• Effective for up to 4 hours
  • Works in 30-60 minutes
  • 1st treatment on the market

You can buy Viagra online just by completing a 5-minute online consultation which is then assessed by one of our partner doctors. Our discreet and confidential service enables you to order this medication without a face-to-face consultation with free next-day delivery. You can even get your order delivered to your workplace. Prices for Viagra will appear once your consultation has been approved.

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Can I buy Viagra online safely?

Yes, you can order Viagra pills here online. As a prescription-only treatment, it is essential that you first complete our free online consultation, which is then reviewed by one of our partner doctors. If approved, you can then complete your order and a prescription will be signed and provided to our pharmacy.

It is not possible to buy Viagra online or in-person without a prescription first. This is the same for all impotence medications. If you come across any websites selling Viagra without a prescription, or they don't require you to complete a consultation, it is best to avoid completely.

All our treatments are sealed and delivered in discreet packaging to you wherever you are in the UK through are free next day delivery service (or same day if in London).

Dr Hilary Jones Independent Medical Adviser

Still not sure? Take our free consultation to find the right treatment for you.

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Viagra without seeing a doctor

A doctor's approval is mandatory when obtaining Viagra, however, this doesn't mean you have to see a doctor in-person if you're looking for discretion. Confidentiality regarding sexual health is understandable and Viagra can be purchased online from our registered pharmacy with no need to physically book and attend a doctor's appointment.

What is Viagra

Viagra is the brand name of the erectile dysfunction medication sildenafil produced by the pharmaceutical developer Pfizer. It has helped millions of men who have erectile dysfunction (ED) and has been clinically proven to help them achieve an erection strong enough for penetrative sex with their partner.

Viagra, like most erectile dysfunction treatments, is of the class of medication known as PDE-5 (Phosphodiesterase type 5) inhibitors, and will only work when the user is sexually aroused. Other treatments in the same class of drugs include Cialis, Levitra, and Spedra.

What does Viagra look like?

Detail of Viagra blue pill with VGR 100 on one side Viagra can be referred to as the 'blue pill', giving you a hint to what genuine Viagra tablet should look like. The pills are a light blue colour and oval shaped. On one side of the pill should have "Pfizer" engraved and the other side has "VGR" along with the dosage. For example, "VGR 25", "VGR 50" and "VGR 100".

How does Viagra work?

An erection occurs when sexual arousal stimulates signals in the brain, which increases nitric oxide levels. This, in turn, stimulates the production of cyclic guanosine monophosphate (cGMP) in the body, which helps to relax the muscles in the penile wall, allowing the arteries in the penis to fill with more blood causing it to become erect.

Men with erectile dysfunction have an impaired cGMP function, as the PDE-5 enzyme responsible for degrading cGMP in the body is too active, preventing its correct function and limiting the flow of blood to the penis required for an erection.

Viagra simply works through its active ingredient sildenafil citrate by inhibiting this PDE-5 enzyme for a certain amount of time, allowing the cGMP chemical to work properly, allowing the arteries in the penis to be relaxed and fill with more blood creating a stronger erection when the man is sexually stimulated.

There is also a generic version of Viagra - sildenafil, is also available to order with the only difference being the brand packaging, but in all other ways, the generic Viagra works just as well.

What if Viagra doesn't work?

It is possible that the dosage you are taking is the wrong level for you. Viagra is available in 25mg, 50mg and 100mg. If you are on 25mg or 50mg, enquire with your doctor about changing dosages.

Secondly, you must be aroused for Viagra to work, it is not a continual medication.

Finally, there are certain conditions, foods, and drinks that may affect Viagra. This includes big fatty meals around the time that you take a tablet. To optimise your medication to the fullest, we have some tips under 'How to use Viagra'.

Can women use Viagra?

Some studies have reported that Viagra works for women, however, this is not conclusive and it is still sold to just men at this minute in time. At HealthExpress, this is also the case for men over the age of 18.

Research is being undertaken regarding a female Viagra to combat low libido in women.

What are the benefits?

The main benefit of Viagra (sildenafil) is the ability to help men with erectile dysfunction achieve an erection, however, there are other valuable health points to be noted:

  • Can be used by men struggling to achieve or maintain a strong enough erection
  • Can help to improve sexual confidence
  • Suitable for men with coronary artery disease (as long as no other medication that interacts adversely is also being used)

How to take Viagra

Viagra usage One Viagra tablet is taken 30-60 mins before intercourse when needed More than one tablet should not be taken within 24 hours. Should be taken preferably with a glass of water If a lower dosage does not provide the desired effect you may have to adjust it Store the Viagra pack at room temperature away from moisture

It is advised to avoid food and drinks tha tinteract with changing your blood flow. This includes milk, watermelon and grapefruit. You can find more details about safety measures and the use of this treatment in the patient leaflet or the Viagra questions and answers page.

