Sildenafil Citrate

Viagra is an erectile dysfunction pill made by Pfizer. It works by facilitating blood flow to the penis.

To buy Viagra online, take our quick questionnaire. The answers you give will be reviewed by one of our UK qualified GPs, and you’ll receive your order within one working day of approval.

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Viagra is an erectile dysfunction pill made by Pfizer. It works by facilitating blood flow to the penis.

To buy Viagra online, take our quick questionnaire. The answers you give will be reviewed by one of our UK qualified GPs, and you’ll receive your order within one working day of approval.

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Description

What is Viagra (sildenafil)?

Viagra is a prescription tablet used to treat male impotence. It works by easing tension in blood vessels and increasing blood flow to the penis. This helps the user to achieve and maintain an erection suitable for sexual intercourse.

According to Pfizer, more than 23 million prescriptions have been issued for the Viagra since it was launched in 1998.

How erectile dysfunction affects men

Erectile dysfunction can be an intermittent or persistent problem for men. Because it typically happens where there is a lack of proper blood flow to the penis, it tends to be more common in men over a certain age. According to the NHS, erectile dysfunction is thought to occur in nearly half of all males who are 40 or over.

However it often affects men in their 20s and 30s too. It is during this age where men might be more likely to experience feelings of anxiety regarding sex. The pressure of a sexual situation can bring about the condition temporarily; whereas stress related to other areas of a person’s life can also prove to be distracting and impact upon their sexual performance.

How Viagra tablets work

Viagra tablets contain an active ingredient called sildenafil. In medical terms, sildenafil is known as a PDE5 inhibitor. 

Sildenafil works by relaxing muscle walls inside blood vessels at the entrance to the penis, to allow freer movement and increased blood flow to that area. This then makes it easier for the user to get an erection. It works only when the user is sexually aroused, and can remain functional for up to four hours after taking it.

It should be noted however that sildenafil is not an aphrodisiac, and it is not suitable for use by men who do not have erectile dysfunction.

Choosing the right dose

There are three doses of Viagra available: 25mg, 50mg and 100mg.

Viagra sildenafil 50mg: ultimately a prescriber will decide which is the most appropriate dose for a patient to use. However, men with erectile dysfunction who are otherwise healthy will typically start on 50mg.

Viagra sildenafil 25mg: in cases where the starting dose has produced favourable results, but also caused mild side effects, a doctor may choose to lower the dose to 25mg.

Viagra sildenafil 100mg: where the 50mg dose produces a response which is not strong enough, a doctor may choose to increase a patient’s dose to 100mg.

According to the product characteristics published by the European Medicines Agency, the user should not take more than one tablet in any 24 hour period.

Effectiveness of Sildenafil

In clinical trials, the 50mg dose of sildenafil produced an erection strong enough for successful intercourse in 74 percent of tested cases. For the 25mg dose, sildenafil was successful in 63 percent of cases; while the 100mg dose was successful in 82 percent of cases.

Once taken, sildenafil remains active in the body for up to five hours.

Generic Viagra

There is a generic tablet version of Viagra available. This is marketed as Sildenafil, uses the same active ingredient and works in the same way as the original, but isn’t always made by Pfizer.

In 2013, when the European patent expired on Viagra, it became legal for other firms to produce sildenafil as a generic medicine. However, sildenafil tablets are required to be made under the same conditions and are subject to the same clinical tests as Viagra.

Not all medicines have generic versions, but some websites still claim to sell them, so it’s important to know the facts and use a registered UK pharmacy.

Do I need a prescription?

It is necessary to obtain a prescription when buying Viagra online, just as it is in person. This is so that a physician can assess a patient’s suitability for the treatment prior to issue.

Our simple questionnaire takes just a few minutes to fill out. If after considering your answers our GP is satisfied that the medicine is suitable for you, an e-prescription will be issued and your medication will be dispensed by our UK pharmacy. Orders are shipped by 24-hour courier, and typically arrive within one working day.

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Page last reviewed:  Friday, Sep 29 2017
Directions

Directions

For Viagra tablets to work at their best, you should ensure you follow the instructions provided with the medicine, as well as those issued by your doctor. Doing so will help to maximise its efficiency and decrease the likelihood of side effects.

  1. Do not take Viagra more than once a day
  2. If you are taking it after a big meal it may take longer to produce noticeable results
  3. The user needs to be sexually stimulated in order for Viagra to work
  4. Never exceed your prescribed dose
  5. Before use, always read the patient information leaflet supplied with the medicine
  6. Take a look at our dosage information for more about buying Viagra 25mg, 50mg and 100mg tablets.

Download Viagra Patient Information Leaflet.

How long does it take to work?

Sildenafil usually takes around 30-60 minutes to function. Ideally, the tablet should be taken one hour before sexual intercourse to ensure the active ingredient has had sufficient time to be absorbed into the bloodstream.

How long do the effects last?

After taking the tablet, sildenafil stays active in the body for up to five hours. However, this can vary from person to person.

