Sildalis (Sildenafil Citrate 100 mg + Tadalafil 20 mg) — UK Patient Guide
Sildalis is a combination medicine containing sildenafil citrate 100 mg and tadalafil 20 mg. It is used to help men with erectile dysfunction (ED) achieve and maintain an erection when sexual stimulation occurs.
This guide explains how Sildalis works, when and how it’s typically taken, what to expect, and the main safety considerations—tailored for people in the United Kingdom.
Key product information
| Feature | Details |
|---|---|
| Medicine name | Sildalis |
| Active ingredients | Sildenafil citrate 100 mg + Tadalafil 20 mg |
| Medicine type | ED (erectile dysfunction) treatment |
| How it works | Improves blood flow to the penis (PDE-5 inhibitors) |
| Typical use | Helps achieve/maintain erection with sexual stimulation |
| Form | Tablet (strengths as stated above) |
Note: Always check the pack and label for your exact product details (e.g., strength, appearance, and tablet markings).
How Sildalis works (mechanism of action)
Sildalis contains two medicines from the same drug class: PDE-5 inhibitors. Both sildenafil and tadalafil help the body maintain higher levels of cGMP, which relaxes the smooth muscles in blood vessels.
In the penis, this relaxation improves blood flow, helping you get and keep an erection when you are sexually stimulated. Importantly, Sildalis does not create an erection without arousal—sexual stimulation is still required.
- Sildenafil: helps inhibit PDE-5 to support blood flow during sexual stimulation.
- Tadalafil: also inhibits PDE-5 and typically has a longer-lasting effect than sildenafil.
Pharmacokinetics (how the body processes the medicine)
Pharmacokinetics describes how the medicine is absorbed, distributed, metabolised, and eliminated. For PDE-5 inhibitors, key points are related to onset and duration.
Absorption and onset
- Sildenafil generally begins acting within about 30–60 minutes for many people.
- Tadalafil often starts working within about 30–60 minutes, with effects that may last longer.
Duration of action
Because the product combines both ingredients, many people experience a broader window of potential effectiveness. Individual responses vary based on metabolism, age, health conditions, and other medicines.
Metabolism and elimination
Both sildenafil and tadalafil are processed by the liver and cleared from the body. If you have significant liver impairment or certain drug interactions, levels may change—so safety is especially important.
What Sildalis is used for (indications)
Sildalis is used to treat erectile dysfunction (ED) in adult men. It helps address difficulty achieving or maintaining an erection sufficient for satisfactory sexual performance.
It is not used for:
- Improving sexual desire
- Treating infertility
- General “performance” enhancement in men without ED
- Women’s sexual health
Typical timing: when to take it
Timing affects how quickly the medicine starts working and how reliable the effect feels. As with many PDE-5 inhibitors, sexual stimulation is required.
- Common approach: take Sildalis about 30–60 minutes before planned sexual activity.
- If food is heavy: allow additional time because a full meal may delay absorption (see Food Interactions).
- Plan flexibility: because of the tadalafil component, the window may be longer than sildenafil alone.
Do not take more than the recommended dose or combine with other ED medicines.
Dosing guidance for adults
Sildalis is supplied as a fixed-dose combination tablet (sildenafil citrate and tadalafil). The exact dosing regimen should follow the instructions provided by your healthcare professional or the product documentation.
Typical single-dose use
For many ED treatments, a single dose taken prior to sex is used. Because this product combines two active agents at substantial strengths, it is generally intended for carefully selected use.
- Starting dose: follow the product instructions exactly.
- Frequency: avoid taking doses too close together.
- Missed timing: if it’s no longer needed for that occasion, wait and follow your planned schedule rather than “doubling up.”
If you are unsure about dosing, do not experiment. ED medicines can interact with other treatments and health conditions, so confirm what is appropriate for you.
Food interactions (including meals and absorption)
Food can affect how quickly PDE-5 inhibitors are absorbed. A heavy or high-fat meal may delay onset.
- Light meals may have less effect.
- Heavy meals can delay how soon the medicine works—consider taking it with more lead time.
- Grapefruit products are best avoided with many cardiovascular medicines due to potential interaction risk.
In general, for a more predictable effect, many people find it helpful to avoid a large fatty meal around the time of dosing.
Alcohol and medicine interactions
Alcohol
Alcohol can affect erectile function and increase dizziness, especially if you also experience a drop in blood pressure from PDE-5 inhibitors. Small amounts of alcohol may not cause issues for everyone, but higher intake can reduce reliability of the erection response.
