Viagra (Sildenafil)

You can buy Viagra or sildenafil safely in the UK through a few different options:

1. Online services: Trusted providers like UK Meds allow you to request treatment following a quick online consultation. A registered prescriber reviews your answers to ensure the medication is appropriate for you. There’s no need for a GP visit.
2. Pharmacies: Many high street and online pharmacies stock Viagra Connect, which is available without a prescription. For other forms of Viagra or sildenafil, a valid prescription is required.

Viagra is available on the NHS in limited cases. Most people are prescribed sildenafil, the more affordable, generic version of Viagra. Always buy from licensed, reputable providers to ensure the medicine is genuine and safe.

What’s the Cheapest Way to Get Viagra in the UK?

Generic sildenafil offers the same results as branded Viagra at a lower cost. To buy it safely and affordably:

• Use a trusted online service like UK Meds
• Complete a free consultation for a private prescription
• Receive genuine, clinically approved treatment with discreet home delivery

Avoid buying from unverified sites, as counterfeit medicines can be dangerous, ineffective, and illegal. Always read the patient leaflet and follow the prescriber’s advice. If you experience side effects, seek medical help immediately.

Can I Get Viagra on Subscription?

Yes, you can get Viagra or sildenafil on subscription through UK Meds. This offers a convenient way to manage your erectile dysfunction treatment, with automatic deliveries so you never run out.

After completing a quick online consultation, a prescriber will assess your suitability. If approved, you can choose between a one-off order or a monthly subscription plan. With a subscription, your medication is sent to you regularly without needing to repeat the consultation or checkout process each time.

You can manage or cancel your plan easily at any time. Subscriptions can be a cost-effective and discreet way to stay on top of your treatment, especially when compared to other providers like Numan, Manual and Hims.

Do I Need a Prescription for Viagra in the UK?

Most types of Viagra, including the generic version sildenafil, are classed as prescription-only medicines (POMs) in the UK. This means a healthcare professional must assess whether the treatment is safe and suitable for you before it can be supplied.

You don’t need an existing prescription to buy Viagra online at UK Meds. Simply complete a free online consultation, and if you’re eligible, a registered prescriber will issue a private prescription.

Why Is a Prescription Required?

Viagra is a potent medication that can interact with other medicines or be unsuitable for people with certain health conditions, such as heart problems or low blood pressure. A prescription helps ensure it’s used safely and appropriately.

• May interact with other medications you’re taking
• May not be suitable for individuals with specific medical issues

If you’re looking for a non-prescription option, Viagra Connect is available as a pharmacy medicine (PMED). It doesn’t require a prescription, but you’ll still need a brief consultation with a pharmacist to confirm it's safe for you.

How to Get an Online Prescription for Viagra

1. Complete a medical consultation at UK Meds
2. A registered prescriber will assess your suitability
3. If approved, your treatment is sent to you directly with discreet delivery

Can I Buy Viagra Without a GP Appointment?

Yes. Online services like UK Meds offer a safe alternative. You complete a short questionnaire and, if suitable, a prescriber issues a prescription, no face-to-face appointment needed.

Is Viagra Available in My Area?

Find yourself searching for "sildenafil near me" or "viagra near me"? If so, you can order Viagra online from anywhere in the UK through UK Meds. Whether you’re in London, Leeds, Glasgow or elsewhere, next-day delivery is available nationwide.

Popular cities we serve include:

• London
• Manchester
• Glasgow
• Edinburgh
• Birmingham
• Leicester
• Leeds

For detailed local guides, visit our blog pages on buying Viagra in each city.

Should I Buy Generic Viagra or Branded?

Generic Viagra (sildenafil) contains the same active ingredient as branded Viagra and is equally effective. The main difference is the price, generics are typically cheaper as they are produced by multiple manufacturers without branding costs. If you're looking to save money, ask your doctor or pharmacist about switching to sildenafil, an affordable and clinically approved ED treatment option.

Is Generic Viagra Just as Good?

Yes. In the UK, both branded and generic versions must meet the same safety and quality standards set by the MHRA. The choice usually comes down to personal preference and budget.

Why Is Viagra More Expensive Than Sildenafil?

