Sildenafil citrate, commonly known by the brand name, is a prescription-only medicine used to treat erectile dysfunction (ED) in adult men. It works by improving blood flow to the penis, helping to achieve and maintain an erection during sexual activity.
Sildenafil is available in 25mg, 50mg, and 100mg strengths.
Sildenafil has been shown to be effective in up to 80% of men with ED, with effects typically noticeable within 30 to 60 minutes, and lasting for up to 4–5 hours.
Common side effects include:
Less common but serious effects include visual disturbances, hearing changes, or prolonged erections. Seek medical attention if severe or persistent side effects occur.
Sildenafil should not be used by those:
Inform your doctor of all medications and supplements before use. Interactions may occur with:
Avoid excessive alcohol while taking sildenafil, as it can lower blood pressure and increase side effect risk. Use with caution if you have any heart-related conditions.
Sildenafil is available by prescription only in the UK.
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The original article was published on 23 May 2025.
Sildenafil is a prescription-only medication for men with erectile dysfunction. It is available in 25mg, 50mg, and 100mg strengths. Sildenafil is also available in generic form. It is available in generic form in 50mg strength. Generic sildenafil is available by prescription only in the UK.
If you are someone who suffers from an erection problem, you're probably familiar with the term "erectile dysfunction". This is a condition that means that you're unable to get, maintain and/or get an erection. It's a common problem that affects millions of men all over the world. Fortunately, there are several treatment options available for men who suffer from this issue.
According to the American Society for Sexual Medicine (ASSM), men who suffer from an erection problem can now benefit from the following treatments:
is one of the most well-known and widely used treatments for an erection problem. It works by increasing blood flow to the penis, which helps men to get and keep an erection. It's available in various forms such as sildenafil, Tadalafil, and Tadalafil + Sildenafil. It is usually taken about 30 minutes before sexual activity, and it is typically taken for up to 4 hours after the drug has been ingested.
is another popular treatment for an erection problem. It belongs to a class of drugs known as phosphodiesterase type 5 (PDE5) inhibitors. Tadalafil works by increasing blood flow to the penis during sexual stimulation, which helps men to achieve and maintain an erection. It is available in various forms such as Tadalafil, Cialis, and Tadalafil + Cialis tablets.
It works by increasing blood flow to the penis, which helps men to achieve and maintain an erection. It is available in various forms such as Viagra, Tadalafil, and Tadalafil + Sildenafil. It is usually taken for up to 4 hours after the drug has been ingested.
It is available in various forms such as Cialis, Tadalafil, and Tadalafil + Cialis tablets.
It is available in various forms such as Viagra, Tadalafil, and Tadalafil + Cialis tablets.
Viagra Connect is available in Ireland for erectile dysfunction treatment which does not require a prescription. The first of its kind, Viagra Connect is a safe and discreet over-the-counter medication that can legally be bought online or over the counter in your pharmacy, without a trip to your doctor.
We need to ensure that this medicine is suitable for the person it is intended for. Therefore, it should only be purchased by the person taking it.
You can select your convenient store to collect your product and fill in the online form required.APharmacist will contact you to let you know your product is ready for collection, or you can buy onlineand complete the questions included.
When purchased online, a pharmacist will contact you by phone if they have any further questions and to advise you on the safe use of this medicine. If they are unable to speak to you when required your order may be delayed or the pharmacy medicine part of your order cancelled.
Please ensure your contact details are correct before ordering this medicine.Suitable for
Viagra Connect is for men 18 years and older who have difficulty getting and/or keeping an erection hard enough for sex
Age RestrictionYou must be at least 18 years old to purchase this product.
Directions for use:
Please read the enclosed leaflet carefully before use.
• take 1 tablet approximately one hour before sexual activity• swallow tablet whole with water• do not take more than 1 tablet a dayViagra Connect starts to work within 30-60 minutes. You may take it up to 4 hours before sexual activity.
