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.
Don’t let ED affect your confidence or relationships. Buy Sildenafil tablets online today and experience more satisfying erections — securely, discreetly, and from our trusted UK-regulated pharmacy.
✅ Free online consultation✅ Fast UK delivery✅ Discreet packaging✅ GPhC-regulated
now and get back to enjoying intimacy with confidence.
Store Notice: Orders placed after 11:00 AM on Friday, 23 May 2025 will be processed on the next working day, Tuesday, 27 May 2025, due to the bank holiday weekend. Thank you for your understanding.
BuySildenafilOrderThe following table compares the physical properties of sildenafil citrate, its molecular structure and biological activity.
Sildenafil citrate
The chemical name of sildenafil citrate is sildenafil.
Sildenafil is a phosphodiesterase type 5 (PDE5) inhibitor, which works by increasing blood flow to the penis during sexual stimulation. This is achieved by increasing the amount of cyclic guanosine monophosphate (cGMP), which relaxes smooth muscle in the penis and increases blood flow to the penis during sexual stimulation. CGRP is a specific messenger in the brain that plays a role in regulating blood flow and blood flow in the penis.
CGRP is a naturally occurring chemical messenger that is found in the smooth muscle cells of the penis and in the corpus cavernosum of the brain. cGMP is a substance that relaxes and increases the blood flow to the penile region. It is released at a high rate in response to sexual stimulation and is used by both males and females to produce a natural response to sexual arousal. Sildenafil, however, is not the same as other PDE5 inhibitors, which inhibit the PDE5 enzyme. Sildenafil, however, has been used to treat pulmonary hypertension and benign prostatic hyperplasia, as well as to treat erectile dysfunction in men. Sildenafil has also been used to treat pulmonary hypertension in men.
In the sexual experience, erectile dysfunction is one of the most common problems that affect men in the world. This is because sexual stimulation is required for the erectile function to be restored, as well as for the ability to achieve and maintain an erection. Sildenafil has been used to treat erectile dysfunction and pulmonary hypertension, as well as to treat benign prostatic hyperplasia and pulmonary edema in men. In this way, it has also been used to treat erectile dysfunction.
Drug interactions
Sildenafil has interactions with other drugs, particularly with certain types of medicines used to treat the diseases associated with the blood flow regulation system. It is also known that sildenafil may have some interactions with some medicines that affect blood flow regulation systems. Drugs, including the following medicines, are known to interact with sildenafil.
Some of the most frequently observed interactions of sildenafil are related to the following classes of drugs:
Although the drug interactions of sildenafil are not all of the drugs that are known to interact with sildenafil, there is one drug that is known to interact with sildenafil. Sildenafil is the active ingredient in sildenafil citrate that was previously only approved in the United States and the European Union.
The use of sildenafil may cause side effects, such as headache, facial flushing, and dizziness, in some people. The use of sildenafil is not always associated with side effects.
There is some evidence that some medicines may interact with sildenafil. One of the medicines that is known to interact with sildenafil is the sildenafil. This is a phosphodiesterase type 5 (PDE5) inhibitor, which has been used by men to treat erectile dysfunction and pulmonary hypertension.
Viagra 50mg tablet contains an active component such as Sildenafil. This medication is used to treat erectile dysfunction (ED) in men. It contains the active ingredient sildenafil citrate, which belongs to a class of drugs called phosphodiesterase type 5 (PDE5) inhibitors. It increases blood flow to the penis during sexual stimulation, which helps men achieve and maintain an erection. Viagra may have side effects, including headache, flushing, dizziness, upset stomach, nasal congestion, and vision changes. It should not be taken with certain medications or conditions, so it's crucial to consult a healthcare professional before using it. Erectile dysfunction can have a profound impact on a man's self-esteem and quality of life. By addressing ED, this medication can help improve a person's sense of well-being and overall happiness.
Individuals with a history of cardiovascular diseases, such as heart problems (angina, heart failure, irregular heartbeats) or recent heart attack, should exercise caution when using Viagra. The sexual activity itself can strain the heart and can further increase the strain by increasing blood flow. Consult with a healthcare professional to assess the risks and benefits in such cases. This medication can cause a mild decrease in blood pressure. Caution is advised for individuals with low blood pressure or those taking medications that lower blood pressure, as combining these can lead to potentially harmful interactions. People with severe liver or kidney disease may experience slower elimination of Viagra from the body, leading to a prolonged effect. Dosage adjustments may be necessary in such cases.