Viagra is more expensive because it’s a branded product. The cost reflects:

• Research and development
• Brand marketing and packaging
• Patent and licensing costs

Sildenafil is a generic version, widely produced and regulated, which helps reduce the cost. Both work in the same way to treat erectile dysfunction.

Ordering Viagra from Retailers

Here's where Viagra is available (or not):

• Available: Boots, Lloyds Pharmacy, Superdrug, Asda, Numan, Manual, Hims
• Not available online: Amazon, Tesco (at time of writing)

For better prices and subscription options, consider buying through UK Meds.

Choose the Best Delivery Options

Decide on the best discreet delivery option for your order below.

Please note: Delivery options and pricing are subject to change. For the latest information on UK Meds delivery options please visit our delivery page to learn more. You can also read our other policies including our returns process.

Choose the best cost option for you:

Starting prices for all pack sizes of branded Viagra and sildenafil (generic Viagra).
Strengths available: 25mg, 50mg and 100mg

Please note: Pricing is subject to change. For the latest information please refer to the consultation section at the top of the product information page. 

Always read the patient information leaflet inside your medicine box before you start treatment. We've provided the PIL for each strength of Viagra and sildenafil below:

Viagra® information leaflet

• Viagra 25mg, 50mg and 100mg patient information leaflet

Sildenafil information leaflet

• Sildenafil 25mg, 50mg and 100mg patient information leaflet

Read first-hand what UK Meds customers say about Viagra and how it has impacted their lives with erectile dysfunction (ED) in the reviews above.

For more experiences, you can also read a wide range of Viagra reviews on Drugs.com and WebMD.

Remember, everyone’s experience with Viagra (sildenafil) can be different. Just because it didn’t work for someone else doesn’t mean it won’t work for you.

If you think Viagra might be right for you, speak to your doctor or healthcare professional. They can advise if it’s suitable, and you can then judge your own experience.

Always consult your healthcare provider before starting any medication to make sure it’s safe and right for you.

Watch Dr Andrew Hart-Pinto explain everything you need to know about Viagra in this overview by JHP Medical UK.

What Is Viagra and How Does It Work?

Viagra, sometimes known as the "little blue pill", is a well-known treatment for erectile dysfunction (ED) in adult men. Its active ingredient, sildenafil, is part of a group of medicines called PDE5 inhibitors, which help improve blood flow to the penis during sexual arousal.

Viagra only works when you're sexually stimulated and will not cause an erection on its own. It has been a trusted treatment since its release in 1998 and continues to be widely used today.

You can choose between branded Viagra or its generic version, sildenafil. Both work in the same way and are equally effective, but generic sildenafil is often more cost-effective. Both options are available through UK Meds following an online consultation.

To learn more, see our A-Z guide to Viagra.

How Effective Is Viagra?

Viagra is clinically proven to help with ED and has a high success rate (Fink et al, 2022; Goldstein et al, 1998; Wagner et al, 2001), especially when used correctly. Research shows:

• 25mg dose: Effective in 62% of men
• 50mg dose: Effective in 74% of men
• 100mg dose: Effective in 82% of men

Overall, it has a reported success rate of up to 91% for men with erectile dysfunction (Sairam et al, 2002).

Effectiveness can vary based on individual health and lifestyle. You may be able to improve results through simple lifestyle changes.

What Causes Erectile Dysfunction?

ED can be caused by a range of physical and psychological factors. Common causes include:

Physical causes:

• Heart disease
• High blood pressure
• Obesity
• Diabetes
• Hormonal imbalances

Psychological causes:

• Stress
• Anxiety
• Depression
• Relationship issues

ED can be caused by a mix of both physical and psychological factors. If you're experiencing symptoms, speak to a healthcare professional for personalised advice.

How Should I Take Viagra?

Take one Viagra (sildenafil) tablet with water about 1 hour before sex. It only works if you’re sexually aroused and should not be taken more than once in 24 hours.

For best results, take it on an empty stomach or after a light meal. Avoid heavy or greasy foods as they can delay its effect. It’s also best to limit or avoid alcohol, which can reduce effectiveness and make it harder to get an erection.