- Avoid drinking heavily before sexual activity.
- Be cautious if you feel light-headed or unwell after taking the medicine.
Medicine interactions (important safety section)
The combination of sildenafil and tadalafil can interact with medications that affect blood pressure or the liver enzymes that metabolise PDE-5 inhibitors. Some interactions may be dangerous.
Absolute or high-risk interactions
- Nitrates (for example, glyceryl trinitrate / GTN or isosorbide preparations) used for chest pain: combining with PDE-5 inhibitors can cause a potentially dangerous drop in blood pressure.
- Riociguat (for pulmonary hypertension): a severe blood-pressure interaction may occur.
Common classes that require careful medical advice
- Alpha-blockers for prostate symptoms or hypertension (e.g., tamsulosin, doxazosin): the combination can increase the risk of dizziness or low blood pressure.
- Antihypertensives (blood pressure medicines): additional blood pressure lowering may occur.
- “Booster” or strong enzyme inhibitors that affect metabolism (e.g., some antifungals and antibiotics): they may increase PDE-5 levels and raise side-effect risk.
- Other ED treatments (including PDE-5 inhibitors): do not combine.
- Drugs that affect heart rhythm or have significant cardiovascular effects: use caution and seek advice.
If you take multiple medicines for heart, blood pressure, or prostate, check the interaction risks carefully with a healthcare professional.
Safety profile: what to watch for
Like all medicines, Sildalis can cause side effects. Most are mild to moderate, but some symptoms require urgent medical attention.
Common side effects
- Headache
- Flushing (warmth/redness)
- Indigestion or nausea
- Blocked nose
- Dizziness
- Back pain or muscle aches (more typical with tadalafil-class medicines)
- Visual disturbances (e.g., changes in colour perception or blurred vision in some people)
Serious side effects (seek urgent help)
- Chest pain, severe shortness of breath, fainting, or severe dizziness—especially after taking the medicine.
- Prolonged erection (priapism) lasting more than 4 hours. This is a medical emergency.
- Sudden vision loss or sudden significant reduction in vision.
- Sudden hearing changes or ringing in the ears.
- Severe allergic reaction (swelling of face/lips, trouble breathing, widespread rash).
If any of the serious events above occur, stop using the medicine and seek immediate medical advice.
Who should take extra caution?
Discuss use with a healthcare professional if you have any of the following:
- Significant heart disease or unstable cardiovascular conditions
- Very low or unstable blood pressure
- Recent stroke or heart attack (timing varies; professional guidance is important)
- Severe liver or kidney impairment
- History of priapism or certain blood disorders
- Retinitis pigmentosa or inherited retinal conditions
Practical use tips (how to make it work better)
- Use sexual stimulation: PDE-5 inhibitors improve blood flow, but arousal is still required.
- Start with a calm plan: reduce anxiety and allow enough time for the medicine to take effect.
- Avoid heavy meals beforehand: if you notice delayed effect, try taking it earlier or with lighter food.
- Limit alcohol: heavy drinking can undermine erectile quality.
- Check your medications: confirm there are no dangerous interactions—especially nitrates and riociguat.
- Don’t “stack” doses: taking extra tablets increases risk without improving safety.
- Think about the timing: if you’re consistently missing the window, discuss timing adjustments with a professional.
If Sildalis doesn’t help on the first attempt, it may be due to timing, food/alcohol, stress, or interaction factors. However, persistent lack of effect should prompt medical review rather than repeated experimentation.
Alternative options (for ED management)
In the UK, ED treatments commonly include PDE-5 inhibitors (sildenafil, tadalafil, vardenafil) and non-medicine approaches. If Sildalis is not suitable or not effective, alternatives may include:
Other PDE-5 inhibitors
- Sildenafil (often shorter onset/duration compared with tadalafil)
- Tadalafil (often longer duration)
- Vardenafil (another PDE-5 option)
Non-medicine options
- Lifestyle changes (weight management, exercise, smoking cessation)
- Addressing causes (e.g., diabetes control, stress, sleep issues)
- Psychological support where anxiety/performance pressure plays a role
- Devices or other treatments as recommended by clinicians
Choice depends on your medical history, other medicines, and whether you prefer an “as-needed” or longer planning window.
