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Viagra

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Viagra is one of the most popular drugs used to treat erectile dysfunction. Erectile dysfunction affects around one out of every ten men, but it is treatable. ED in men's health is the inability to obtain or maintain an erection long enough for sexual intercourse. Causes of ED may be either physical or psychological. It affects men of all ages but is more common to men above 50 years. There is no simple solution for erectile dysfunction. Still, Viagra can help men attain harder erections for a healthy sex life.

 

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Viagra is the original branded sildenafil tablet for erectile dysfunction, taken about an hour before sex.

  • Taken when needed, about an hour before sex
  • Works for around 4 to 5 hours
  • Reviewed by UK-registered clinicians
  • Discreet, plain packaging

What is Viagra?

What is Viagra?

Viagra, with the active ingredient sildenafil citrate, is a prescription medication used to treat erectile dysfunction (ED). It helps men achieve and maintain an erection sufficient for sexual intercourse by increasing blood flow to the penis when sexually stimulated. Viagra is widely known as one of the first and most popular treatments for erectile dysfunction and is available in 25mg, 50mg, and 100mg doses. It is usually taken as needed, about one hour before sexual activity. Viagra is a safe and effective treatment for most men with ED and is known for its reliability and quick onset of action.

How Does Viagra Work?

Viagra works by inhibiting an enzyme called phosphodiesterase type 5 (PDE5), which regulates blood flow in the penis. When sexually stimulated, this enzyme can limit the amount of blood that flows to the penis, making it difficult to achieve an erection. By blocking PDE5, sildenafil allows the blood vessels in the penis to remain dilated, increasing blood flow and making it easier to achieve and maintain an erection. The medication typically starts working within 30 to 60 minutes and its effects last for up to 4-5 hours, giving a sufficient time window for sexual activity.

How to use Viagra

Take medication with the gudiance of you healthcare provider and only after reading the instructions:

  • It is recommended that you take one Viagra tablet at least 1 hour before sex.
  • Viagra can take up to an hour to take effect in some men, although it can take effect in as little as 20 minutes in some men.
  • Viagra can produce an effect for up to 4 - 5 hours.
  • Do not take more than one tablet for erectile dysfunction within 24-hours.
  • Limit your food and alcohol intake before taking Viagra to ensure it remains effective.
Possible side effects

The main side effects of Viagra are:

  • Headache
  • Flushing (redness of the face and body)
  • Dizziness
  • Indigestion
  • Visual disturbances (blurred vision, sensitivity to light, or colour tinge)
  • Stuffy or runny nose
  • Back pain
  • Nausea

Serious but rare side effects may include sudden vision loss, hearing loss, chest pain, or a prolonged erection lasting more than 4 hours. If any of these occur, seek immediate medical attention.

Warnings and precautions

Viagra pills are not suitable for you if you suffer from these conditions:

  • Heart rhythm problems
  • You had a heart attack or stroke within the last six months
  • High or low blood pressure, liver or kidney disease
  • You are a hemophiliac
  • You suffer from sickle cell anemia or leukemia
  • You have a physical deformity of the penis
  • You suffer from retinitis pigmentosa
  • You have a stomach ulcer
What are the ingredients in Viagra?

Each Viagra tablet contains sildenafil either 25mg, 50mg or 100mg.

Each tablet also contains microcrystalline cellulose, calcium hydrogen phosphate, croscarmellose sodium, magnesium stearate, hypromellose, titanium dioxide (E171), lactose monohydrate, triacetin, indigo carmine aluminium lake (E132).

Frequently asked questions

Everything you need to know about Viagra before you start.

1. How long does Viagra take to work?

Viagra usually takes about 30 to 60 minutes to take effect, and it’s best to take it one hour before sexual activity.

2. How long does the effect of Viagra last?

The effects of Viagra can last for up to 4-5 hours, but this varies depending on individual response and dosage.

3. Can I take Viagra with food?

Yes, but it is recommended to avoid a heavy or high-fat meal before taking Viagra, as it can delay the onset of action.

4. Can Viagra be used by women?

Viagra is specifically designed for men with erectile dysfunction and is not approved for use by women.

5. Is it safe to drink alcohol while taking Viagra?

It is best to limit alcohol intake when using Viagra, as excessive alcohol can reduce its effectiveness and increase the risk of side effects.

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How it works

Throughout your treatment, the SwiftDoctor clinical team is available to support you, answer questions, and review your progress.

  • Step 1

    Complete your health questionnaire online in less than five minutes

    Takes less than five minutes. Answer a few straightforward questions about your health history, lifestyle, and goals — all from the comfort of your home, with no GP appointment needed. Add your desired medication to your basket and make payment.

  • Step 2

    A UK-registered clinician reviews your responses

    A UK-registered clinician personally evaluates your submission to ensure Mounjaro is safe and appropriate for you. Your health is never treated as a formality.

  • Step 3

    If eligible, your prescription is issued

    If you meet the clinical criteria, your prescription is approved and prepared without delay. No waiting rooms. No repeat visits. Just a clear, straightforward process.

  • Step 4

    Your medication is dispatched in discreet, temperature-controlled packaging directly to your address

    Your medication is dispatched in plain, temperature-controlled packaging — protecting both its integrity and your privacy. Straight to your address, on your schedule.

  • Dr S. Bano

    Dr Bano is a co-founder of SwiftDoctor. She is an experienced General Practitioner with a special interest in obesity management, medical education, and digital health. She qualified as a doctor from the University of Nottingham in 2011 and has since built a diverse and impactful career in both clinical and educational settings.

    Book in with me
  • Nasir Ali

    Mr Nasir Ali is a co-founder and the Superintendent Pharmacist at SwiftDoctor. He is a highly experienced Advanced Clinical Practitioner. With extensive experience in primary care, he has worked across GP surgeries and digital health clinics, bringing a deep understanding of both face-to-face and virtual models of care.

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  • Jane Eastwood

    I am a Registered Nurse with 23 years’ experience – I have worked extensively in New Zealand and in the UK and I currently work as an Advanced Clinical Practitioner in the General Practice setting and I have special interests in menopause, diabetes, general practice and the older adult.

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