Always follow the instructions provided with your medication or consult your prescriber if unsure.

When and How Quickly Does Viagra Work?

Viagra usually starts working within 30 to 60 minutes, but it can begin to take effect as quickly as 12 minutes for some people (Eardley et al, 2002). The best time to take it is around 1 hour before planned sexual activity. Its effects typically last for around 4 to 5 hours.

Factors That Affect How Viagra Works:

• Food: Heavy meals can delay onset and reduce effectiveness
• Alcohol: Can lower its effect and shorten how long it works
• Age and health: Older adults or people with certain conditions may notice longer or shorter effects
• Stimulation: Viagra only works with sexual arousal

How Long Does Viagra Last?

Viagra can remain active in your system for up to 5 hours, but you won’t have a continuous erection during this time. You’ll be able to achieve an erection when aroused, within that window.

Plan your timing carefully. If you're planning sex later in the day, avoid taking your dose too early, as you cannot take another one until the next day.

How Often Can You Take Viagra?

Viagra should only be taken once per day. The usual starting dose is 50mg, but it may be adjusted to 25mg or 100mg based on your response. Never take more than one tablet in 24 hours, and do not take two doses on the same day.

What If the Dose Doesn’t Feel Right?

• Too strong or too weak? Don’t adjust it yourself
• Speak to your prescriber about increasing or reducing your dose

Taking too much Viagra can increase the risk of side effects and serious complications. Always follow your prescriber’s advice.

How to Store Viagra Properly

Keep Viagra in its original packaging at room temperature, away from moisture, direct sunlight, and heat. Avoid storing it in humid places like bathrooms. Always keep it out of reach of children.

Storage Tips:

• Store in a cool, dry place
• Do not use after the expiry date
• Speak to a pharmacist if you need help with storage or disposal

How to Dispose of Viagra Safely

Do not flush Viagra tablets or throw them in the bin. For safe disposal:

• Take unused or expired tablets to a pharmacy
• Ask your pharmacist for disposal advice

Does Viagra Expire?

Yes. Viagra typically has a shelf life of 2 to 3 years. You should always check the expiry date on the packaging and avoid using it after this date, as it may be less effective or unsafe.

• Expired medication: Return it to your local pharmacy
• Check dates regularly before use

Using out-of-date medicine is not recommended. If you’re unsure whether your Viagra is still safe to use, speak to a pharmacist.

Viagra (sildenafil) is available in three strengths: 25mg, 50mg, and 100mg. The right dose depends on your health, how well the medication works for you, and whether you experience any side effects. A healthcare professional will help you choose the most suitable dosage.

50mg

• The recommended starting dose for most men
• Offers a good balance of effectiveness and tolerability

25mg

• The lowest strength, with a reduced risk of side effects
• May be suitable if:
  • You’ve experienced side effects with 50mg
  • You take medicines that may interact with Viagra

100mg

• The highest available dose, offering stronger effects
• Typically used if:
  • 50mg has not been effective
  • You’ve tolerated lower doses without experiencing problems

Always follow medical advice when starting or changing your dose. If the initial dose doesn’t work well or causes side effects, speak to your prescriber before making adjustments.

Can I Take Viagra Every Day?

Viagra can be taken once a day if prescribed, but never more than one tablet in 24 hours. Taking it more often increases the risk of side effects and won’t improve results.

If you’re looking for daily treatment, a lower-dose alternative like Cialis Daily may be more appropriate. Always consult a healthcare professional to find the best option for your needs.

Who Should Not Take Viagra?

Viagra is not suitable for everyone. You should not take Viagra if you:

• Are under 18 or were assigned female at birth
• Do not have erectile dysfunction or are using other ED treatments
• Are allergic to sildenafil or any of the ingredients
• Have severe heart or liver problems, or recently had a heart attack or stroke
• Have low blood pressure or certain rare eye conditions like retinitis pigmentosa or NAION (sudden loss of vision)
• Take nitrate medicines or nitric oxide donors (such as "poppers")

Tell Your Doctor If You Have:

• Peyronie’s disease or any deformity of the penis
• Sickle cell anaemia, haemophilia, or a stomach ulcer
• Severe kidney or liver disease

Medicine Interactions

Viagra can interact with certain medicines and increase the risk of side effects. Always inform your doctor if you’re taking:

• Nitrates for chest pain
• Riociguat or other PDE-5 inhibitors used to treat pulmonary hypertension
• Any medications for blood pressure, heart disease, or erectile dysfunction

Can I Take Viagra With Antidepressants?