Market and legal context in the United Kingdom
In the UK, medicines for erectile dysfunction are regulated by UK medicines law and require appropriate supply routes. Pharmacies online must operate within legal frameworks for safe distribution and patient information.
UK guidance and safety standards emphasise:
- Patient eligibility checks (to reduce risks and interactions)
- Clear usage instructions and warnings about nitrates/riociguat
- Safeguarding against unsafe or counterfeit products
- Ongoing pharmacovigilance (reporting of adverse reactions)
If purchasing online, ensure the provider displays clear business details and follows legitimate UK pharmacy practices.
Recent guidance and safety reminders
Safety messaging across the UK consistently reinforces key points for PDE-5 inhibitors:
- Do not use nitrates (and avoid riociguat) with PDE-5 inhibitors because of dangerous blood-pressure interactions.
- Use caution with alpha-blockers and blood pressure medicines.
- Seek urgent care for priapism or sudden vision/hearing changes.
- Be careful with strong interacting medications (particularly certain antifungals/antibiotics and liver enzyme inhibitors).
Because Sildalis combines two PDE-5 inhibitors, the need to follow safety guidance and avoid unsafe combinations is even more important.
Delivery and availability
Availability and delivery times can vary by supplier and stock status. When ordering online in the UK, typical considerations include:
- Delivery options (standard vs express), where offered
- Discreet packaging for privacy
- Order processing times (often depend on verification steps)
- Cold-chain needs (most tablets do not require refrigeration)
After dispatch, you may receive tracking details. Please check the product listing for current delivery estimates and any regional limitations.
Storage and handling
- Store tablets in the original packaging and keep them tightly closed.
- Keep out of the sight and reach of children.
- Store at a reasonable room temperature and protect from excessive moisture and heat.
- Check the expiry date on the pack.
FAQ — Sildalis in the UK
1) How quickly does Sildalis start working?
Many people notice effects within 30–60 minutes. A heavy meal can delay onset, so consider lighter food and appropriate timing.
2) How long does Sildalis last?
Because it includes both sildenafil and tadalafil, the effectiveness window may feel longer than sildenafil alone. Individual duration varies depending on health, metabolism, and other factors.
3) Can I take Sildalis every day?
Follow the specific dosing instructions provided for your product and your situation. Do not exceed the recommended frequency. Many ED treatments are used as-needed, but dosing schedules vary.
4) Can I combine Sildalis with other ED medicines?
No. Combining ED medicines—especially other PDE-5 inhibitors—is not recommended due to increased risk of side effects and unsafe blood-pressure changes.
5) Is Sildalis safe with my heart medicines?
Some heart and blood pressure medicines interact strongly with PDE-5 inhibitors. Particularly avoid nitrates and riociguat. If you take any cardiovascular medicines, review your list carefully with a healthcare professional.
6) What if it doesn’t work the first time?
Lack of effect can be due to timing, heavy food/alcohol, anxiety, or medication interactions. If it consistently doesn’t work, stop repeated experimentation and get medical advice.
7) What should I do if I have dizziness?
Sit or lie down and avoid standing quickly. Dizziness can be related to blood pressure changes, especially with alcohol or other medications. Seek urgent help if symptoms are severe or you faint.
8) Can Sildalis be used with alcohol?
Light amounts may be tolerated by some people, but heavy alcohol can reduce erectile performance and increase dizziness. Keep alcohol moderate and avoid intoxication.
9) Are there dietary restrictions?
A heavy meal may delay effect. Grapefruit and other potent interacting foods/drinks may increase risk with some medicines—so it’s best to be cautious.
10) What is priapism and what should I do?
Priapism is a prolonged erection lasting more than 4 hours. It is a medical emergency—seek urgent help immediately.
11) Can women take Sildalis?
This product is designed for men with erectile dysfunction. Do not use it if you are not the intended patient group.
12) Where can I get help in the UK?
If you have questions about suitability, side effects, or safety concerns, you can contact a qualified healthcare professional. For urgent symptoms, use NHS services (e.g., NHS 111 for urgent advice) or emergency care when needed.
Important reminders
- Do not use Sildalis with nitrates or riociguat.
- Check interactions with blood pressure medicines and alpha-blockers.
- Seek urgent care for priapism or sudden vision/hearing changes.
- Use caution with alcohol and avoid heavy drinking.
- Follow dosing instructions and do not exceed recommended frequency.
If you have any uncertainty about whether Sildalis is suitable for you—especially due to existing health conditions or other medications—seek professional advice before using.
