Sildenafil (generic Viagra)

  • Viagra
  • Sildenafil
  • treat erectile dysfunction

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Sildenafil (generic Viagra)

  • Medication features

    Sildenafil is a reliable treatment for erectile dysfunction, and it is safe for men of all ages, even those over 75 years old.

    • Effective for 66-82% of men
    • Works within 60 minutes
    • Cheaper/unbranded version of Viagra
    • Lasts for up to 5 hours after taking the pill
    • Lowest Price Guarantee
    • Next Day Delivery Available

    Registered UK Pharmacy Number 1039428


If you require a particular manufacturer of Sildenafil, please contact us after placing your order.

NOTE: After selecting this product, you will need to complete a short assessment, so we can make sure this medication is suitable for you.

Buy Sildenafil online in the UK

You can order Sildenafil or Viagra online through our UK-registered online pharmacy, Ashcroft Pharmacy. Once you've completed your assessment and checkout process, our in-house pharmacist will review your order to determine if the treatment suits you. If approved, our pharmacy team will prepare and send your medication to your provided address

Why choose Sildenafil?

Get the same results as Viagra tablet without the brand-name price tag.

Sildenafil tablets, the generic equivalent of branded Viagra, contain the same active ingredient (sildenafil citrate) and offer the same effectiveness in treating erectile dysfunction (ED). With Sildenafil, you can enjoy the same benefits as Viagra tablet without paying a premium for the brand name.

  • Proven effectiveness: Sildenafil has been extensively studied and proven to be effective in treating ED, helping men achieve and maintain erections for satisfying sexual experiences.
  • Trusted generic alternative: Sildenafil is a widely used and trusted generic medication, offering the same quality and efficacy as Viagra at a more affordable price.
  • Cost-effective solution: Save money without compromising on quality. Sildenafil provides the same results as Viagra without the brand-name price tag.

What is Sildenafil?

Sildenafil (viagra tablet) is an effective treatment for erectile dysfunction in men, grouped under PDE5 inhibitors. It helps to increase blood flow to the penis when you are sexually stimulated, resulting in a firmer and longer-lasting erection.

It is often known as the generic version of the popular erectile dysfunction medicine Viagra (blue pill). It functions similarly to branded Viagra but comes at a lower cost.

What is the difference between Sildenafil & Viagra?

Sildenafil (Generic Viagra) and Viagra (Branded) are the same treatment for ED. They work the same way and have the same benefits. The only real difference is the price. Sildenafil is only £0.80, whereas Viagra is £8.45 per tablet.

How does it work?

Sildenafil or Viagra temporarily increases blood flow to your penis when you're sexually aroused. When you feel sexually excited, a chemical called cGMP is released, relaxing the smooth muscles in the penis. This relaxation lets more blood flow in, leading to an erection.

Remember, It doesn't boost your sexual desire. If you're dealing with low libido, it's best to consult your doctor or pharmacist for advice.

How to take Sildenafil?

Take one tablet around 1 hour before having sex. Food can affect how Sildenafil is absorbed, so take it on an empty stomach or with a light meal for the best results.

Sildenafil's effectiveness

Sildenafil or Viagra successfully treats ED in approximately two-thirds of cases (<65 years, 80%; 65-74 years, 69%; ≥75 years, 59%), but its effectiveness may decrease if you've had a big meal or consumed more than 1-2 units of alcohol.

The study confirmed that 25 mg/50 mg and 100 mg of Viagra tablet significantly enhanced erection quality and treatment satisfaction, reduced anxiety levels, and improved the overall sexual experience compared to the placebo.

Remember that Viagra tablet may not be effective on the first try. Use it at least eight times before considering other options. If 50 mg isn't effective, consider 100 mg for better results. If 50 mg causes side effects, switch to 25 mg; it's still effective for treating erectile dysfunction.

When does it start working?

Sildenafil tablets usually start working within 30-60 minutes. The highest amount of sildenafil citrate in your bloodstream happens around 60 minutes after you take it. Still, you might begin feeling its effects in approximately 30 minutes.

How long does Sildenafil effects last?

Generally, Sildenafil lasts approximately 2-6 hours, giving you an excellent time to engage in sexual activity with improved erectile function. It won't keep it up indefinitely after sex. The results of Sildenafil gradually fade over time and will be gone within a day.

Is Sildenafil safe?

Sildenafil or Viagra is an FDA-approved and safe medication when used as directed. Still, it's important to note that it can interact with certain other medicines.

Sometimes, these interactions can pose a risk and potentially harm health. However, there's no evidence of long-term side effects. However, if you have certain health conditions, please consult your doctor before taking it.

Please refer to the NHS online resource on Sildenafil (Viagra).

What if it doesn't work for me?

If Sildenafil doesn't work for the first time, don't give up. Try at least eight separate occasions. Sometimes, your body needs time to get used to the medication before it starts working effectively.

Alcohol consumption, meals, and mood can influence how well it works. So, consider trying Sildenafil in various situations to find what works best.

