Silvitra (Sildenafil Citrate 100 mg + Vardenafil 20 mg) – Patient Information (Australia)
Silvitra is an oral medicine that combines two well-known treatments for erectile dysfunction: sildenafil citrate and vardenafil. It is designed to help men achieve and maintain an erection when sexual stimulation is present. This page explains how Silvitra works, how it is typically used, key safety information, interactions, and practical tips for use in Australia.
Important: Always read the product packaging and follow the advice of a qualified healthcare professional. Do not use multiple medicines from the same class at the same time.
Quick Facts
- Medicine: Silvitra
- Active ingredients: Sildenafil citrate 100 mg + Vardenafil 20 mg
- Use: Erectile dysfunction (difficulty achieving/maintaining an erection)
- How it works: Improves blood flow to the penis by enhancing nitric oxide signalling
- Onset: Often within 30–60 minutes (varies by person and food intake)
- Duration: Effects may last several hours
- Not for everyone: Avoid in certain heart and nitrate-medication conditions
What is Silvitra?
Silvitra contains a combination of: sildenafil citrate 100 mg and vardenafil 20 mg. These are members of the phosphodiesterase type 5 (PDE5) inhibitor class. PDE5 inhibitors support erections by improving blood flow in response to sexual stimulation.
Silvitra is taken by mouth. It is commonly used by men who experience erectile dysfunction. Erectile dysfunction can have physical or psychological causes, and the safest approach is to identify underlying contributors.
How It Works (Mechanism of Action)
Erection involves increased blood flow to the penis. A key chemical messenger in this process is nitric oxide (NO). When sexual stimulation occurs, the body releases NO, which activates a pathway that increases cGMP. Higher cGMP levels relax smooth muscle and allow more blood to enter and remain in the erectile tissue.
Sildenafil and vardenafil work by inhibiting PDE5, the enzyme that breaks down cGMP. By slowing cGMP breakdown, they help the erection response last longer and become more achievable.
- Both components do not create an erection on their own.
- They work best when there is sexual stimulation.
- They primarily support blood-flow and vessel relaxation rather than directly affecting libido.
Pharmacokinetics (Absorption, Onset, and Duration)
Individual response varies based on age, metabolism, liver and kidney function, and whether it is taken with food. In general, PDE5 inhibitors reach peak blood levels within about 30–120 minutes.
| Aspect | What to expect (typical) |
|---|---|
| Absorption | Oral absorption; peak levels generally within ~30–120 minutes depending on the component and patient factors |
| Onset of effect | Often within 30–60 minutes; can be sooner or later |
| Duration | Effects may last several hours; some men report effectiveness across a wider window |
| Metabolism | Primarily metabolised by the liver enzymes (notably CYP pathways) |
| Elimination | Metabolites cleared through the body (kidneys and bile); half-life differs by component and individual factors |
Because this product combines two PDE5 inhibitors, the overall effect and side-effect profile may feel stronger or longer than single-ingredient options. If you are sensitive to PDE5 inhibitors, discuss lower-dose alternatives with a healthcare professional.
What is Silvitra Used For?
Silvitra is indicated for erectile dysfunction, meaning persistent or recurrent inability to achieve or maintain an erection sufficient for satisfactory sexual activity.
If erectile dysfunction is sudden, associated with pain, or comes with other warning symptoms (such as chest pain during sex), it should be assessed promptly—especially because some heart conditions can present through sexual activity.
Typical Use and Timing
How to take it
- Take Silvitra by mouth with water.
- Use it only when you plan to have sexual activity.
- Sexual stimulation is required for the medicine to work.
Timing
Many men find the best results when they take Silvitra about 30 to 60 minutes before planned sexual activity. However, individual responses vary, and food intake can delay onset.
- With a light meal: onset may be closer to the expected window
- With a heavy or fatty meal: onset may be delayed
- Empty stomach: may help some men achieve earlier effects
How often
Follow the dosing instructions on the product packaging or as directed by a healthcare professional. Do not take more than recommended. Taking multiple PDE5 inhibitors together (or exceeding the dose) increases the risk of side effects.
Dosing (Adults)
Silvitra is supplied in a fixed combination strength: sildenafil citrate 100 mg + vardenafil 20 mg. Because this combination is higher in active content than many single-ingredient products, it may not be suitable for everyone.
Typical starting approach: Many men start on a single dose and assess response and tolerability on a first-use occasion under guidance. If you have previously used PDE5 inhibitors, discuss whether this strength is appropriate.
- Do not combine Silvitra with other PDE5 inhibitors (e.g., additional sildenafil, vardenafil, tadalafil).
- Do not exceed the recommended frequency.
- If you miss a dose, do not “double up.” Take it only when you plan sexual activity.
If you need ongoing treatment or have frequent erectile dysfunction, it can be helpful to review options such as lifestyle measures and treatment selection (including different PDE5 inhibitors or lower doses).
Food Interactions (Including Fatty Meals)
Food can affect how quickly PDE5 inhibitors are absorbed. In general:
- Fatty or heavy meals may slow absorption and delay onset.
