetics describes how the drug is absorbed, distributed, metabolised, and eliminated.

• Absorption: Sildenafil is absorbed after oral dosing. Peak blood levels are typically reached within about 30–120 minutes.
• Food effects: A heavy or high-fat meal can delay absorption and slow onset.
• Distribution: It binds to plasma proteins and is distributed throughout the body.
• Metabolism: Mainly broken down by the liver (notably via CYP3A4 enzymes).
• Elimination: Excreted mainly as metabolites, primarily through bile and faeces, with some renal clearance.

Because metabolism can vary between individuals, the speed and strength of effect may differ from person to person.

What Fildena CT is used for (indications)

Fildena CT is used to treat erectile dysfunction—the inability to achieve or maintain an erection sufficient for satisfactory sexual activity.

Erectile dysfunction can have physical and psychological causes. If ED is new, worsening, or associated with other symptoms (such as chest pain on exertion), it is important to seek medical advice.

Typical dosing and timing (how to take it)

Dosing may differ depending on your health profile and the strength of tablets you have. Follow the instructions provided with your medicine or those of your healthcare professional. The general principles below apply to sildenafil for ED.

Typical on-demand use

• Take when needed: Often taken about 30–60 minutes before sexual activity.
• Once daily maximum: Do not exceed the prescribed dosing frequency. Many sildenafil regimens restrict dosing to no more than once per day.
• Start low if appropriate: Some people benefit from a lower dose due to side effects, age, or interactions.

Timing tips

• If you eat a heavy meal, you may need to allow more time (onset can be slower).
• For best results, try taking it at a similar time before sexual activity each time.
• Give yourself a chance to see how it works on more than one occasion—ED treatment can be affected by stress, arousal, and lifestyle factors.

Food interactions

Food can affect how quickly sildenafil starts working. In particular:

• High-fat meals: Can delay absorption and reduce the speed of onset.
• Light meals: Usually less likely to cause a noticeable delay.

If your tablet seems to “not work on time,” consider taking it with a lighter meal or leaving more time between taking the dose and sexual activity.

Alcohol and medicine interactions

Alcohol

• Small to moderate amounts may not cause major issues for many people, but alcohol can reduce sexual performance and increase dizziness in some users.
• Heavy drinking can worsen ED and may increase the risk of side effects such as low blood pressure and headache.

Important medicine interactions

Some medicines can be dangerous when combined with sildenafil because they may significantly lower blood pressure or increase sildenafil levels. Always check interactions if you take other medicines regularly.

• Nitrates (contraindicated): e.g., glyceryl trinitrate (GTN), isosorbide mononitrate/dinitrate. Combining can cause a dangerous drop in blood pressure.
• Riociguat (contraindicated): Used for certain types of pulmonary hypertension; combination is unsafe.
• Alpha-blockers: Used for prostate symptoms or blood pressure. Taking together may increase risk of low blood pressure, especially when starting or adjusting doses.
• Strong CYP3A4 inhibitors: e.g., some antifungals (ketoconazole/itraconazole), some antibiotics (clarithromycin), HIV protease inhibitors—these may raise sildenafil levels and increase side effects.
• Other PDE5 inhibitors: Do not combine with other erectile dysfunction medicines.
• Blood pressure medicines: May enhance blood-pressure lowering effects in some people.
• “Poppers” (amyl nitrite, etc.): Avoid—can cause severe hypotension with PDE5 inhibitors.

If you are unsure about any medicine you take (including for heart conditions, prostate problems, migraines, or infections), check with a pharmacist before using sildenafil.

Safety profile and side effects

Common side effects

Like all medicines, sildenafil can cause side effects. Commonly reported effects include:

• Headache
• Flushing (warmth/redness of the face)
• Dizziness
• Indigestion or stomach upset
• Nasal congestion (blocked nose)
• Visual disturbances (e.g., mild changes in colour vision or blurred vision)

Less common but serious warnings

Seek urgent medical help if you experience:

• Chest pain or symptoms suggesting a heart problem
• Severe dizziness/fainting
• Sudden loss of vision in one or both eyes (rare)
• Sudden hearing loss or ringing in the ears (rare)
• Priapism: an erection lasting 4 hours or more (emergency)

Who should be extra cautious

Extra care is needed if you have certain medical conditions, especially:

• Serious heart or circulation problems (your doctor may assess whether sexual activity is safe)
• Low blood pressure or recent blood pressure changes
• Severe liver impairment or kidney problems
• History of stroke or significant cardiovascular disease
• Blood disorders (e.g., sickle cell anaemia) or conditions affecting erections
• Retinitis pigmentosa (rare inherited eye condition)

If you are at increased risk, your dose and suitability should be assessed by a healthcare professional.