How long does it last?

A standard pill usually lasts up to 4 hours in the system and should wear off after that period. The effects of the tablet do vary from person to person and due to the nature of erectile dysfunction treatments (such as Cialis, Levitra and Spedra), it should only be used once every 24 hours.

Effective within 30-60 minutes for the vast majority of users
Viagra clock 1
Lasts up to 4 hours
Viagra clock 2

How to make Viagra the most effective

Viagra and other impotence medications work best on an empty stomach. Fatty foods or a big meal can mean the medication takes longer to digest and take effect. It is also advised to limit drinking alcohol.

Whilst Viagra is estimated to last up to 4 hours, it can differ depending on individuals and you may find the effects wearing off within this timeframe, especially if you have done things to impair the maximum effectiveness. It's also important not to crush the tablet and just swallow whole.

If you have tried everything to make Viagra work, including the tips above and trying different dosages, with no prevail you can book an appointment with your doctor.

Viagra dosages

This erectile dysfunction treatment comes in three prescribed dosages with varying strengths 25mg, 50mg and 100mg, which are available to order here online.

Viagra 25mg

Lowest dosage - the 25mg capsules are recommended for those sensitive to higher dosages of the medication and men over the age of 65.

Viagra 50mg

Standard dosage - this is usually the regular dose recommended by the doctor to start with when first using this ED treatment. This enables the user to know whether the medication is effective or whether a dosage alteration is required.

Viagra 100mg

Maximum dosage - this is the strongest dosage available and it is only recommended for men to increase to this dose who have seen little to no change when taking the 50mg dose and have not experienced any side effects when taking the 50mg pill.

The history of Viagra initially saw it created as a treatment for high blood pressure and angina in 1989 by Pfizer Pharmaceuticals, however it wasn't very successful in initial trials and the project was to be abandoned. Fortunately those involved in the trials reported an unexpected reaction to the medicine - stronger erections after its use. Pfizer were then able to produce and approve Viagra for erectile dysfunction in 1998 with three dosages 25mg, 50mg and 100mg.

Clinical studies have proven the effectiveness of Viagra (sildenafil) in relation to the dosage used:

  • 25mg - over 72% taking the smallest dosage record a stronger, longer lasting erection
  • 50mg - over 80% of men taking this dosage record a stronger, longer lasting erection
  • 100mg - 85% of men that take 100mg dosage record a stronger, longer lasting erection

Viagra precautions/interactions

Viagra tablets are suitable for any male over the age of 18 with erectile dysfunction, and as with any medication, if you are allergic to the active ingredient sildenafil citrate then it is advised that you mention it to the doctor as you may need to seek alternative treatments. It should also not be consumed by women or children. [1] Although the treatment is suitable for use by most men, it may not be prescribed and may be unsuitable for men who:

  • Have or have had cardiovascular disease e.g. heart problems, angina or stroke
  • Have kidney or liver disease
  • Have very low blood pressure or sickle cell anaemia
  • Have galactose intolerance
  • Have or have had renal dysfunction
  • Have had a stroke in the past 6 months
  • Have severe damage to the penis or penile deformity
  • Are already on nitrate medication
  • Have Peyronie's disease

It is important that you state accurately all information regarding past and current conditions when filling out the medical consultation.

Viagra is noted to interact adversely with certain drugs, so it is essential to be aware and careful with any medication taken alongside it, some include:

Grapefruit and grapefruit juice
  • Grapefruit and grapefruit juice
  • Increases the levels of sildenafil in the body that can cause low blood pressure.
Alcohol
  • Alcohol
  • Consumption can increase the chance of side effects such as dizziness and flushing.
Blood pressure medication
  • Blood pressure medication
  • Mixture with blood pressure medication such as Lisinopril or Amlodipine can further lower blood pressure to fatal levels.
Nitrates
  • Nitrates
  • Nitrates increase the blood vessel widening capabilities of Viagra, which can lower blood pressure to a dangerous level.

It is best to also limit the consumption of fatty meals or high amounts of alcohol before using Viagra, as they may delay the absorption of the tablet into your system.

If you have used other erectile dysfunction treatments such as Cialis or Levitra it is recommended to wait at least 24 hours (36 hours for Cialis) before using Viagra.