- Light meals usually have less impact.
- Avoid taking with large meals immediately before sex if you want predictable timing.
The medicine may still work after a meal, but it may take longer to become effective.
Alcohol and Interactions
Alcohol
Moderate-to-heavy alcohol intake can worsen erectile dysfunction by affecting nerve function, circulation, and sexual performance. It can also increase the likelihood of side effects such as dizziness or low blood pressure.
- For best results, keep alcohol to a moderate level.
- Avoid excessive alcohol—especially when trying the medicine for the first time.
Alcohol + Silvitra together
Combining alcohol with PDE5 inhibitors may increase the risk of dizziness, headache, or feeling faint. If you feel light-headed, sit or lie down and seek medical advice if symptoms persist.
Medication Interactions and Safety Considerations
Do NOT use with nitrates
PDE5 inhibitors can dangerously lower blood pressure when combined with nitrates. Do not take Silvitra if you use nitrate medicines for chest pain (angina) or heart conditions. Examples include:
- Glyceryl trinitrate (GTN)
- Isosorbide mononitrate / isosorbide dinitrate
- “Poppers” (amyl nitrite, amyl nitrite-like inhalants)
Alpha-blockers (for prostate or blood pressure)
Some men take alpha-blockers such as tamsulosin or doxazosin. Combination with PDE5 inhibitors can increase the risk of low blood pressure, especially when starting treatment or adjusting doses.
- Discuss timing and dose stability with a healthcare professional.
- Be cautious when standing up quickly after taking the medicine.
Blood pressure medicines
PDE5 inhibitors may enhance the blood-pressure-lowering effect of some medications, particularly when combined with multiple antihypertensives. This can contribute to dizziness or fainting.
Strong liver enzyme inhibitors (CYP inhibitors)
Some medicines can increase blood levels of PDE5 inhibitors by affecting liver enzymes (often CYP pathways), increasing both effect and side effects. Examples (not exhaustive) include:
- Some antifungals (e.g., ketoconazole, itraconazole)
- Some antibiotics (e.g., clarithromycin)
- Protease inhibitors used for HIV
- Some medicines for hepatitis C
Other erectile dysfunction medicines
Do not combine Silvitra with other PDE5 inhibitors. Using more than one PDE5 inhibitor can increase the risk of:
- marked low blood pressure
- headache
- flushing
- visual side effects
Riociguat
PDE5 inhibitors may interact with riociguat (used for pulmonary arterial hypertension). Avoid this combination unless a clinician specifically advises it.
Illicit substances (“recreational” drugs)
Using PDE5 inhibitors with illicit stimulants (such as “poppers,” or other substances affecting blood vessels) can be unsafe and is strongly discouraged.
Indications and Who May Need Extra Caution
Silvitra is for erectile dysfunction. However, not everyone is suitable. Extra caution is needed or medical advice should be sought if you have any of the following:
- Heart disease, especially unstable angina, recent heart attack, or severe heart failure
- Low blood pressure or episodes of fainting
- Recent stroke
- Serious liver impairment
- Severe kidney impairment
- Blood disorders that increase risk of priapism (prolonged erection), such as sickle cell disease
- Existing eye conditions (e.g., non-arteritic anterior ischaemic optic neuropathy history)
- Any condition where sexual activity is medically discouraged
If you have diabetes, high cholesterol, or hypertension, erectile dysfunction can be a sign of vascular disease. Consider discussing cardiovascular risk assessment with your GP.
Safety Profile (Common and Serious Side Effects)
Common side effects
Most side effects are mild to moderate and improve as your body adjusts. Possible common effects include:
- Headache
- Flushing (warmth/redness)
- Dizziness
- Indigestion or nausea
- Nasal congestion
- Back pain or muscle aches (more commonly reported with some PDE5 inhibitors)
Less common but important effects
- Visual disturbances (e.g., blurred vision, increased sensitivity to light)
- Palpitations
- Low blood pressure symptoms (light-headedness on standing)
Seek urgent medical help if you experience
- Chest pain or symptoms of a heart problem during/after sex
- Fainting or severe dizziness
- Sudden vision loss or serious eye pain
- Priapism (erection lasting 4 hours or longer)
- Severe allergic reactions (swelling of face/lips, difficulty breathing, widespread rash)
Practical Tips for Safer, More Effective Use
- Try when you are well: First use is best when you can safely rest afterward.
- Stay hydrated: Dehydration can worsen dizziness.
- Limit alcohol: Helps avoid low blood pressure and poor erection quality.
- Plan around food: Avoid very heavy meals right before taking it.
- Allow time: If it doesn’t work immediately, you may need to give it enough time within the usual onset window.
- Be realistic about variability: Stress, fatigue, smoking, and cardiovascular health can affect results.
- Don’t “test repeatedly” too quickly: Give your body time to respond; excess dosing increases risk.
- Check all medicines: Review over-the-counter products and supplements for interactions.
