Viagra is a tablet treatment used to help tackle erectile dysfunction in men.

Is it effective? Can Viagra cure ED?

In many cases, Viagra is very successful.

74 percent of men in clinical trials using the 50mg starting dose achieved an erection sufficiently potent for sexual intercourse.  

The 25mg dose was effective amongst 63 percent of patients; while the higher, 100mg dose had an 83 percent success rate.  

While Viagra does not constitute a ‘cure’ for ED, it has been shown to be a reliable treatment for symptoms of impotence.   

Is it safe to purchase Viagra online?

If you buy Viagra from a registered online pharmacy, it’s perfectly safe to purchase. 

In order to establish that the medication is a legitimate product, check that the website contains the General Pharmaceutical Council (GPhC) registration logo. This is the verification required for online pharmacies to sell medicines. 

You’ll need to have a consultation with a UK pharmacy prescriber or doctor before you can be issued the treatment, be it in person or online. For your safety, you should make them aware of any medical conditions or allergies you have, or any other medications you’re currently using.

What doses are there on the market?

Viagra is available in 25mg, 50mg or 100mg doses. Viagra Connect is a pharmacy treatment, and is a rebranded form of the 50mg dose. 

Do I need a prescription to buy Viagra?

The lower (25mg) doses and higher (100mg) doses require a prescription, but the middle (50mg or Viagra Connect) dose can be purchased following a consultation with a pharmacist, without a prescription. 

In either case, in the UK, you will need to be assessed by a doctor or a pharmacist first to assess if Viagra is an appropriate treatment for you.

What is Viagra Connect?

Viagra Connect is the only ED medication that can be obtained without a prescription (as of Spring 2018). It contains the same active ingredient as Viagra and is the same strength as the 50mg dose. 

It is unsuitable for men with cardiovascular complications, liver or kidney failure or for people who are taking certain medications, such as nitrates for angina..

What does Viagra contain?

Viagra consists of the active ingredient sildenafil citrate. It also contains the following: microcrystalline cellulose, croscarmellose sodium, calcium hydrogen phosphate (anhydrous), magnesium stearate, hypromellose, titanium dioxide (E171), lactose monohydrate, triacetin, indigo carmine aluminium lake (E132).

How much does Viagra cost?

It varies, but prices typically start at £9 per tablet for the 50mg dose if you buy it in packets of 4. The cost can also depend on the dose and quantity you’re looking to purchase. Lower doses are often cheaper than higher ones, and certain pharmacies may charge less per tablet for bigger packs (8, 16, 24 or 32 tablets).

How long does it take to kick in?

Viagra tends to kick in within 30-60 minutes. You must be stimulated sexually for the drug to work.

Levitra and Cialis have a similar reaction time. Spedra is thought to be a little quicker, and estimated to work from 15-30 minutes.   

Once I’ve taken it, how long will it be effective for?

The drug typically remains active in the body for up to four hours, with its potency fading thereafter. Response times have been shown to differ, however. 

How many tablets should I take?

One pill in any 24 hour period. You should only use the treatment when you’re looking to engage in sexual activity. 

Do you take it every day?

Yes, but only once per day. If you’re looking to have sex more often than twice a week, an alternative medication, such as tadalafil, may be more suitable.

Is Viagra effective for women?

There is no female Viagra equivalent available for women, contrary to some media reports.

Is Viagra better than Cialis?

There are advantages to both products, and one may be more suitable for you than the other due to the length of time they last for, or how often you can take them.

For example, there’s a version of Cialis you can take on demand that remains active for up to 36 hours, and another version you can take every day.

You should have a discussion with your doctor about which treatment to opt for. 

Does Viagra have any side effects?

Users may experience side effects, but not in all cases. Should you have an allergic reaction, or develop an erection that persists for longer than four hours (priapism) seek medical attention. 

For more information about side effects, read the patient information enclosed prior to use. 

How safe is Viagra to use?

Yes. Viagra has undergone thorough safety tests. Your doctor or a pharmacist will assess your suitability for the treatment.

Can Viagra treat any other conditions?

While Viagra isn’t licensed to treat other conditions currently, there is a drug called Revatio which is authorised to treat pulmonary arterial hypertension. It consists of the same active ingredient as Viagra. 

Will Viagra interact with any other medications I’m taking?

Viagra may interact with other treatments you might be using, especially medicines which are used to help with cardiac conditions. You should ensure that you clarify your medical history with your doctor, in order for them to establish any potentially dangerous interactions. 

What are the consequences of taking too much Viagra?

Taking an excessive amount of Viagra may result in harmful adverse effects, which can vary from person to person, and you should seek medical attention immediately. Only consume the quantity of Viagra prescribed to you. 

Can I drink grapefruit juice whilst using Viagra?

Drinking grapefruit juice whilst using Viagra is not recommended. The juice contains a chemical which can change the amount of sildenafil getting into the bloodstream. This may enhance the risks of side effects. 

Should I choose Kamagra instead of Viagra?

No. Kamagra is a form of Viagra produced in India which is not authorised nor legal for sale in the UK. Although it may seem appealing given its cheaper price tag, there’s a much higher possibility that it’s counterfeit.  

Subsequently, the treatment may be unsafe, or comprise of ingredients not explicitly stated by the seller. 

What’s the generic version of Viagra?

Generic Viagra is the non-branded form of the same drug, Sildenafil. It has the same functionality as the branded version and is made up of the same active ingredient, although it may not be manufactured by Pfizer. 

Because it’s non-branded Viagra, it’s typically cheaper to buy, but it could look slightly different to the branded form. 

For more information about Sildenafil, see product information. 

Is herbal Viagra a legitimate treatment?

Products that claim to be natural alternatives to Viagra should be approached with some caution, as most of them haven’t been subjected to rigorous testing. This means that data on their effectiveness and safety status is limited. 

If you want to explore the possibility of trying a herbal treatment, speak to your doctor first. Non-prescription medications can also interact with other drugs, so it’s important that you’re assessed. 

What should I do if the Viagra dosage I’m given doesn’t work?

In the event that Viagra doesn’t allow you to get and sustain an erection strong enough for sexual intercourse, consult your doctor. They may change the dose or explore alternative treatments with you. There are a number of different types of ED treatment which may be more effective for you. 

Are there any reviews of Viagra online?

There are, but you should be aware that not all the information on sites and forums is necessarily correct. Some sites may scrutinise people creating multiple reviews under multiple names more closely than others, for example. 

Sites which utilise clinical staff to assess reviews should also be more reliable, as any misleading information can be removed. 

Clinical trials may provide a more accurate picture, given that they are conducted in a controlled environment and request that all participants provide a response. Nonetheless, although the statistical input can be of better quality, they may consist of medical terminology that’s not very accessible for a lay person.  

User reviews can be beneficial in terms of supplying background information about a treatment, and clinical trials details about a drug’s effectiveness, but the best port of call for context about Viagra is your doctor. A doctor can account for your medical history, and consider your health in general, before determining which medication is most suitable for you.  

You can find further information concerning reviews, results and other FAQs about ED treatments here.

Page last reviewed:  24/07/2020