Viagra can often be used alongside antidepressants, especially when ED is a side effect of medications like SSRIs or SNRIs. However, this depends on the type of antidepressant you’re taking. Always check with your prescriber to make sure it’s safe for you.

Is Viagra Safe for People With Diabetes?

Yes, Viagra is generally safe for men with type 1 or type 2 diabetes (Rendell et al, 1998). ED is common in people with diabetes due to blood flow and nerve issues related to high blood sugar. A healthcare professional can confirm whether it’s suitable for your individual needs and help you find the right treatment option.

Stay Safe

To ensure Viagra is safe and effective for you, always disclose your full medical history and any medications you take during your consultation. If you're unsure whether Viagra is right for you, speak to a doctor or registered prescriber before starting treatment.

Viagra (sildenafil) can cause side effects, but not everyone experiences them. They are more likely at higher doses. If side effects occur, a lower dose might help. Always follow medical advice and speak to your doctor if you’re concerned.

Learn more about side effects.

Common Side Effects (Up to 1 in 10 people)

• Headache
• Nausea
• Flushing
• Indigestion
• Vision disturbances
• Dizziness
• Stuffy nose

Managing Common Side Effects

Uncommon Side Effects (Up to 1 in 100 people)

• Vomiting
• Skin rash
• Eye irritation or pain
• Rapid heartbeat or blood pressure changes
• Dry mouth
• Cold-like symptoms
• Nosebleeds
• Tiredness

Rare Side Effects (Up to 1 in 1,000 people)

• Fainting
• Stroke or heart attack
• Irregular heartbeat
• Sudden hearing loss
• Dry nose
• Seizures

Serious Side Effects - Seek Emergency Help

Stop using Viagra and call 999 or go to A&E if you experience:

• Chest pain
• Severe allergic reactions (e.g. swelling, difficulty breathing)
• Prolonged erection (lasting over 4 hours)
• Sudden loss of vision
• Severe skin reactions (e.g. blistering, peeling)
• Seizures

How Long Do Viagra Side Effects Last?

Most side effects are short-lived and fade as the medicine wears off. They usually resolve within a few hours, though some like headaches may last longer. Speak to your doctor if symptoms persist.

What Should I Do If I Experience Side Effects?

• Discuss any ongoing or bothersome side effects with your doctor, a lower dose or alternative treatment may help.
• Report side effects to the MHRA Yellow Card Scheme to support medication safety.
• Stop taking Viagra and seek immediate help if you experience serious reactions.

Always read the patient information leaflet before use and speak to a healthcare professional if you’re unsure.

Here are the most frequently asked questions from our ED patients about Viagra, answered by UK Meds.

Does Viagra work for everyone?

Viagra is effective for many men with erectile dysfunction, but it doesn’t work for everyone. If you’ve tried 25mg or 50mg several times without success, your doctor may recommend the 100mg dose. If 100mg also doesn’t help, a different treatment may be more suitable.

Other options like Cialis or Spedra may be recommended. Always follow medical advice before changing treatment.

What to check if Viagra isn’t working:

• Take it on an empty stomach
• Avoid heavy meals and limit alcohol
• Ensure sexual stimulation is present
• Allow 30-60 minutes for it to take effect

Can I get Viagra on the NHS?

The NHS usually prescribes generic sildenafil for ED or pulmonary hypertension. Branded Viagra is only offered in specific cases. Ask your GP if you’re eligible. Learn more on the NHS website.

Does Viagra stop working over time?

Viagra doesn’t typically lose effectiveness due to tolerance, but health changes like diabetes or low testosterone can affect results. If it’s not working as well as before, speak to your doctor about dosage changes or alternative treatments. 

For tips on getting the best results, read our guide: How to Make Erectile Dysfunction Medication Work Better.

Can I travel with Viagra?

