Sildenafil Citrate

Viagra is an erectile dysfunction pill made by Pfizer. When a man takes it, it helps him to get and maintain an erection strong enough for sex.

To buy Viagra online, take our questionnaire. The answers you give will be reviewed by one of our qualified UK clinicians, 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. When a man takes it, it helps him to get and maintain an erection strong enough for sex.

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

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Product information

Viagra is a tablet for erectile dysfunction. It is a blue diamond shaped pill made by Pfizer, and is available in three doses: 25mg, 50mg and 100mg. You take the pill ‘on demand’, or as and when required. It’s usually best to take it about half an hour to an hour before you plan on having sex. It keeps active in the body for up to five hours.

Who gets erectile dysfunction?

Erectile dysfunction is a condition most people tend to associate with older men. But while it can be exacerbated by health issues that are more common with age, it’s a condition that often affects younger men too. As well as physical factors like hypertension, diabetes and obesity, ED can in many cases be caused by psychological factors too. 

Nervousness or ‘performance anxiety’ in a new relationship is a common reason for erectile dysfunction, as well as stress, or emotional issues. Lifestyle habits can have an impact on it too; men who drink too much alcohol, smoke, take recreational drugs, don’t exercise or follow a poor diet can be more predisposed to ED.

What does Viagra do?

Sildenafil is the active ingredient in Viagra. In short, it helps men get stronger and better lasting erections by enabling blood flow to the penis. 

Erections happen when men become aroused due to a chemical reaction in the body. This causes blood vessels near the genitals to dilate, so that blood can fill the smooth muscle (corpus cavernosum) in the penis; making it hard. 

In ED, these vessels remain tight, and don’t let enough blood through, making it more difficult to get and stay hard. The name of the enzyme that causes these vessels to become restricted is PDE5. 

Sildenafil is a PDE5 inhibitor. This prevents the PDE5 enzyme from acting on these vessels, allowing them to open up and let blood flow in and out of the penis, making for better erections.

What dose should I use?

You’ll normally start on 50mg, which is also available as Viagra Connect. If this dose doesn’t work, a doctor or pharmacy prescriber might put you up to 100mg. If you take the 50mg but get mild side effects, like an upset stomach or facial flushing, you might be advised to take the 25mg. In general, it’s best to take the lowest dose you know is effective.

Is there a generic version?

Yes. Sildenafil is the name of the non-branded version of Viagra. It will look different and will come in different packaging, but is ‘bioequivalent’ (meaning that in clinical terms, it should be just as effective as the original).

You should always be careful when ordering Viagra, as it is particularly prone to counterfeiting. Make sure you only ever get treatment from a registered pharmacy, and that your case is reviewed by a pharmacist or doctor before you buy it.

How effective is Viagra?

The majority of users should find it works the first or second time. It can take longer to have an effect if you take it after a big meal.

In clinical trials, 74 percent of men using the 50mg achieved an erection strong enough for successful sexual intercourse; compared with 63 percent using the 25mg dose and 82 percent using the 100mg dose.

Can I get Viagra online?

Yes. Take our erectile dysfunction questionnaire to have one of our clinicians review your case. If the treatment is suitable for you, they’ll draw up a prescription enabling you to buy Viagra online from our UK pharmacy. Orders are shipped by tracked 24-hour courier, and in most cases you’ll receive yours in one business day.

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Page last reviewed:  16/09/2019
Directions

Directions

Follow the instructions provided in the leaflet, as well as those issued by your prescriber.

  • Do not take it more than once a day
  • If you are taking it after a big meal it may take longer to produce noticeable results
  • The user needs to be sexually stimulated in order for it to have an effect
  • Never exceed your prescribed dose
  • Take a look at our dosage pages for more about buying Viagra 25mg, 50mg and 100mg tablets.
  • Do not take recreational drugs if you are using Viagra, as doing so can be very dangerous.

How long does it take to work?

Usually around 30-60 minutes. Ideally, you should take it one hour before sex so that the drug has had enough time to be absorbed into the your system.

How long do the effects last?

Sildenafil stays active in the body for up to five hours. However, this can vary from person to person.

Can I split the tablets?

It's recommended that you don't, as this alters the amount of the drug you take and it’s hard to be precise. The dosage issued to you by a doctor or a pharmacist is the specific dose they feel is most suitable for you. 