Using Viagra and Priligy

Priligy (dapoxetine) is used in treating premature ejaculation, whereas Viagra is used in the treatment of erectile dysfunction. Both medications have an effect on blood pressure, so it is essential that moderate care is taken and to confirm with your doctor you are suitable to use both treatments as side effects may also be heightened.

Can Viagra lower blood pressure?

Viagra (Sildenafil) is a medication known as a PHE5 Inhibitor that treats erectile dysfunction by increasing blood flow to the penis. But it isn't its only use.

In 2005, Viagra's active ingredient Sildenafil was also approved by the FDA as a treatment for Pulmonary Hypertension. This is a rare and life-threatening condition due to high blood pressure in the lungs. Pfizer repackaged its key ingredient and launched its new product Revatio (Sildenafil) in the same year.

Although Viagra is not marketed and available as a specific treatment for non-pulmonary high blood pressure, it can be a side benefit of the drug. Viagra works by blocking an enzyme called PHE5 and acting as a vasodilator - allowing the blood vessels dilate and more blood flow to the penile tissue. This process has the secondary effect of making it easier for the heart to pump blood throughout the body and lowering your blood pressure.

A study that monitored the blood pressure of patients after taking Viagra (Sildenafil) showed systolic blood pressure drops of 8 to 10 mg Hg and diastolic drops of 5 to 6 mm Hg. The effects peaked after an hour and dropped back after four hours.

Can Viagra lower my blood pressure too much?

Viagra naturally lowers your blood pressure, you should be cautious taking it with other medications. Viagra is safe to take in conjunction with many heart medications, but the FDA recommends specifically avoiding taking it with alpha-blockers or medications containing nitrates.

If mixed with these, your blood pressure could drop too low, and you could become dangerously hypotensive. You should always tell your consultant or doctor of any other medications you are taking, before starting Viagra.

When completing a consultation to buy Viagra, it is important to list any high blood pressure medication including Losartan, Lisinopril, Bendroflumethiazide and Amlodipine.

Viagra side effects

Side effects can occur with most prescription medications, and whilst they are not too common with this treatment, you are most likely to experience the following if you are sensitive to the active sildenafil citrate ingredient or PDE-5 inhibitors in general:[2]

Potential
Flushing of the face and neck Headache Dizziness Stuffy nose
Muscle pain Back pain Upset stomach Nausea

These usually subside as your body becomes accustomed to the dose, however, if they tend to persist, seek further advice from your GP.

Uncommon

Whilst uncommon, occasionally these side effects can occur. If they don't pass over time, it's important to seek your doctor's advice:

Uncommon
Insomnia High fever Diarrhoea
Rash or redness Urinary tract infection Joint pain

Rare

You should seek immediate medical help if you experience any of the following symptoms:

Rare
Chest or shoulder pain or pressure Pain in your jaw Sweating Blurry vision or loss of vision Priapism
Infection of the sinuses Any changes in blood pressure Heart palpitations Severe depression or anxious feelings Anaemia

Alcohol (ethanol) can increase the risk of side effects if consumed with Viagra. Sweating, headaches, dizziness and heart palpitations may be experienced, therefore it is suggested to avoid drinking alcohol before or after taking impotence treatment.

Viagra is not a recreational drug, therefore if you do experience any adverse effects as a result of using this treatment, then it is advised that you see your doctor or healthcare specialist as soon as you can.

An allergic reaction to any medication requires emergency medical help. If you do experience any facial swelling or difficulty breathing, then stop taking the medication immediately and seek medical help as soon as you can.

If you need any further information regarding the side effects of Viagra, health benefits or precautions, please feel free to contact us, visit your local health adviser or read more in the attached patient information leaflet.

Will I experience side effects?

Whilst we have listed a few side effects including those classed as "common", it doesn't mean they are likely to happen. In fact, even common side effects have a low probability. It's also worth mentioning that many side effects are so light in nature that they aren't noticed or highly manageable. A higher dosage can mean an increase chance as well.

Why Choose HealthExpress?

  • Fast, free delivery - order before 4:30pm and receive your treatment the next day (same day for London postcodes)
  • Free online consultation service with one of our partner doctors
  • Discreet packaging - we don't include any branding or pharmacy logo on our packaging meaning you can get your treatment delivered anywhere
  • Only proven and high quality prescription medication is available and approved by the National Pharmacy Association.
  • All inclusive confidential service
Dr Hilary Jones Independent Medical Adviser

Still not sure? Take our free consultation to find the right treatment for you.

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Further Information Download Viagra Patient Leaflet
Sources