Sildenafil

Buy Sildenafil Tablets Online in the UK

You can buy Sildenafil tablets to treat erectile dysfunction online from our registered online service.

After completing an online assessment, our UK registered and trained GP's will review your assessment. If approved, a prescription will be issued which is passed on to our UK registered online pharmacy. The pharmacy team will dispense your order, and dispatch the medication to your chosen delivery address.

Summary

What Are Sildenafil Tablets?

Sildenafil tablets are a treatment for erectile dysfunction in men. They are the most widely prescribed treatment for erectile dysfunction in the UK.

Sildenafil is the generic form of the well-known drug, Viagra. 

Sildenafil is significantly cheaper and is the version that is usually prescribed by the NHS. They are a popular choice of treatment for erectile dysfunction, as medically there is no difference between Sildenafil and its branded alternative.

You can also read more about Sildenafil, other ED treatments and condition information at the NHS Choices website.

Effectiveness

The effectiveness of Sildenafil is proven in clinical trials against placebo. In men who suffered from erectile dysfunction, ~80% of those who took Sildenafil managed to achieve an erection, compared to around 17% of the group who were given water pills.

You can find out more about experiences with Sildenafil, from our UK patient Sildenafil reviews.

How it works

Sildenafil is from a class of drug called PDE inhibitors and when taken causes blood vessels to relax. Men who suffer from ED are unable to pump enough blood into the penis to achieve a hard enough erection. Sildenafil works by stimulating blood flow to the penis when a man is sexually aroused. This helps men with ED to achieve firmer and longer-lasting erections.

How to take Sildenafil

The typical starting dose for Sildenafil is ONE 50mg tablet 30 minutes before sexual activity. Most men will find this dose effective, however, if 50mg is too strong, you may wish to half the tablet the next time you are taking the medication. If successful, a 25mg tablet may be more suitable for your next prescription. 

If the 50mg does not achieve the desired result, you should try the same dose 2-3 more times, to see if you can achieve a satisfactory erection. If this is not successful, you can increase your dosage to 100mg.

If a 100mg dose is also ineffective, speak to us about the next steps. It is advised to try it at least 5 times before giving up. However, Sildenafil should not be taken more than once in 24 hours.

If you have already used a few erectile pills without success, a face to face referral may be required. 

If you have not yet tried one of the other ED medications, you may find that Tadalafil or Vardenafil is effective for you.

Patients will find different drugs more effective. This does not necessarily mean one drug is more effective than another. It can be that your body responds slightly differently to a particular medication.

Sildenafil Dosage

Sildenafil is available in 3 strengths; Sildenafil 25mg, Sildenafil 50mg and Sildenafil 100mg. The strength required, will depend on the severity of your ED, and it may require a couple of trials to find the right strength for you. Below is a dosage table to describe which strength is typically used and when.

Further Reading: Sildenafil 50mg vs 100mg

Side Effects

With all medication, there is always a risk of side effects occurring. Sildenafil is well tolerated, and most side effects will go away once your body is used to the treatment.

The most common side effects are

• Headaches / Dizziness
• Flushing
• Runny/stuffed nose
• Upset stomach / Nausea / Diarrhoea
• Red and/or warm skin
• Muscle pain / Back Pain
• Blurred vision

The side effects listed below are more serious, and you should stop taking Sildenafil, and report these to your doctor or pharmacist immediately;.

• An erection that will not go away (priapism). If you have an erection that lasts more than 4 hours, seek medical help immediately. Priapism can permanently damage your penis.
• Sudden vision loss in one or both eyes. Sudden vision loss in one or both eyes can be a sign of a serious eye problem called non-arteritic anterior ischemic optic neuropathy (NAION). Stop taking Sildenafil and call your healthcare provider right away if you have sudden vision loss in one or both eyes..
• Sudden hearing decrease or hearing loss. Some people may also have ringing in their ears (tinnitus) or dizziness. If you experience these symptoms, stop taking Sildenafil and contact a doctor right away.

For a full list of side effects, please read the patient information leaflet.