Yes, you can travel with Viagra in both hand luggage and checked bags. Keep it in its original packaging and bring a copy of your prescription, especially for international travel. Check local laws before flying. See GOV.UK for more guidance.

Will Viagra make me last longer?

Viagra helps maintain an erection, but it doesn’t treat premature ejaculation. If you need help lasting longer, ask about options like Priligy, EMLA cream or Stud 100.

See our guide: Does Viagra make you last longer?

Will Viagra make my erection bigger?

Viagra doesn’t increase penis size, but it can help achieve a firmer erection by improving blood flow. It supports your body’s natural response to sexual arousal.

Does Viagra help with premature ejaculation?

Viagra is not designed to delay ejaculation. Some studies suggest it may help with confidence, but it’s not a treatment for premature ejaculation. Speak to your doctor about suitable options.

Is Viagra safe if I have high blood pressure?

Viagra is often safe if your blood pressure is well controlled. However, certain medications like alpha-blockers can interact. Always consult your doctor before starting treatment.

Can I take Viagra with nitrate medicines?

No, taking Viagra with nitrate medicines (e.g. for chest pain) is dangerous. It can cause a serious drop in blood pressure (Chamsi-Pasha, H., 2001). Never combine the two. Speak to a doctor for safer alternatives.

Is Viagra safe for men with heart disease?

Viagra may not be safe for some heart patients. Because it affects blood flow, it can cause low blood pressure. Always speak to your doctor before using Viagra if you have heart issues. Additionally, erectile dysfunction can sometimes be an early sign of heart disease. Conditions like atherosclerosis (narrowed arteries) may affect blood flow to the penis before causing problems elsewhere in the body (British Heart Foundation, 2022).

Can I take Viagra after a heart attack?

If you’ve had a heart attack, consult your doctor before taking Viagra. Your heart and medications must be assessed to confirm it's safe.

What’s in Viagra?

Viagra’s active ingredient is sildenafil citrate. Other ingredients include:

• Core: Microcrystalline cellulose, calcium hydrogen phosphate, croscarmellose sodium, magnesium stearate
• Coating: Hypromellose, titanium dioxide (E171), lactose, triacetin, indigo, carmine aluminium lake (E132)

Check the patient leaflet or speak to a pharmacist if you have allergies.

Can I drink grapefruit juice with Viagra?

No. Grapefruit juice can increase sildenafil levels in the body, raising the risk of side effects like flushing, headaches, and low blood pressure. Avoid grapefruit when taking Viagra.

Can I drink alcohol while taking Viagra?

It’s best to avoid alcohol, especially in large amounts, as it can reduce Viagra’s effectiveness and increase the risk of side effects like dizziness and flushing.

Is Viagra dangerous?

Viagra is generally safe when prescribed and used correctly. Avoid it if you take nitrate medicines, and always consult a doctor before starting treatment.

Can women take Viagra?

Viagra is not recommended for women to treat sexual issues, as there’s limited evidence it helps. It may be prescribed to women with pulmonary hypertension under medical supervision.

Can I split Viagra tablets?

Only split tablets if advised by your doctor. Use a pill cutter to ensure even doses. Never alter the dose without medical guidance.

Can you tell if a man has taken Viagra?

There are no obvious signs or tests to confirm if someone has taken Viagra. Side effects like flushing or nasal congestion may occur, but these can have other causes. Open communication with your partner is best.

Can teenagers take Viagra?

Viagra is only prescribed to those over 18 for ED, or to younger patients with pulmonary hypertension. It must always be used under medical supervision.

Does Viagra increase testosterone?

Viagra is not intended to boost testosterone. Some studies suggest minor increases (Spitzer et al., 2013 and Reuters, 2012), but it primarily improves blood flow. If you’re concerned about low testosterone, ask your doctor for testing.

Does Viagra affect fertility?

There is no strong evidence that Viagra affects fertility. It may support conception by improving erections during intercourse. Speak to your doctor if you have fertility concerns.

Can I take Viagra with food?

• Works best on an empty stomach
• Light meals are usually fine
• Fatty or heavy foods may delay effects

Take Viagra about 1 hour before sex and avoid greasy meals around that time.