If you find that it's still not effective after attempting it eight times, it's advisable to consult with your doctor or pharmacist.

How can I get the best results from Viagra tablet?

To get the best results from viagra, it's important to follow the directions carefully. This includes taking it on an empty stomach and not drinking too much alcohol. Sildenafil or Viagra works faster when taken on an empty stomach.

If you take it after eating, it might take longer to work, especially if you've eaten a large, high-fat meal. This is because food can slow down the absorption of the medication into your bloodstream.

Tips for using Viagra tablet:

  • Take it about an hour before you plan to have sex.
  • Avoid eating a large meal before taking it.
  • Limit your alcohol intake before or after taking sildenafil.

Other Tips include:

  • Diet changes, such as reducing alcohol and fat intake
  • Reducing stress levels
  • Quit smoking (help for this can be found on our website)
  • Talk to your doctor if you have any other health conditions, such as heart disease or high blood pressure.
NameMr Suhail Jamil
RoleSuperintendent Pharmacist
GPhc Number2069518


 Sildenafil 25mg/50mg/100mg Prices in the UK
Sildenafil 25mgPrice
1 Tablet£0.80
4 Tablets£5.49
8 Tablets£8.49
Sildenafil 50mg Price
1 Tablet£0.80
4 Tablets£6.99
8 Tablets£12.99
Sildenafil 100mg Price
4 Tablets£7.99
8 Tablets£14.99


Sildenafil Package leaflet: Information for the user PDF

Only FDA-Approved Authorized Generic Version of Viagra® (sildenafil citrate)

For Healthcare Professionals (SmPC) PDF

More About Sildenafil

NHS-UK about Sildenafil (Viagra)

Aboout Erectile dysfunction (impotence)

Efficacy and Safety of Sildenafil by Age

ORIGINAL RESEARCH—ED Treatment: Sildenafil Citrate

Sildenafil in the treatment of ED: an overview of the clinical evidence

FDA-approved Indications about Sildenafil



Sildenafil 25/50/100 mg dosage for ED

Sildenafil comes in 3 different strength: 25/50 and 100mg. 50mg is the recommended dose for those people who have not used this before, as it is a sufficient strength for most people with erectile dysfunction.

If you're using it for the first time, the typical dose is 50mg. Take one tablet approximately 30-60 minutes before engaging in sexual activity.

If the effects aren't as desired, you can increase the dosage to 100mg. However, before making any changes, it's recommended to consult your doctor or pharmacist. The amount of Sildenafil you take depends on your situation. Always follow your doctor's advice or the label instructions. Learn more about Sildenafil 50 mg vs 100 mg

  • Adults under 65: Take 50mg daily, an hour before sex. You can also take it 30 minutes to 4 hours before.

  • Adults 65 and older: Take 25mg once a day, an hour before sex. You can also take it 30 minutes to 4 hours before sex.

Recommended Dose

For most patients, the suggested dose is 50 mg taken as needed, around 1 hour before sexual activity.


The highest advised frequency of dosing is once per day.


Who shouldn't take Sildenafil?

Don't take Sildenafil if you have:

  • Certain anatomical penis deformities
  • Eye problems (excluding poor vision)
  • Sickle-cell anemia
  • Low blood pressure
  • An allergy to its ingredients
  • Recent heart issues like heart attack or stroke
  • Angina
  • Liver or kidney problems
  • Certain cancers or bleeding disorders
  • Stomach ulcers

Here are some additional things to keep in mind about Sildenafil:

  • Sildenafil is not a cure for ED, but it can help men achieve and maintain an erection when they are sexually aroused.
  • It will be most effective when it taken on an empty stomach.
  • Viagra should not be taken with nitrates, which are often used to treat heart conditions.
  • It can interact with other medications, so it is important to tell your doctor about all the medications you are taking.


It's important not to exceed the recommended maximum dosage. Taking more won't provide additional benefits and can lead to unwanted side effects. Don't take more than 100mg of Sildenafil within 24 hours, as it can be risky and cause low blood pressure or priapism. Seek medical help if needed. For the proper dosage, Consult your doctor or pharmacist.

You might be eligible for treatment but consult your doctor first.


  • Is branded Viagra better than generic sildenafil?

    Both medicines contain the same active ingredient and work in the same way. They are equally effective. The only difference between them is the cost. However, personal preference is also a factor. Therefore, some people may prefer branded Viagra to Sildenafil (generic viagra) and vice versa.

  • Is tadalafil/Cialis daily better than sildenafil/Viagra?

    Sildenafil vs Tadalafil

    Both drugs are similarly effective in treating erectile dysfunction. The better drug must be decided by personal preference.

  • Can tadalafil/Cialis daily and sildenafil/Viagra be taken together?

    No, using them together is not advised, as they can interact with each other and cause unwanted side effects.


  • How often can I take sildenafil?

    You can take one sildenafil tablet per 24 hours. Take at most four times a week.

  • Can I take sildenafil for sexual enhancement without experiencing erectile dysfunction?