Lifestyle improvements can improve erectile function over time, including regular exercise, weight management, reducing smoking, moderating alcohol, and managing stress and sleep.
Alternative Options (Depending on Your Needs)
Erectile dysfunction treatments vary in onset, duration, dosing flexibility, and side-effect profile. Common alternatives include:
- Single PDE5 inhibitors (different active ingredients and strengths)
- Tadalafil (often used for longer duration; dosing frequency can differ)
- Non-PDE5 options if PDE5 inhibitors are unsuitable (your clinician can advise)
- Vacuum erection devices or other mechanical aids
- Psychological support if performance anxiety or relationship factors are involved
Because Silvitra uses two PDE5 inhibitors in a single dose, some men may prefer a single-ingredient option at a lower strength to better balance effectiveness and tolerability. Discuss your medical history before selecting a product.
Market and Legal Context for Australia
In Australia, medicines are regulated under the Therapeutic Goods Administration (TGA) framework. Products sold in Australia must comply with applicable requirements for safety, quality, and supply.
Availability can vary depending on whether a medicine is registered, assessed, or supplied through different channels. Always use reputable sources and ensure product details (active ingredients, strength, batch/expiry information, and manufacturer information) are clearly provided.
If you are ordering online, check that the supplier complies with Australian consumer and regulatory expectations. For personal safety, avoid unverified products with missing or unclear ingredient information.
Note on guidance: Treatment of erectile dysfunction should consider overall cardiovascular risk. Many clinicians advise screening for underlying heart disease risk factors, particularly when erectile dysfunction is new or worsening.
Recent Guidance and Clinical Considerations
In recent years, clinical practice has emphasised:
- Cardiovascular risk assessment for men presenting with erectile dysfunction
- Medication reconciliation to prevent dangerous interactions (especially nitrates)
- Appropriate selection and dosing of PDE5 inhibitors based on comorbidities and tolerance
- Monitoring for side effects and discontinuation if serious symptoms occur
- Individualised care rather than “one-size-fits-all” dosing
If you have diabetes, hypertension, cardiovascular disease, neurological conditions, or take multiple medications, it is especially important to review suitability before use.
Delivery and Availability (Online Pharmacy Information)
Availability of Silvitra may depend on stock and supplier arrangements. When ordering online in Australia, a reputable pharmacy should provide:
- clear product name and strength
- active ingredients and ingredient listing
- expiry date and batch/lot number (when applicable)
- secure checkout and clear shipping information
- delivery timeframes and tracking options
Packaging: Please store the medicine according to the instructions on the pack (typically at room temperature, away from moisture and heat).
If you need urgent access, check with the pharmacy about dispatch times and delivery estimates to your area.
FAQ
1) How soon will Silvitra work?
Many men notice an effect within 30–60 minutes. A heavy or fatty meal can delay onset. If you don’t feel effects at the expected time, avoid taking extra doses immediately—follow recommended dosing guidance.
2) How long does Silvitra last?
Effects may last for several hours. The duration varies between individuals and can be influenced by age, food, alcohol intake, and other medicines.
3) Can I take Silvitra with food?
Yes, but for predictable timing, consider taking it with a light meal or on a relatively empty stomach. Heavy meals may delay absorption and onset.
4) Is it safe to drink alcohol?
Light to moderate alcohol may be tolerated by some men, but alcohol can worsen erection quality and increase dizziness. Avoid heavy drinking, especially when trying Silvitra for the first time.
5) What medicines should I avoid?
Avoid Silvitra if you use nitrates (including GTN/isosorbide medicines) or if you are advised not to use PDE5 inhibitors. Also use caution with alpha-blockers, multiple blood-pressure medicines, and medicines that affect liver enzymes (some antifungals and antibiotics). If you are unsure, check your medicine list with a healthcare professional.
6) Can I take it more than once a day?
Do not exceed the recommended frequency on the product packaging or as advised by a healthcare professional. Taking PDE5 inhibitors too frequently increases the risk of side effects.
7) What if it doesn’t work for me?
Erectile dysfunction has many causes. If Silvitra doesn’t help, discuss:
- whether your underlying health conditions need attention
- whether another PDE5 inhibitor or lower dose may suit you better
- lifestyle factors such as smoking, stress, and cardiovascular health
8) What are the warning signs that mean I should stop and seek help?
Seek urgent help for chest pain, fainting, serious vision problems, priapism (erection lasting 4 hours or longer), or signs of an allergic reaction.
9) Is Silvitra for women or children?
Silvitra is intended for adult men with erectile dysfunction. It is not indicated for women or children.
10) How should I store Silvitra?
Store at room temperature as indicated on the packaging, away from moisture and heat, and keep out of reach of children. Check the expiry date before use.
Final Safety Note
Silvitra may be helpful for erectile dysfunction, but safety depends on your health history and current medications. Because PDE5 inhibitors can interact with medicines that affect blood pressure and blood vessels, it’s essential to review all medications before use. If you have concerns or experience serious side effects, seek medical advice promptly.