Page last reviewed:  16/09/2019
Please read the patient information leaflet for this medicine fully before use:

Viagra 25mg

Viagra 50mg

Viagra 100mg

Viagra 50mg

Side effects & Warnings

Side effects

Side effects

While not everyone will experience them, Viagra can cause side effects in some cases.

If you notice: any signs of an allergic reaction, like swelling of the face, lips, eyes or throat, difficulty breathing or hives; chest pain or an irregular heartbeat; or any problems with vision; seek medical attention immediately.

Very Common (1 in 10 users):

  • Headache

Common (1 in 100 users):

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

Uncommon (1 in 1000 users):

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

For more details on side effects, read the leaflet supplied or ask your doctor or pharmacist for help.

Prolonged or painful erections

A priapism is an erection that lasts for longer than 4 hours. It is reported in the patient information leaflet as a rare side effect (affecting 1 in 1,000 users or less). If you experience this, seek immediate medical attention.

Warnings

Read more about who shouldn't use Viagra.

Using it with other medicines & contraindications

Tell your prescriber about any medicines you currently take during consultation. You should never begin or finish taking anything else before checking with your doctor first, whether they are prescription or non-prescription medications, or over-the-counter remedies.

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

You should never take more than one erectile dysfunction medicine at a time.

Conditions to look out for

Viagra is not suitable if you: 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).

Your prescriber needs to know about any medical conditions you have, including the following: sickle cell anaemia, leukaemia, multiple myeloma, penile deformity, Peyronie’s Disease, heart disease, bleeding issues or stomach ulcers.

Pregnancy and breastfeeding

This treatment should not be used by women.

Driving and using machinery

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

Food, drink and alcohol

It may take longer for Viagra to function if taken with a large meal. Don’t drink grapefruit juice at the same time as taking it, as it can increase the risk of side effects.

Alcohol can make erectile problems worse, so it is better not to drink too much of it when using Viagra.

Recreational drugs

Using recreational drugs alongside erectile dysfunction treatment can be incredibly dangerous, and cause severe adverse reactions. You must not take recreational drugs if you are taking Viagra.

Lactose intolerance

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

Page last reviewed:  16/09/2019
Please read the patient information leaflet for this medicine fully before use:

Viagra 25mg

Viagra 50mg

Viagra 100mg

Viagra 50mg

Q&A

What if it doesn’t work?

Ask your doctor or pharmacist for help if you take Viagra and it isn’t as effective as you would like it to be. They may be able to adjust the dose or, if necessary, suggest a different treatment. Some find that other similar medicines, like Cialis, Levitra or Spedra, work better for them.

If oral tablets don’t do the job, there are other types of treatment like injections (Caverject, Invicorp, Viridal) and creams (Vitaros). 

Can I drink alcohol when taking it?

In small amounts, alcohol shouldn’t make too much of a difference to how well Viagra works. But drinking excessive amounts can make erectile dysfunction worse, so should be avoided.

What if my partner is pregnant?

There is no information in the leaflet specifically about the effects of the medication on fertility, or use if your partner is pregnant or breastfeeding.

Generally, if you are taking prescription treatment and your partner is pregnant, it’s safer to use a condom during sex in any case to prevent any traces of any medications coming into contact with an unborn baby.

Can I get Viagra without a prescription?

The 50mg dose was recently repackaged as Viagra Connect, and this version does not require a prescription. It can be issued to a patient by a pharmacist, but they’ll still need to ask you some questions and do some checks to make sure it’s a safe treatment for you.

The 25mg and 100mg doses still require a prescription.

Am I allergic to anything in Viagra?

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

How should I store it?

Below 30°C, and in a safe place away from children.

How does buying Viagra online work?

Take our erectile dysfunction questionnaire, and one of our practising clinicians will review your repsonses. If treatment is suitable for you, you’ll be given the option to buy Viagra from our UK pharmacy service. They’ll dispense your medication and pass this onto our courier partners, who’ll ship your order to you by special delivery in secure packaging.

Page last reviewed:  16/09/2019

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We promise to keep your details secure and private. We will never sell your information or share it with third parties. Whatever treatment you buy online from us, we will send in plain, unmarked packaging via our secure courier service.

Delivery on all items is included in the price. After your order has been dispatched, you’ll be supplied with a tracking number, allowing you to follow the progress of your items every step of the way. We deliver to anywhere in the UK, so whether you’re in London, Birmingham, Manchester, Glasgow or Cardiff, your order will be at your door within just 24 hours of approval from our doctor.

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