Silvitra (Sildenafil Citrate 100 mg + Vardenafil 20 mg) – Patient Information (UK)

Silvitra is a combination medicine containing two phosphodiesterase type 5 (PDE5) inhibitors: sildenafil citrate 100 mg and vardenafil 20 mg. It is used to help achieve and maintain an erection when sexual stimulation occurs. This page provides patient-friendly information about how Silvitra works, how it is usually taken, what to expect, and important safety and interaction guidance.

Always read the product label and follow the advice given by a healthcare professional or the instructions supplied with your medicine. If anything in this information worries you, ask a clinician or pharmacist for advice.

Basic product information

Item	Details
Medicine name	Silvitra
Active ingredients	Sildenafil citrate 100 mg + Vardenafil 20 mg
Medicine type	PDE5 inhibitor combination for erectile function
Indications (use)	Erectile dysfunction (difficulty getting/keeping an erection)
How it is taken	Oral (by mouth), usually taken before planned sexual activity
Common packaging	Tablets (strength as above)
Typical availability (UK online pharmacies)	Availability varies by supplier; always check current listings and local requirements

How Silvitra works (mechanism of action)

Erection is controlled by blood flow to the penis. During sexual stimulation, nerve signals increase nitric oxide release, which activates an enzyme pathway that increases levels of a molecule called cGMP. Higher cGMP helps the smooth muscles in penile blood vessels relax, allowing increased blood flow and erection.

Sildenafil and vardenafil both belong to the PDE5 inhibitor class. PDE5 is an enzyme that normally breaks down cGMP. By blocking PDE5, these medicines help maintain cGMP levels, supporting improved blood flow during sexual stimulation.

Important: Silvitra does not cause an erection by itself. It works only in response to sexual arousal.

Pharmacokinetics (how the body handles it)

Pharmacokinetics describe how quickly the body absorbs, distributes, metabolises, and eliminates a medicine. While exact results vary between individuals (for example, by age, liver function, and other medications), PDE5 inhibitors generally share the following patterns:

Absorption and onset

• Onset: Many people feel effects within about 30 to 60 minutes after taking a PDE5 inhibitor.
• Peak effect: Effects often peak around 1 to 2 hours (individual variation is common).
• Combination products: With both sildenafil and vardenafil present, the overall “window” may differ from either medicine alone.

Distribution and metabolism

• These medicines are distributed throughout the body and are processed primarily by the liver via enzyme systems (notably CYP450 pathways).
• This is why drug interactions can be important, especially with medicines that affect CYP enzymes.

Elimination

• Metabolites are removed mainly via liver metabolism and bile/urine pathways.
• Duration of action varies. Some people notice effects for several hours, though the strongest effect is typically earlier.

What Silvitra is used for (indications)

Silvitra is intended for the treatment of erectile dysfunction (ED), defined as persistent or recurrent inability to achieve or maintain an erection sufficient for satisfactory sexual performance.

It may be recommended when ED is related to factors such as reduced blood flow, age-related changes, stress-related issues, or other underlying causes—provided it is medically safe to take PDE5 inhibitors.

Who should be careful (key safety considerations)

PDE5 inhibitors like sildenafil and vardenafil can be unsafe in certain situations. Silvitra may not be suitable if you:

• Take medicines containing nitrates (for example, glyceryl trinitrate) or nitrite-based** preparations for chest pain.
• Take medicines known as “poppers” (amyl nitrite, amyl nitrite derivatives), which can interact dangerously.
• Have been advised not to have sexual activity due to serious heart conditions or unstable cardiovascular disease.
• Have severe liver impairment or severe kidney impairment (dose and suitability need careful consideration).
• Have a history of certain eye conditions such as non-arteritic anterior ischaemic optic neuropathy (NAION).
• Have very low blood pressure or certain forms of cardiovascular disease.

Seek urgent medical help if you experience chest pain, dizziness/fainting, or a prolonged erection (see “When to get urgent help”).

Typical dosing and how to take it

Silvitra is supplied as a tablet containing sildenafil citrate 100 mg plus vardenafil 20 mg. The dosing schedule below is intended as general patient information. Follow the instructions on your product label and any professional guidance you have received.

Typical adult use

• Starting dose: Many patients will start at the lowest effective dose available to them, but Silvitra is a high-strength combination tablet.
• Frequency: Do not take more than the recommended frequency shown on your product guidance.
• Maximum interval: PDE5 inhibitors are usually not taken multiple times per day.

Timing (when to take it)

Silvitra is typically taken about 30 to 60 minutes before sexual activity. Some people find they benefit when taken earlier, while others need a slightly later window. Expect best effect when you are ready for sexual stimulation.

• If taken too close to sexual activity, absorption may be incomplete.
• If taken too far in advance, the effect may reduce before arousal occurs.

How to take it

• Swallow the tablet with water.
• You may take it with or without food, but see the “Food interactions” section for details.
• Avoid crushing or splitting unless advised by the product instructions.