Hazards and Cautions
Do NOT take if you:
Talk to your pharmacist or doctor before taking if you:
Objective:To assess the pharmacological efficacy and safety of sildenafil (Viagra) 50 mg in patients with erectile dysfunction (ED) and to evaluate the therapeutic effect of sildenafil in men with ED and its clinical implications.
Method:A retrospective review was conducted in 17 men with erectile dysfunction (ED) and the safety of sildenafil in these patients was assessed.
Results:The safety of sildenafil in men with ED was similar to that of sildenafil in men without ED, with the exception of the frequency of sexual activity (P<0.05).
Conclusion:Sildenafil has been found to be effective in men with ED and to be safe and well tolerated in men with ED. Sildenafil is well tolerated in men with ED and is likely safe.
Sildenafil in men with EDSildenafil was studied as an initial treatment for ED. It is important to note that the effectiveness of sildenafil in the treatment of ED can be extrapolated from the pharmacological effect of sildenafil. Sildenafil is a phosphodiesterase type 5 (PDE-5) inhibitor. It works by relaxing the smooth muscle and inhibiting cyclic guanosine monophosphate (cGMP). It also blocks PDE-5. Sildenafil has a high rate of absorption in the GI tract and is therefore less likely to be absorbed by the esophagus. The usual dosage of sildenafil for ED is 50 mg to 100 mg per day. The effects of sildenafil in patients with ED and in men with ED have not been adequately studied.
ED and ED and clinical implicationsPatients with ED
ED is a common condition in patients with ED. It can be a very distressing condition, causing them to feel very uncomfortable and at times unbearable. It can be life-threatening and may lead to a long-term (6-12 months) or permanent (1-2 years) relapse. ED is associated with several health risks, including low blood pressure, high cholesterol, diabetes, heart disease, nerve damage, and prostate cancer. The most common adverse reactions are headache, dizziness, muscle ache, stomach pain, indigestion, and nausea. There are few controlled studies regarding the safety and efficacy of sildenafil for ED in these patients.
Sildenafil and ED
Sildenafil (Viagra) is the only FDA-approved drug for the treatment of ED. It is FDA-approved for the treatment of ED (based on the FDA approval criteria) in 1998. However, there are limited pharmacological studies evaluating sildenafil in ED and in the treatment of ED. The safety and efficacy of sildenafil were evaluated in patients with ED and in men with ED. Sildenafil has been shown to be well tolerated in men with ED and to be safe and well tolerated in men with ED. Sildenafil is well tolerated in men with ED and to be safe and well tolerated in men with ED. Sildenafil is safe and well tolerated in men with ED and to be safe and well tolerated in men with ED.
The usual dosage of sildenafil for men with ED is 50 mg to 100 mg per day.
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A medication approved by the Food and Drug Administration to treat erectile dysfunction, also known as impotence. Erectile dysfunction (ED) is the inability to get or keep an erection. It can be caused by physical, psychological, or a combination of both. If you're experiencing early signs of an that may become apparent at any time, consult your doctor. If you have a weakened immune system, disease or injury, or are currently pregnant or trying to conceive, than seek immediate medical help. This is due to the effects of the medication's active ingredients, sildenafil (the active ingredient in Viagra) and tadalafil (the active ingredient in Cialis), causing the body to take more of the active ingredient's active ingredient than it actually is. This is why you may be asked to try different ED medications or ED treatments, depending on what you're using it for. For more information, see the "How to Order" section.
| Appference & Risks | Potential side effects and cautions associated with use of sildenafil |
|---|---|
| Risks | |
| Personal and/or family medical history | Certain medications may interact with sildenafil and can increase its levels in the body, potentially causing side effects. These include riociguat, vericiguat, and dapoxetine |
| Kidney disease | These include certain blood thinners such as warfarin |
| Pregnancy | Certain medications may interact with sildenafil and can cause harm to the fetus or baby. This is especially the case with products for depression and anxiety that contain sildenafil |
| Brittle penis | Certain medications may interact with sildenafil and can cause harmful results for the male partner |
| Bleeding disorder | Certain medications may interact with sildenafil and can cause symptoms of bleeding disorders. |