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Pack of 4 Teva 50mg Sildenafil film-coated oral tablets

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You will choose your delivery option at the checkout. Delivery options may vary depending on the pack size and dosage chosen.

Order Sildenafil Online

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Pack of 4 Teva 50mg Sildenafil film-coated oral tablets

Sildenafil is an affordable treatment for erectile dysfunction, that is effective for 74% of men who try it. Sildenafil starts working within an hour of taking it, and lasts for up to 6 hours.

Sildenafil is the generic version of Viagra, and works in the same way at a lower cost.


Start Order

To place an order, fill in a brief questionnaire. One of our doctors will review your order and prescribe a suitable treatment.


4 tablets from £15.00 (50mg)
8 tablets from £27.00
12 tablets from £40.50
16 tablets from £45.00
28 tablets from £78.00

25mg, 50mg and 100 mg tablets available.

Telephone consultation available at £25

In a hurry? Choose Click and Collect and pick up your order after just 4 hours from a Superdrug Pharmacy.

Delivery options

Delivery method Cost Estimated delivery

You will choose your delivery option at the checkout. Delivery options may vary depending on the pack size and dosage chosen.

Fully trusted and UK-regulated

✔ Regulated by the CQC

✔ GPhC-registered pharmacies

✔ Approved by the MHRA

About Sildenafil and How to Order it Online

Can I buy Sildenafil online?

You can buy Sildenafil safely and legally from trusted online sellers, such as Superdrug Online Doctor. All orders are delivered in discreet packaging, and our doctors can provide free expert advice if you have any questions about Sildenafil.

Sildenafil is a prescription-only medication. Online doctor services that can prescribe Sildenafil, like Superdrug Online Doctor, are the only safe and legal option if you want to buy Sildenafil online. Our doctors assess your health and will only prescribe if it's safe and appropriate for you to take Sildenafil. Any online pharmacy which is prepared to sell Sildenafil without a prescription is untrustworthy, and could potentially be selling fake or dangerous medication.

If you’re not sure about buying your medication online, make sure the site you’re buying from is properly regulated by organisations like the Care Quality Commission and Medicines and Healthcare products Regulatory Agency

Can I buy Sildenafil over the counter?

Sildenafil is a prescription-only medication, so you cannot buy it over the counter.  However, there is an alternative that works in the same way called Viagra Connect that is available over the counter without a prescription.

Pack Size Sildenafil 25mg Sildenafil 50mg Sildenafil 100mg
4 tablets £18 £15 £25
8 tablets £27 £28 £35
12 tablets £40.50 £48 £60
16 tablets £45 £60 £76
28 tablets £78 £78 £100

Superdrug Online Doctor prices include your doctor assessment and delivery charge.

Sildenafil:

  • is a tablet that can help you get and keep erections 
  • is the generic version of the branded erectile dysfunction treatment, Viagra
  • contains sildenafil citrate, the same active ingredient in Viagra
There are a few different manufacturers of Sildenafil, including Teva. There are also some kinds of Sildenafil that aren’t approved in the UK, like Sildamax.

What strengths of Sildenafil are there?

Sildenafil comes in 3 strengths, 50mg, 25mg, and 100mg:

  • 50mg is the dosage most people start on and it works for most men who try it
  • 25mg is the dosage you could try if you’ve already tried 50mg and it worked but you had some mild side effects – 25mg might improve these side effects
  • 100mg is the dosage you could try if you tried 50mg and you didn’t get any side effects but you also didn’t see the results you hoped for – 100mg can work when 50mg doesn’t
Make sure to check with a doctor before switching the dosage of any medication
If you’ve never used Sildenafil before and you’re not sure which dose to try, we recommend 50mg.

Because they’re the same medication, Sildenafil and Viagra have the same dosages. See our page on Viagra (Sildenafil) Dosages for more information.

How does Sildenafil work?


Sildenafil works the same way as Viagra. It improves the blood flow to your penis, making it easier for you to get an erection that’s hard enough for sex if you’re sexually aroused. 

See our How Viagra (Sildenafil) Works page for more information.