Timing adjustments: factors that influence onset

The time it takes to work can change depending on:

• Food (especially heavy/fatty meals)
• Alcohol intake
• Other medicines (particularly CYP enzyme inhibitors/inducers)
• Age and individual metabolism
• Underlying health (liver/kidney function and cardiovascular status)

Food interactions (including fatty meals)

Many PDE5 inhibitors have an absorption that can be affected by meals. In general:

• Heavy or high-fat meals may delay absorption and reduce or slow onset.
• For a quicker onset, consider taking Silvitra with a lighter meal or on a more empty stomach.

If you notice the medicine works more slowly after meals, try adjusting timing on a future occasion (within the recommended guidance) rather than increasing the dose.

Alcohol interactions

Alcohol can worsen erectile dysfunction and can also increase the likelihood of side effects such as dizziness, headache, flushing, and lowered blood pressure. Combined use can make you feel light-headed—especially when standing.

• Best approach: Keep alcohol intake modest.
• Avoid excessive drinking. If you drink, allow time for alcohol to clear.
• Be cautious with activities that require balance or focus if you feel dizzy.

If you experience fainting or severe dizziness, do not take any more and seek medical advice.

Medicine interactions: what to avoid

Interactions are one of the most important safety topics with PDE5 inhibitors. Certain combinations can be dangerous. Always check with a pharmacist or clinician if you are unsure about your medicines.

Absolutely avoid (or only use under specialist direction)

• Nitrates (for angina/chest pain): examples include glyceryl trinitrate (GTN) and isosorbide preparations.
• Nitrite recreational drugs (“poppers” such as amyl nitrite).
• Riociguat and similar medicines used for pulmonary hypertension (this combination can dangerously lower blood pressure).

Important interactions

Tell your pharmacist/clinician if you use any of the following:

• Alpha-blockers (for prostate symptoms or high blood pressure). Combined effects may cause dizziness or low blood pressure.
• Strong CYP3A4 inhibitors (some antifungals like ketoconazole/itraconazole; some antibiotics/antivirals). These can raise blood levels and increase side effects.
• Strong CYP3A4 inducers (some treatments for epilepsy and certain infections). These may reduce effectiveness.
• Other PDE5 inhibitors: Do not combine with additional sildenafil/vardenafil/tadalafil products.
• Blood pressure medicines: The combination may increase the chance of low blood pressure symptoms.

Herbal and “natural” products

Herbal supplements (especially those marketed for sexual enhancement) may interact with PDE5 inhibitors. If you use supplements, consider discussing them with a pharmacist before combining.

Indications and expected benefits

Silvitra is designed to help men with ED. When sexual stimulation occurs, it can:

• Improve the ability to achieve an erection
• Help maintain an erection for satisfactory sexual activity
• Support confidence by improving erectile function for some men

ED has many underlying causes, including vascular health, diabetes, hormonal factors, stress, and medication side effects. If ED persists, it can be helpful to seek medical advice to identify the cause.

Practical use tips (to get the best results)

• Plan timing: Try taking it about 30–60 minutes before you expect to be sexually active.
• Start with a clear head: Avoid heavy alcohol and avoid driving if you feel dizzy.
• Use sexual stimulation: The medicine works best when you’re aroused.
• Consider meal effects: If you eat a heavy meal, allow more time before intimacy or choose a lighter meal.
• Don’t “test” too often: If you don’t get expected results after one attempt, avoid repeated dosing within short intervals; reassess factors like food, alcohol, and interactions.
• Stay within guidance: Do not increase the dose or frequency to “compensate.”

Safety profile and side effects

Like all medicines, Silvitra can cause side effects. Most are mild to moderate and resolve as the medicine wears off. However, serious side effects can occur, especially with interactions or in people with certain medical conditions.

Common side effects

• Headache
• Flushing (warmth/redness of skin)
• Indigestion or stomach discomfort
• Dizziness
• Nasal congestion (blocked nose)
• Visual disturbance (e.g., slight blurring or increased light sensitivity in some people)
• Back pain or muscle aches (more common with PDE5 inhibitors in general)

Less common but serious side effects

• Priapism (an erection lasting longer than intended, typically >4 hours)
• Sudden vision loss or a serious change in vision
• Sudden hearing impairment or ringing in the ears
• Severe dizziness, fainting, or symptoms of dangerously low blood pressure
• Chest pain or worsening heart symptoms

When to get urgent medical help

• If you have an erection lasting more than 4 hours, seek urgent medical care.
• If you experience chest pain, collapse, severe shortness of breath, or severe dizziness, seek emergency care.
• If you notice new sudden vision or hearing problems, get urgent advice immediately.

Safety in special populations

• Older adults: Side effects may be more noticeable. Your clinician may advise careful dosing.
• Liver impairment: Reduced metabolism can increase blood levels and side effects; suitability may be limited.
• Kidney impairment: Dose adjustment may be required depending on severity.
• Cardiovascular disease: Sexual activity itself can stress the heart. If you have heart disease, get medical advice on whether PDE5 inhibitors are suitable.
• History of stroke/heart attack: Discuss with a clinician, particularly if recent.