Alternatives

Although Sildenafil provides the most affordable treatment, it may not always be best suited to your needs. Levitra (or Vardenafil) is the most suitable treatment for people who suffer from diabetes, while Cialis (or Tadalafil), provides a longer-lasting effect. There is also now an over the counter option of Sildenafil in the form of Viagra Connect. This contains Sildenafil 50mg. 

Vitaros cream is another alternative to oral medications in treating erectile dysfunction. If you have difficulty swallowing tablets, Nipatra (chewable sildenafil), is available.

Sildenafil Oral Jelly is another alternative, however this is an unlicensed treatment in the UK, and is not available to buy from a legal online pharmacy.

You can also look at counselling since some men suffer from erectile dysfunction as a result of nerves. If you think your ED is psychological, therapy may provide long term benefits if successful. 

Comparisons of Sildenafil with other main ED medications are below.

• Sildenafil vs Viagra
• Sildenafil vs Tadalafil 

Prices

Sildenafil 25mg Tablets (Viagra Generic)

Sildenafil 50mg Tablets (Viagra Generic)

Sildenafil 100mg Tablets (Viagra Generic)

FAQ

Can you take Sildenafil for erectile dysfunction?

Yes. Sildenafil is the active ingredient in Viagra and is one of the most widely used drugs for erectile dysfunction.

What is Sildenafil?

Sildenafil is a drug used in the treatment of Erectile Dysfunction. It is the active ingredient in Viagra and is of the class of drugs known as PDE5 inhibitors.

How Does it Work?

Sildenafil is a class of drug (like Cialis / Tadalafil) known as a PDE-5 inhibitor. When sexually stimulated, it helps maintain a relaxed muscle state and increases blood flow to the penis which helps facilitate an erection

How much is Sildenafil?

Sildenafil tablets can vary in price from genuine UK online pharmacies, from between £0.98 / Tablet, to £10.40 / tablet, depending on strength and quantity

What is the dosage of Sildenafil?

Usually, when starting to take Sildenafil, your doctor will recommend starting on a 50mg dose. This means you will take a 50mg tablet, around 30-60 minutes before sexual activity. The maximum dose is 100mg in a 24 hour period.

How long does it take Sildenafil to take effect?

Sildenafil takes around 30-60 minutes to take effect, and so should generally be taken around half an hour before sexual activity.

What is the difference between Sildenafil and Viagra

Sildenafil is the generic form of the better known branded drug Viagra. This means that both medications contain exactly the same active ingredient.

Can I take Sildenafil at the same time as other Erectile Dysfunction Medication?

No. Sildenafil and other ED medications all work in the same way. This means that taking them together can result in overdose and an increased incidence of side effects.

What strengths is Sildenafil available in?

Sildenafil is available as Sildenafil 25mg, 50mg or 100mg Tablets.

How long does Sildenafil last?

The effects of Sildenafil may be noticeable for up to 4 hours after taking your dose.

What is Sildenafil TEVA?

TEVA Sildenafil is simply a specific manufacturer of Sildenafil. Please contact us if you require a specific manufacturer of Sildenafil.

What strengths does Sildenafil come in?

Sildenafil comes in three different strengths. Sildenafil 100mg is the strongest, and there are also 25mg and Sildenafil 50mg strengths available. Detailed information can be found in our article "Comparing Sildenafil Strengths".

Can I buy Sildenafil online?

Yes. You can buy Sildenafil online in the UK, from our UK registered online pharmacy and doctor service.

Is it legal to buy Sildenafil online?

Yes. You can safely buy Sildenafil in the UK after completing our online doctor assessment. A legal prescription is issued to our pharmacy if your order is approved. We are regulated by the MHRA and GPHC.

What is better, Sildenafil or Tadalafil?

The main difference between Sildenafil and Tadalafil is that Tadalafil is longer acting, so you may notice the effects for longer.

What is cheaper, Sildenafil or Tadalafil?

Sildenafil is slightly cheaper than Tadalafil currently, but prices are coming down for Tadalafil, as it was only recently made available in the UK

Is chewable Sildenafil available?

Chewable Sildenafil, also known as Bluechew in the USA, is available as Nipatra in the UK.