How to take Sildenafil

Taking Sildenafil is easy, just like any other tablet you swallow:

  • Before taking Sildenafil, read the patient information leaflet that comes with your medication
  • Take Sildenafil one hour before you want to have sex
  • Swallow your tablet whole, with water if needed
  • Do not take Sildenafil more than once every 24 hours
  • For the best results, avoid eating heavy meals or drinking alcohol before using Sildenafil 
  • You may need to take Sildenafil on up to 8 times (on different days) before you see the full effect

How long does Sildenafil last?

  • Sildenafil starts working around 30 to 60 mins after you take it
  • Sildenafil normally lasts around 4 to 6 hours
  • Sildenafil may take longer to work if you eat a heavy meal or drink alcohol beforehand
  • If you want a medication that lasts longer, you could think about trying Cialis
  • If you want a medication that works quicker, Spedra starts working in just 15 and Cialis Daily works constantly so there’s no waiting time

See our How Long Does Viagra (Sildenafil) Last page for more information.

Does Sildenafil work for women?

Sildenafil is not proven to work for women, and it may be dangerous to use. It’s not clear if it improves sex drive or pleasure during sex either. It is illegal for women to buy Sildenafil in the UK 

If you or your partner are female and having sexual problems, see the NHS’s page on female sexual problems.

See our Viagra (Sildenafil) for Women page for more information.

Sildenafil is an effective treatment, but it doesn’t work for everyone:

  • On average, patients who used Superdrug Online Doctor to order Sildenafil treatment rate it 4.6 out of 5 stars on Trustpilot.com

Sildenafil vs Viagra

Sildenafil vs Viagra
Pack of 4 Teva 50mg Sildenafil film-coated oral tablets
pack of 4 viagra 50mg tablets
Our lowest price £15.00 £19.99
Our lowest price per pill £2.79 £3.21
 Effective for... 74% of users 74% of users
Our Trustpilot rating 4.6 out of 5 4.6 out of 5
Drugs.com rating 8.2 8.5
Can you buy it online? Yes Yes
Over the counter version Viagra Connect Viagra Connect
Available on the NHS? Yes Only for some people
Available dosages  25mg, 50mg, 100mg 25mg, 50mg, 100mg
How fast do they work? 30 to 60 mins 30 to 60 mins
How long do they last?  4 to 6 hours 4 to 6 hours

  • Pfizer patented Sildenafil after it was created, selling it exclusively under the brand name Viagra
  • This patent expired in 2013 and since then other manufacturers have been able to make and sell generic Sildenafil
  • Sildenafil is a generic medication so it can be manufactured by anyone, but Viagra is a Pfizer brand, so only they can make it
  • In 2017 Pfizer patented the first over-the-counter form of Sildenafil – Viagra Connect

If you’re not sure which to choose, remember they both have the same active ingredient and both are safe as long as a doctor approves treatment for you. We don’t recommend one over the other.

See our page on the differences between Viagra Connect, Viagra, and Sildenafil for more information.

Sildenafil vs Tadalafil

Sildenafil vs Tadalafil
Pack of 4 Teva 50mg Sildenafil film-coated oral tablets
Our lowest price £15.00 £30.00
Our lowest price per pill £2.79 £1.96
 Effective for... 74% of users 60-70% of users
Our Trustpilot rating 4.6 out of 5 4.3 out of 5
Drugs.com rating 8.2 8.5
Over the counter version Viagra Connect No
Daily dosage? No Yes
Available dosages  25mg, 50mg, 100mg 2.5mg, 5mg, 10mg, 20mg
How fast do they work? 30 to 60 mins 30 mins*
How long do they last?  4 to 6 hours Up to 36 hours*

* these time apply to 10mg or 20mg doses you take before sex – the 2.5mg and 5mg daily doses are always working

If you need help choosing:

  • Both are about as effective as each other – even though Sildenafil has higher dosage numbers, that doesn’t mean it’s stronger overall
  • If you want a longer-lasting medication, you might want to choose Tadalafil or Tadalafil Daily
  • If you don’t want to have to plan to take your medication before sex, you might want to choose Tadalafil Daily

Since sildenafil and tadalafil are the active ingredients in Viagra and Cialis, you can see our Viagra vs Cialis vs Levitra page for more information.