Alternative options for erectile dysfunction (UK)

ED can be treated in different ways depending on the cause, your medical history, and preferences. Options may include:

• Other PDE5 inhibitors: For example, sildenafil alone, tadalafil, or vardenafil alone—choice depends on onset/duration and tolerability.
• Lifestyle changes: Managing weight, improving exercise tolerance, stopping smoking, moderating alcohol, and reducing stress can improve ED.
• Address underlying conditions: Diabetes control, reviewing medications that may cause ED, and hormone assessment where appropriate.
• Psychological support: Anxiety/performance stress can contribute to ED. Counselling can be helpful.
• Other medical treatments (specialist-led): Vacuum erection devices, intra-cavernosal therapies, or penile implant surgery in select cases.

A pharmacist or clinician can advise which approach is most appropriate for you and whether Silvitra is a safe fit.

Market and legal context in the United Kingdom (patient overview)

In the UK, medicines are regulated and controlled to protect patient safety and ensure proper supply. The way ED medicines are offered online can vary depending on whether they are prescription-only or available through authorised routes.

For online purchases, reputable suppliers should provide:

• Clear product information (active ingredients and strength)
• Transparent terms about delivery, returns, and customer support
• Compliance with UK data protection and safe ordering practices
• Access to consultation/screening processes where required

If you are unsure about legality or safety, choose a UK-registered online pharmacy and verify that the product is sourced from legitimate channels.

Recent guidance and healthcare expectations (general)

UK healthcare guidance generally emphasises:

• Risk screening before PDE5 inhibitors are used (heart health, nitrates/contraindications, medication review)
• Safe use and avoiding dangerous combinations
• Encouraging people with persistent ED to seek medical advice to identify underlying causes

If your ED is new or worsening rapidly, or you have symptoms like chest pain on exertion, breathlessness, or fainting, you should get medical advice promptly rather than relying on medication alone.

Delivery, availability and what to expect

Availability of specific strengths and brands can change due to supply and regulatory requirements. When ordered from a legitimate UK online pharmacy, you can typically expect:

• Discreet packaging for privacy
• Tracked delivery options (where offered)
• Estimated delivery times shown at checkout
• Product shelf-life information may be available on the listing

If your order is delayed, contact the pharmacy’s support team. Do not accept unknown substitutions. Ensure the product name and strength match the listing.

Practical checklist before taking Silvitra

• Confirm you have no history of the major contraindications (especially nitrates/poppers).
• Review your current medicines for interactions (including alpha-blockers and CYP-affecting drugs).
• Plan for the right timing—avoid heavy meals immediately beforehand.
• Keep alcohol minimal.
• Allow yourself to be in a safe environment in case dizziness occurs.

FAQ

How long does Silvitra take to work?

Many people notice effects within 30 to 60 minutes. Peak effect is often around 1 to 2 hours. Heavy meals may delay onset.

How long do the effects last?

Duration varies by person and depends on factors like food, alcohol, and other medicines. Many people experience effects for several hours, though the strongest effects usually occur earlier.

Can I take Silvitra every day?

ED medicines are typically taken only when needed and not more frequently than recommended by the product guidance. If you think you need it more often, speak to a clinician for advice and to review the cause of ED.

Can I combine Silvitra with tadalafil or other ED treatments?

You should not combine multiple PDE5 inhibitors (for example, sildenafil with tadalafil or another sildenafil/vardenafil product). Doing so can significantly increase the risk of side effects.

Is it safe to take Silvitra with blood pressure medicines?

Some blood pressure medicines can increase the likelihood of low blood pressure symptoms when combined with PDE5 inhibitors. Discuss your current medications with a pharmacist, especially if you use alpha-blockers.

What if I miss the timing window?

If you’re already beyond the usual 30–60 minute window, wait rather than taking extra doses. Follow the labelled guidance and try adjusting timing for a future occasion.

Can I use Silvitra if I have diabetes or high cholesterol?

Many people with diabetes or cardiovascular risk factors can use PDE5 inhibitors safely, but it depends on overall heart health and medication profile. A clinician or pharmacist can help assess suitability.

What should I do if I get side effects?

Mild effects such as flushing or headache often settle. If side effects are severe, persistent, or you feel faint, seek medical advice. Never take another dose until you have guidance.

When is the erection “too long”?

Seek urgent medical care if an erection lasts for more than 4 hours (priapism).

Is Silvitra suitable for everyone?

No. PDE5 inhibitors are not suitable for everyone. People taking nitrates, those using certain “poppers,” and those with certain eye/heart conditions may be at higher risk. If you are unsure, consult a pharmacist or clinician before use.

Does Silvitra treat the underlying cause of ED?

Silvitra helps with erections during sexual stimulation but does not treat every underlying cause. Persistent ED should be discussed with a healthcare professional.

How should I store Silvitra?

Store tablets according to the instructions on the packaging (commonly at room temperature, away from moisture and direct sunlight). Keep out of the reach of children.

Important reminder

Silvitra contains strong doses of sildenafil and vardenafil. Use only as directed and avoid unsafe combinations—especially nitrates and recreational nitrites. If you have any concerns about suitability, side effects, or interactions, contact a healthcare professional or pharmacist for tailored advice.