What Are the Alternatives to Viagra?

If Viagra isn’t suitable or effective for you, there are several alternatives for treating erectile dysfunction (ED). These include other prescription medicines, over-the-counter options, lifestyle changes, and natural approaches.

Non-Prescription and Low-Cost Options

• Sildenafil: The generic version of Viagra. Works the same but is typically more affordable.
• Viagra Connect: A pharmacy-only medicine available without a prescription for men aged 18+.
• Cialis Together: An over-the-counter alternative with effects lasting up to 36 hours.
• Penis pumps: Devices like the Vaxaid V30 improve blood flow and can be used with or without medication.

Prescription Alternatives to Viagra

If Viagra hasn’t worked or isn’t suitable, other ED medications may be recommended:

1. Cialis (tadalafil): Effective for up to 36 hours after one dose.
2. Cialis Daily: A low-dose daily tablet that helps you stay ready anytime.
3. Spedra (avanafil): Fast-acting, with results in as little as 15 minutes.
4. Levitra (vardenafil): A well-tolerated and reliable ED treatment.
5. Vitaros (alprostadil cream): Applied directly to the penis, works within 5–30 minutes.

Healthy Lifestyle Changes

Improving overall health can enhance sexual performance and help ED treatments work more effectively. Consider:

• Regular exercise and maintaining a healthy weight
• Eating a balanced diet and limiting alcohol
• Quitting smoking to support blood flow and cardiovascular health

These changes also help manage related conditions like diabetes, high cholesterol, and heart disease. Learn more in our guide on making ED treatments more effective.

Counselling and Mental Health Support

When ED is caused by stress, anxiety, or low libido, therapy or counselling may help. Your GP or prescriber can refer you to appropriate support services.

Natural and Holistic Approaches

• Pelvic floor exercises: Can strengthen muscles involved in erections and improve control.
• Healthy habits: Nutritious eating, reduced alcohol intake and smoking cessation support overall sexual health. See foods that may help in our guide on natural erection-boosting foods.

UK Meds is committed to providing you with the most accurate information possible regarding healthcare and lifestyle, as outlined in our Editorial Policy and Content Policy. We aim to regularly peer review and update our content as necessary to give you the most up-to-date medical information, helping you to be fully informed before starting a consultation with a registered prescriber for the treatment that you need.

Please note that our content is not a substitute for professional medical advice. Before starting any treatment or making any changes that could affect your lifestyle, you should always speak with your doctor, pharmacist or healthcare provider to ensure that it is safe and suitable for you.

10th July 2025

• NHS - Sildenafil (Viagra)
• Drugs.com - Viagra
• WebMD - Viagra Oral
• ScienceDirect - Sildenafil
• BNF - Sildenafil
• Patient.info - Sildenafil (Viagra)

• How Does Viagra Work - Learn how Viagra helps with erectile dysfunction.
• When Should I Take Viagra for the Best Results - Discover the best time to take Viagra for maximum effectiveness.
• How Long Does Viagra Take to Work - Find out how quickly Viagra starts working after you take it.
• How Long Does Viagra Last - Learn how long the effects of Viagra last after taking it.
• Difference Between Viagra, Viagra Connect, and Sildenafil - Understand the differences between these medications.
• Does Viagra Make You Last Longer? - Learn whether Viagra can help with lasting longer in bed.
• How Often Can You Take Viagra - Find out how frequently you can safely take Viagra.
• Can You Build a Tolerance to Viagra? - Learn if your body can get used to Viagra over time.
• Making Erectile Dysfunction Medication Work Better - Tips for improving the effectiveness of Viagra and similar treatments.
• Cialis vs Viagra: Which Is Best? - Compare the benefits of Cialis and Viagra to choose the right one.
• Comparing Viagra, Cialis, and Levitra - A detailed comparison of these erectile dysfunction medications.
• Alternatives to Viagra - Discover other medications that can help with erectile dysfunction.
• What is it Like to Take Viagra - Real-world experiences of taking Viagra.
• Can Women Take Viagra? - Explore whether Viagra is safe or effective for women.
• Does Viagra Work for Women? - Find out if Viagra can be effective for women’s sexual health.
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