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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.

Dosage and Administration

Sildenafil is available in 25mg, 50mg, and 100mg strengths.

  • The usual starting dose is 50mg, taken approximately one hour before sexual activity.
  • Dosage can be adjusted depending on individual response and tolerability.
  • Take only one tablet in 24 hours, with or without food.
  • Avoid grapefruit juice, as it can increase the risk of side effects.
  • A high-fat meal may delay onset of action.

Effectiveness

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.

Side Effects

Common side effects include:

  • Headache
  • Flushing
  • Nasal congestion
  • Indigestion

Less common but serious effects include visual disturbances, hearing changes, or prolonged erections. Seek medical attention if severe or persistent side effects occur.

Contraindications

Sildenafil should not be used by those:

  • Taking nitrates for chest pain
  • With severe heart or liver conditions
  • Under 18 years of age
  • With certain medication interactions (e.g. alpha-blockers, antifungals, antibiotics)

Interactions

Inform your doctor of all medications and supplements before use. Interactions may occur with:

  • Nitrates
  • Alpha-blockers
  • Some antibiotics and antifungal medicines

Alcohol and Heart Conditions

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.

Availability and Cost

Sildenafil is available by prescription only in the UK.

  • Generic versions are more affordable than branded Viagra.
  • Supplied by licensed UK pharmacies such as Online Chemist.
  • Avoid counterfeit products from unregulated websites.

Take Control of Your Sex Life

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.

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  • PRODUCT NAME: Sildenafil Citrate
  • DIRECTIONS: Use Sildenafil for oral use only. It is not recommended to take it on a Friday.
  • Inform your doctor about any prescription and non-prescription drugs, as Sildenafil may not be suitable for you...

Abstract

Background

Sexual dysfunction is a common complaint of sexually transmitted infections (STIs) in men, often affecting men in their early 20s and 50s. A recent systematic review and meta-analysis examined the effectiveness of various sexual dysfunction medications. The review found that the evidence of effectiveness for sexual dysfunction medications varies widely and there is a lack of evidence to suggest their use. This study aimed to assess the effectiveness of Viagra (sildenafil) for the treatment of sexual dysfunction in men.

Methods

This was a cross-sectional review of the literature and an economic analysis, conducted using the Medical Dictionary for Regulatory Activities (MedDRA) for English language articles. The database was reviewed to identify eligible studies. The review included articles that investigated the efficacy of sexual dysfunction medications in men who are or might be sexually active.

Sildenafil was compared with Viagra to assess whether it is effective and safe for treatment of sexual dysfunction in men who have a past history of erectile dysfunction, including pulmonary hypertension, pulmonary arterial hypertension, aortic stenosis, benign prostatic hypertrophy (BPH), and heart failure. The results showed that Viagra was efficacious and safe for the treatment of sexual dysfunction in men who have a past history of erectile dysfunction. However, this finding was not confirmed by a single study.

Sildenafil was compared with sildenafil and tadalafil, but the two medications showed differences in efficacy. Sildenafil was effective in 70% of the trials, whereas tadalafil was efficacious in only 7% of trials.

Sildenafil and Viagra were efficacious in 70% of the studies, but a small number of studies reported that they were associated with serious side effects, such as priapism, sudden death, and erectile dysfunction, or adverse events. The results of these studies did not show any differences between sildenafil and Viagra.

Conclusions

In conclusion, sildenafil is effective and safe in the treatment of sexual dysfunction in men who have a past history of erectile dysfunction. The findings of this study suggest that the use of sildenafil is an appropriate treatment for erectile dysfunction, but the results were not confirmed by a single study.

Citation:Chen H, Lian B, Li Y, Li L, Zhang X, et al. (2020) Effectiveness of Sexual Dysfunction Medication in Men Who Have Erectile Dysfunction (ED) with Norvasc, Viagra, and Sildenafil. PLoS ONE 7(10): e0164117. https://doi.org/10.1371/journal.pone.0164117

Editor:Chen H. Li, U. P. O., Fudan University, China

Received:February 8, 2021;Accepted:September 11, 2021;Published:November 26, 2021

Copyright:© 2021 Chen et al. This is an open access article distributed under the terms of the, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Data Availability:The data associated with this article are available from the corresponding author in the corresponding author'sebrahidrato.com.