Page last reviewed:  Friday, Sep 29 2017
Side effects & Warnings

Side effects

No medication is suitable for absolutely everyone. While most men may find Viagra an entirely safe treatment to use, it can cause side effects in some cases. If these occur, you must speak to your GP or pharmacist right away.

Here is a list of known possible side effects associated with Viagra (sildenafil):

Common (1 in 10 people):

  • Headache

Uncommon (1 in 100 people):

  • Dizziness
  • visual colour distortions
  • blurred vision
  • flushing
  • hot flushes
  • nasal congestion
  • nausea
  • indigestion

Rare (1 in 1000 people):

  • Vomiting 
  • skin rash
  • eye irritation
  • bloodshot or red eyes
  • eye pain
  • visual flashes
  • visual brightness
  • increased sensitivity to light 
  • watery eyes 
  • increased heart rate

For more detailed information regarding potential side effects, read the patient information leaflet supplied with the product, or speak to your doctor or pharmacist.

Taking it with other medicines & contraindications

It is imperative to tell your prescriber about any medicines you are taking during consultation. You should never begin or finish taking any medicines before checking with your doctor first, whether they are prescription or non-prescription medicines, or over-the-counter remedies.

Inform your doctor during consultation for Viagra if you take: nitrates for angina (chest pain), nitric oxide donors (‘poppers’), protease inhibitors to treat HIV, antiarrhythmia medication, or alpha-blockers for high blood pressure or prostate enlargement.

You should never take Viagra in addition to any other forms of erectile dysfunction medication.

Conditions to look out for

Viagra is not suitable for those who: have severe heart or liver problems; have recently had a stroke or heart attack; have inherited eye diseases (retinitis pigmentosa); or have ever experienced a loss of vision due to non-arteritic anterior ischaemic optic neuropathy (NAION).

During consultation, please tell your GP if you have, or have had, any of the following conditions: sickle cell anaemia, leukaemia, multiple myeloma, deformity of the penis, Peyronie’s Disease, heart problems, bleeding issues or stomach ulcers.

Pregnancy and breastfeeding

This treatment should not be used by women.

Driving and using machinery

Possible side effects of Viagra include dizziness and visual disturbances. You should wait and see how this treatment affects you before attempting to drive or operate machines.

Food, drink and alcohol

It may take longer for Viagra to work if taken with a large meal.

Alcohol can make erectile problems worse, so it is better not to drink alcohol when using this medicine.

Lactose intolerance

These tablets contain lactose. If you are intolerant to any sugars, let your prescriber know.

Page last reviewed:  Friday, Sep 29 2017
Please read the patient information leaflet for this medicine fully before use:

Viagra 25mg

Viagra 50mg

Viagra 100mg

Q&A

What is the difference between Viagra and Sildenafil?

In clinical terms, they are the same drug. Both contain the same active ingredient in the same dosage amounts, and should in theory produce the same results.

The main difference is that Sildenafil is a generic version of Viagra, which means that it will not always be made by Pfizer. The appearance of the tablet may be different, and the packaging it comes in will not be the same.

What are the alternatives to Viagra?

There are other tablets available for erectile dysfunction, such as Cialis, Levitra and Spedra. ED medicines are also available in non-tablet form, such as Caverject, MUSE, Nipatra and Vitaros. All of the above are prescription-only treatments, meaning that you will need to have your condition assessed by a physician before using them to ensure they are safe for you.

‘Natural’ or ‘herbal’ remedies are also offered by some outlets as over-the-counter treatments for erectile dysfunction. However, they are not subject to the same testing procedures as prescription medicines, and are therefore not scientifically proven to be effective (or even safe).

Can women take Viagra?

No, it is only suitable for men. At present, there is no licensed medication on the market which resembles Viagra for women.

Can I still drink alcohol?

Yes, but it is not advisable. Alcohol can be a contributing cause of erectile dysfunction and it may work to limit the effect of the treatment.

Will I still be able to drive?

If you experience no side effects, yes. However, in some cases, Viagra can cause dizziness and altered vision, so if you experience these or any other side effects it’s important not to drive or operate heavy machinery. You should immediately see your doctor or pharmacist if you notice anything unusual.

How should I store it?

Do not store these tablets above 30°C, and keep them in a safe place away from children.

Am I allergic to anything in the medicine?

Viagra tablets contain the active ingredient Sildenafil Citrate. Do not take the medicine if you are allergic to this, or any other ingredients contained in the medicine: microcrystalline cellulose, calcium hydrogen phosphate (anhydrous), croscarmellose sodium, magnesium stearate, hypromellose, titanium dioxide (E171), lactose monohydrate, triacetin, indigo carmine aluminium lake (E132).

Is it available over-the-counter?

No. Viagra is only available with a prescription, and cannot be sold legally without prior consultation with a healthcare professional.

Is it right for me?

If you are seeking treatment for erectile dysfunction and want to find out if Viagra can work for you, take our questionnaire. Once your answers have been screened, our practitioner will be able to make a decision as to whether or not the treatment is safe for you. Once approved, your order will be passed onto our dispensing pharmacy, who will dispatch your order in secure packaging via 24 hour courier.

Page last reviewed:  Friday, Sep 29 2017
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