Further Reading

Can women take Viagra?	Cheapest Viagra - Tesco, Boots and others
How long does Viagra take to work?	How long can the average man stay erect?
What to expect when first taking Viagra?	Is Bluechew available in the UK?
Sildenafil 50mg vs 100mg	Cialis vs Viagra
The Blue Pill - what exactly is it?	Which strength of Sildenafil is best?
Viagra vs Viagra Connect	Viagra over the counter

Written by Qualified Experts

All of our medication and condition content is written by UK qualified pharmacists and doctors.

Author Authored By: Hywel McGlinchy GPhC Registration: 2071234 Date Authored: 12/03/2023

Reviewer Reviewed By: Karim Nassar GPhC Registration: 2064752 Last reviewed on: 12/03/2024

Some of the most commonly asked questions we receive about Viagra and other ED treatments are discussed below

• Is ED a natural part of the ageing process?

  ED is more common in men over the age of 40. This is because conditions such as high blood pressure, diabetes, high cholesterol and obesity are more prevalent. All of these conditions can be a cause of ED, hence dysfunction can be more prevalent as we age.

• Can I take Viagra if I have diabetes or cardiovascular diseases?

  It isn't a problem to take Viagra, or other ED treatments if you are suffering from diabetes  and other cardiovascular diseases. Levitra is generally the best choice of treatment for diabetics. You always need to check that you’re not on any medicines that can interact with Viagra. When you fill in our online assessment, we can check any medicines you are on are safe with your chosen treatment. Please be sure to answer questions fully and honestly.

• Can being tired cause erectile dysfunction?

  Yes. When you're tired, both your libido and ability to get or maintain an erection can be affected. The same goes for a lack of fitness.

• Can alcohol and drugs cause erectile dysfunction?

  Yes - alcohol and drug consumption can increase your chances of experiencing erectile dysfunction.

• Can too much masturbation cause Erectile Dysfunction?

  Yes - If you’re masturbating several times in a short period of time, then you can experience problems getting an erection.

• Can a lot of cycling cause erectile dysfunction?

  Yes, excessive cycling can cause erectile dysfunction, particularly if the seat is uncomfortable and applies pressure to the testicles. This is due to pressure on the nerves at the base of the penis. The same can occur if excessively tight clothing is worn for long periods of time, day after day.

• How can I overcome erectile dysfunction?

  There can be several factors which contribute to erectile dysfunction, which you should consider, such a drug or health induced erectile dysfunction. If you can identify a cause, then eliminating this cause, will reduce the need for medication.

  If your dysfunction is persistent, and you have been unable to identify a cause, you can be prescribed prescription medications, such as Viagra or Cialis, to help overcome erectile dysfunction.

• Which Erectile Dysfunction Drug Is Best?

  Erectile dysfunction drugs have different properties, although all work in the same way. Different people may respond to one type of drug more than another. If cost is a consideration, Sildenafil and Tadalafil are the cheapest, and are the ingredients found in the well known drugs, Viagra and Cialis.

• What vitamins are good for erectile dysfunction?

  Although there is not as much evidence for user as the main erectile dysfunction drugs, the following vitamins have been thought good to assist men suffering from erectile dysfunction

  • Vitamin C - a role in blood flow, which may help erections
  • Vitamin E - a role in production of testosterone, may assist with erectile dysfunction
  • B - Complex - a role in blood flow, which may help improve erectile function.

• Can erectile dysfunction be reversed?

  Whether erectile dysfunction is reversable, may depend on the cause. For some underlying health issues, it may be difficult, however analysing lifestyle, may play a big role in whether you can reverse your erectile dysfunction. You can read more information about a recent study done at Adelaide University, on the role of lifestyle factors in erectile dysfunction.

Before taking Sildenafil or any medication, it is important to read the Patient Information Leaflet.

• Sildenafil PIL

Cautions

Alpha-blockers and Sildenafil

If you are taking alpha-blocking medicines for high blood pressure or pulmonary arterial hypertension, such as tamsulosin or trazodone, you are advised to leave at least six hours between taking your alpha-blocker and Sildenafil.

Nitrates and Sildenafil

Sildenafil cannot be prescribed by our doctor if you are taking nicorandil or nitrate-based medication, such as GTN spray or isosorbide mononitrate tablets for angina, chest pain or heart problems. It is not recommended to take SIldenafil if you are at risk of a heart attack.