Funding:The authors received no specific funding for this work.

Competing interests:The authors have declared that no competing interests exist.

Introduction

The global burden of sexual problems, such as impotence, is growing rapidly. As of 2021, the total number of STIs is expected to increase by 10% annually, resulting in a substantial burden of sexual dysfunction (SD) in men. A recent systematic review and meta-analysis demonstrated that, as a result of sexual dysfunction, the prevalence of SD was increasing.

Sexual dysfunction is defined as the inability to achieve and maintain an erection sufficient for sexual intercourse. It is important to understand the extent to which ED affects sexual desire, self-image, and emotional self-image. In addition, it is common to have problems with arousal, orgasm, and ejaculation. In a healthy individual, a satisfactory sexual experience is often associated with a lack of desire to engage in sexual activity.

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How does viagra work?

Sildenafil belongs to a group of medicines called phosphodiesterase type 5 (PDE5) inhibitors. It works by relaxing the blood vessels in the penis, allowing increased blood flow during sexual arousal.

The drug is available in tablets of 20 mg, 30 mg, 50 mg, 60 mg, and 70 mg. The tablets are taken before sexual intercourse and should be swallowed whole with water.

The drug is taken by mouth only, as it can affect the body.

It is not recommended for women or children. Men should not take this drug.

If you have any questions about this medication, ask your doctor or pharmacist.

How long does viagra last?

Sildenafil remains in the body for about a week after it has been taken, even though it is usually taken on an as-needed basis.

After that time, the drug starts working again. The effects are usually noticeable within 30 minutes to an hour.

Sildenafil will remain in your body for about 3 to 4 hours. However, some people may find that it takes longer for it to work for them. Some people may not have the desired effect.

Sildenafil can be absorbed through the skin and be absorbed more quickly into the bloodstream.

This means that a dose of sildenafil will be needed. However, this does not mean that a dose of sildenafil will be required.

Sildenafil is available as a generic medicine. It comes as a capsule, tablet, and nasal spray.

What are the side effects of viagra?

Sildenafil has no known side effects. However, some people may experience side effects.

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.

Dosage and Administration

Sildenafil is available in 25mg, 50mg, and 100mg strengths.

  • The usual starting dose is 50mg, taken approximately one hour before sexual activity.
  • Dosage can be adjusted depending on individual response and tolerability.
  • Take only one tablet in 24 hours, with or without food.
  • Avoid grapefruit juice, as it can increase the risk of side effects.
  • A high-fat meal may delay onset of action.

Effectiveness

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.

Side Effects

Common side effects include:

  • Headache
  • Flushing
  • Nasal congestion
  • Indigestion

Less common but serious effects include visual disturbances, hearing changes, or prolonged erections. Seek medical attention if severe or persistent side effects occur.

Contraindications

Sildenafil should not be used by those:

  • Taking nitrates for chest pain
  • With severe heart or liver conditions
  • Under 18 years of age
  • With certain medication interactions (e.g. alpha-blockers, antifungals, antibiotics)

Interactions

Inform your doctor of all medications and supplements before use. Interactions may occur with:

  • Nitrates
  • Alpha-blockers
  • Some antibiotics and antifungal medicines

Alcohol and Heart Conditions

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.

Availability and Cost

Sildenafil is available by prescription only in the UK.

  • Generic versions are more affordable than branded Viagra.
  • Supplied by licensed UK pharmacies such as Online Chemist.
  • Avoid counterfeit products from unregulated websites.

Take Control of Your Sex Life

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.

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The first of a two-part series detailing the latest prices of the erectile dysfunction drug Viagra in Ireland.

The first of a two part series detailing the latest prices of the erectile dysfunction drug Viagra in Ireland

The drug was originally developed to treat erectile dysfunction, but is now marketed as being used for other purposes. It can help men with low blood flow, but its price in the U. S. is higher than in most European countries. The drug can also help men with low blood pressure, and can help them with sexual activity at any time. It can help men with erectile dysfunction and benign prostatic hyperplasia (BPH), but it's not available over the counter.

The second of a two part series detailing the latest prices of the erectile dysfunction drug Viagra in Ireland

This is a series of interviews with men looking to lower their drug prices, including people with low blood pressure, high cholesterol, diabetes, and other health issues.