Practical use tips (to improve results)

• Ensure you are sexually stimulated: Sildenafil assists the response, but arousal is still needed.
• Aim for the right time: Most people benefit from taking the tablet 30–60 minutes before sex.
• Consider a lighter meal: Avoid very heavy, fatty meals close to dosing.
• Don’t overdo alcohol: Alcohol can affect erection quality.
• Try consistent conditions: Stress, fatigue, and performance anxiety can strongly affect ED.
• Be patient: If the first attempt doesn’t work, it may be due to timing or context rather than medicine failure.
• Record what happened: Note time taken, meal timing, alcohol, and whether it worked. This can help refine timing next time.

Alternative options (if sildenafil isn’t suitable)

ED can be treated in different ways. Alternatives depend on your health, preferences, and what’s safe for you.

Other oral PDE5 inhibitors

• Tadalafil (often longer-lasting for some people)
• Vardenafil
• Avanafil

Non-oral options

• Vacuum erection devices (pump-based therapy)
• Intraurethral or injectable medicines (used under medical guidance)
• Psychosexual support if anxiety or relationship factors contribute

Lifestyle improvements

• Stop smoking and limit alcohol
• Increase physical activity
• Improve sleep and reduce stress
• Maintain a healthy weight
• Manage conditions like diabetes, high blood pressure, and high cholesterol

If ED persists, a broader medical review is worthwhile—ED can sometimes be an early sign of cardiovascular issues.

UK market and legal context (what to expect)

In the UK, erectile dysfunction medicines are regulated medicines. Access depends on legal supply routes and safety checks. When buying online, reputable services typically provide:

• Clear product information and patient guidance
• Safety screening for contraindications and interactions
• Legitimate sourcing and appropriate packaging
• Professional customer support

A key UK safety focus is preventing unsafe combinations (especially nitrates and riociguat) and ensuring the medicine is appropriate for the customer’s health status. Always use a UK-compliant pharmacy or regulated service and avoid counterfeit products.

Recent guidance and best-practice considerations in the UK

While exact recommendations can vary by individual circumstances, current best-practice in ED care generally includes:

• Cardiovascular safety: People with significant heart disease should be assessed for suitability, because sexual activity and PDE5 inhibitors may interact with cardiovascular risk.
• Medication interaction screening: Emphasis on identifying nitrates, riociguat, strong interacting drugs, and careful use with alpha-blockers.
• Start-gentle approach: Many people are advised to begin with a lower dose if they are older or more susceptible to side effects, then adjust if needed.
• Check underlying causes: ED can be linked with diabetes, hormonal issues, depression/anxiety, and vascular disease.

If your ED is new, you have symptoms such as chest pain, or you have notable cardiovascular risk factors, seek healthcare advice promptly.

Delivery, availability, and where to get help

Availability and delivery options can vary by supplier and stock levels. When ordering online:

• Check delivery regions and times: UK-wide delivery may be available, but lead times can differ.
• Packaging: Your order should be discreetly packaged and delivered according to the supplier’s policy.
• Customer support: Use help channels if you have questions about dosing, side effects, or interactions.

If you experience severe side effects or an emergency (for example, priapism), seek urgent medical care immediately.

FAQ – Frequently asked questions

Summary

Fildena CT (sildenafil citrate) is a PDE5 inhibitor used to treat erectile dysfunction by improving blood flow to the penis during sexual stimulation. Many users find it helpful when taken 30–60 minutes before sex, with effects usually lasting up to about 4 hours. For safe use in the UK, it’s essential to avoid contraindicated combinations (especially nitrates and riociguat), understand food and alcohol influences, and pay attention to safety warnings.