What is Erectile Dysfunction? Erectile dysfunction, also known as impotence, is when a man is unable or does not respond to a natural sexual stimulation rate. It can be caused by adjusting the natural flow of blood to the penis, such as in calcium-enriched beverages like cisapride or metoprolol, or by experiencing emotional or psychological factors that can affect sexual performance. The main active ingredient in Erectile Dysfunction is sildenafil, but the presence of other ingredients can affect the rate of blood flow. There are two types of Viagra: open-market formulations: open-market formulations are manufactured under high brand names and open-market formulations are manufactured by generic versions. ThisIFA study involved more than 1,300 individuals with ED to determine if Erectile Dysfunction was the result of scripted medication or a combination of both. The primary measure of this study was a questionnaire administered to 704 participants aged 18 to 64 years with ED. These participants were followed for a minimum of 6 months. The researchers determined that participants who had experienced adverse events were at an increased risk of developing erectile dysfunction. Open-market Viagra products offered improved sexual performance, but they were often written in a terms that implied more natural flow.Viagra 50mg tablet contains an active ingredient called sildenafil. This medication belongs to a class of drugs called phosphodiesterase type 5 (PDE5) inhibitors. It works by increasing blood flow to the penis during sexual stimulation, thereby helping to achieve and maintain an erection. Viagra may cause a mild decrease in blood pressure. Caution is advised for individuals with low blood pressure or heart problems (angina, heart failure, irregular heartbeats), as combining these can result in potentially harmful interactions. The use of Viagra 50mg tablet requires a consultation with a healthcare professional, as it contains the active ingredient sildenafil.
Viagra 100mg tablet contains an active ingredient such as Sildenafil.
Viagra 50mg tablet contains an active ingredient such as Sildenafil.
Viagra, Sidena, and Cialis – Now Available Without Prescription at Pharmadirect.ie
Looking for trusted and effective treatments for erectile dysfunction (ED)?Pharmadirect.ie, Ireland’s leading online pharmacy, now offersViagra (Sildenafil),Sidena (Sildenafil), andCialis (Tadalafil)– all available without a prescription for safe, discreet, and hassle-free ordering. Each of these medications has unique benefits, allowing you to choose the best option that suits your lifestyle and needs.
The original and most well-known ED treatment,, is a tried-and-true solution for men experiencing difficulty achieving or maintaining an erection. Viagra starts working within30-60 minutesand can last up to4-6 hours, making it ideal for planned or spontaneous sexual activity. It works by increasing blood flow to the penis, helping you achieve a firm erection when sexually aroused.
For a cost-effective alternative to Viagra,is a great option. It contains the same active ingredient—Sildenafil Citrate—and provides the same benefits and effectiveness in treating ED. Sidena is available at a lower price point, offering an affordable solution for men seeking reliable erectile dysfunction treatment. Like Viagra, Sidena starts working inand lasts for several hours, giving you confidence and control when it matters most.
For those who prefer more flexibility,is a standout option due to itslong-lasting effects. Cialis can remain effective for up to36 hours, earning it the nickname "the weekend pill." This means you can enjoy spontaneous intimacy without the need to plan exactly when to take the pill. Cialis works by relaxing blood vessels and increasing blood flow to the penis, allowing for a natural response to sexual stimulation over an extended period.
Why Choose Pharmadirect.ie?
At, we make it easier than ever to access these proven ED treatments. Withno prescription required, you can orderSidena, oronline with just a few clicks, and enjoy discreet, fast delivery across Ireland. We are committed to offering competitive prices and top-notch customer service, ensuring you get the right product for your needs, backed by a trusted pharmacy that has been in the healthcare business at our physcial store since 1953.
Key Benefits:
Shop with confidence atfor your ED treatment solutions today. Whether you choose,, or, we have the right option to help you take control of your sexual health—delivered discreetly to your door.
ZacBiauryPharma is a pharmaceutical know what: modern pharmaceutical company with a track record of safety, effective, and service. ZacBiauryPharma is a modern pharmaceutical company with a track record of safety, effective, and service. We provide affordable ED treatments for our customers, always available at our pharmacy.Note: Other medications can affect how Sildenafil is processed in your body, potentially impacting its effectiveness. These include azole antifungals (such as itraconazole or ketoconazole), macrolide antibiotics (such as clarithromycin or erythromycin), HIV protease inhibitors (such as saquinavir), mifepristone, rifampin, and ritonavir.
Combining Sildenafil with other medications for erectile dysfunction (ED) or pulmonary hypertension, such as tadalafil or vardenafil, is harmful.
esar de publicidadLa listaste de Sildenafil, similar to your prescription, is for men only.
Most drugs within the tern que actue
Erectile dysfunction drugs
Hormones
Dopamine agonists (such as dapoxetine or mirtapamcor)
Treatments for depression
Other drugs for erectile dysfunction (ED)
Certain recreational drugs
Most drugs within the tern that actue
Diseo de esferidismo
La listaste de Sildenafil, like your prescription, is for men only.
Stade de France Pharmacy