    No. You should only take Sildenafil if you have erectile dysfunction. Sildenafil will not work for sexual enhancement.

  • Can I take sildenafil with my other medication?

    This depends on which other medications you are taking. Before you can buy Sildenafil, you must complete our online consultation, where we will check that your other drugs do not interact with Sildenafil before we prescribe it to you.

  • Can I drink grapefruit juice if I have taken sildenafil?

    Grapefruit interacts with Sildenafil, which may increase your chances of getting side effects. Therefore, grapefruit should be avoided while taking Sildenafil.

  • Can I take 2 sildenafil tablets at once?

    No. The maximum sildenafil dose is 100mg; instead of taking two 50mg tablets, switching to the 100mg tablet is recommended and only taking one. Taking higher doses than the maximum dose will not help you achieve a better erection.

  • Can I drink alcohol if I am taking sildenafil?

    Yes, but only in small quantities. Too much alcohol while taking Sildenafil may increase your chance of experiencing side effects and also make erectile dysfunction worse.

  • How long Sildenafil lasts?

    About 4 hours on average. It might be different for you, depending on factors like your metabolism.

  • Can I Use Sildenafil with other medication?

    Don't take Sildenafil if you're using nitrates, "poppers," Riociguat, other ED medication, HIV meds, certain blood pressure meds, or meds for prostate enlargement. Inform your doctor or pharmacist of any medication or recreational drugs.

  • Can I drive after taking sildenafil?

    Sildenafil might make you dizzy or lightheaded. Assess your response before driving or using machinery.

  • Can women take sildenafil?

    Sildenafil only treats ED, not libido. Don't use it if you're a woman, as it might cause unwanted effects.

  • Can I order sildenafil for my partner?

    Consultations are individual and can't be done for someone else. It's for safety and best results.

  • Can I take more than one sildenafil tablet daily?

    No, don't take more than one sildenafil tablet in 24 hours. Talk to your doctor or pharmacist about changing the dose or trying a new treatment.

  • Can I use sildenafil with other ED treatments?

    No, don't combine Sildenafil with other ED treatments. Leave 24 hours between them.

  • Is Sildenafil safe for long-term use?

    Generally safe for long-term use. Consult your doctor if you have health conditions.

  • If Sildenafil doesn't work ?

    Give it a chance by trying it eight times on separate days. Factors like food and mood can affect how it works.

  • How much alcohol can you drink with sildenafil?

    How much Sildenafil and alcohol is too much? If you plan to have alcohol while using Viagra, do so responsibly. It's advisable to limit your alcohol consumption to 1–2 drinks per day. Alcohol in moderation might be okay. Too much alcohol can make it less effective.

  • Is sildenafil as good as Viagra?

    They're very similar, but Viagra costs more and Sildenafil at a lower cost.

  • Which brand is best for sildenafil?

    Sildenafil is the generic version of two well-known brand-name products: Viagra and Revatio. The FDA approves these drugs for different health conditions. Viagra treats ED (erectile dysfunction), while Revatio is approved for pulmonary arterial hypertension (PAH), a type of high blood pressure in the lungs' arteries.

  • Which is better, Cialis or sildenafil?

    Both drugs provide a similar quality of erection, but a study suggests that slightly more men achieved a satisfactory erection with Sildenafil. However, as mentioned earlier, tadalafil (Cialis) stays in the bloodstream longer. In the same study, more men preferred tadalafil, possibly because of its longer-lasting effects.

  • Does sildenafil raise your heart rate?

    Yes, Sildenafil can lead to an increase in heart rate. This effect is likely caused by the decrease in blood pressure that Sildenafil can induce. Another reason for the rise in heart rate could be the potential increase in sympathetic activation caused by Sildenafil.

  • Which Viagra is good for first time?

    If you're using Viagra for the first time, starting with 50mg is usually recommended. This dose is adequate for most men and offers a good balance between desired effects and potential side effects. Depending on your health and any other medications you're taking, a doctor might suggest starting with 25mg in some cases.

  • Where can I buy Sildenafil?

    Online pharmacies, such as Ashcroft Pharmacy UK, offer Sildenafil following an online consultation. We stock various brands with no clinical differences among them.

Side Effects

Sildenafil tablet side effects

Most men can take Sildenafil without any side effects. The common ones, affecting about 10% of men, include headache, flushing, dizziness, stuffy nose, nausea, hot flush, indigestion, and temporary vision changes like blurriness or a tint.

Tips: Drinking water and avoiding alcohol can help reduce Sildenafil's side effects. You can read our Full Guide on "How to Manage Sildenafil Side Effects"


Once your order has been approved by our UK medical team it will be dispatched via Royal mail. All orders are sent using a tracked and signed for service.

Royal Mail 48 | £4.25

Your order will usually be delivered to you in 2-3 working days.

RM 24 (Next working day)  | £7.49

Your order will usually be delivered to you in 1 working day.


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Sildenafil (generic Viagra)