Not sure if Sildenafil is right for you?

There are a lot of different ways to treat erectile dysfunction. You may find these other pages useful:

Sildenafil can cause some side effects and it may react with other medication you’re taking. For full safety information, please read the patient information leaflet that comes with your medication. 

Side effects of Sildenafil

Less than 2% of people appear to get side effects when taking Sildenafil. If you do get side effects they are likely to be mild. If you think you’re having Sildenafil side effects, talk to your doctor. See our Viagra (Sildenafil) Side Effects page for more information.

Common side effects:

  • headache
  • nausea
  • indigestion
  • blocked nose
  • facial flushing
  • hot flushes
  • eyes problems, such as blurred vision
  • dizziness

Uncommon side effects:

  • vomiting
  • skin rash
  • eyes irritation/pain
  • bloodshot eyes
  • seeing flashes of light
  • visual brightness
  • sensitivity to light
  • rapid heartbeat
  • muscle pain
  • feeling sleepy or tired
  • blocked sinuses
  • upper abdominal pain
  • feeling hot
  • nosebleeds
  • arm or leg pain
  • blood in urine
  • watery eyes
  • Rare side effects:
  • irregular heartbeat
  • heart attack
  • stroke
  • fainting
  • numb mouth
  • temporary reduced blood flow to brain
  • tightening in the throat
  • double vision
  • swelling of the eye or eyelid
  • abnormal sensations in the eye
  • spots in your vision
  • dilated pupils
  • discolouring of the whites of the eyes
  • bleeding from the penis
  • blood in semen
  • dry nose
  • irritability
  • swelling on the inside of the nose
  • sudden loss of hearing

Serious side effects:

If you experience the following, you should stop taking Sildenafil and seek medical help immediately:

  • allergic reaction – symptoms include breathing difficulties, dizziness, swelling of face, lips, or tongue 
  • chest pains

Drug interactions

The following drugs can interact with Sildenafil. You should make sure you tell your doctor if you are taking any of the following:

  • nitrates
  • nitric oxide donors (“poppers”)
  • protease inhibitors (used to treat HIV)
  • alpha-blocker therapy
  • riociguat used for pulmonary hypertension

Herbal or complementary remedies could also interfere with Sildenafil and potentially cause side effects. If you are taking any herbal remedies, you should speak to your doctor to make sure there isn’t a risk of interaction.

Pre-existing conditions

Sildenafil is not suitable for some men who have certain medical conditions. For example, you may not be suitable for Sildenafil treatment if you have:

  • a serious heart or liver problem
  • take nitrates for a chest pain
  • recently had a stroke or a heart attack
  • low blood pressure
  • a rare inherited eye disease
  • You should also let your doctor know if you have:
  • sickle cell anaemia
  • Peyronie’s disease or a penis deformity
  • a heart problem
  • a stomach ulcer
  • a bleeding problem like haemophilia

Erectile Dysfunction. (2019) NICE [Accessed 02nd September 2020]

ED Changes. (2020) BAUS [Accessed 02nd September 2020]

Generic Drugs. (2016) JAMA [Accessed 02nd September]

Medicines Information. (2019) NHS [Accessed 02nd September 2020]

Sildenafil Dosage. (2018) Drugs.com [Accessed 02nd September 2020]

Sildenafil Effectiveness. (1999) Drugs [Accessed 02nd September 2020]

Sildenafil Interactions. (2020) NICE [Accessed 02nd September 2020]

Sildenafil Patient Leaflet. (2019) Accord [Accessed 02nd September 2020]

Sildenafil. (2019) NHS [Accessed 02nd September]

About Online Doctor

We're a service that helps you order treatments online from UK-registered doctors with free, discreet, to-your-door deliveries.

See our About Us page to learn more.
Customer reviews
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4.6 Excellent

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    by , 18th Feb 2021
    good service

  • 5
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    by , 13th Feb 2021
    Sorted me right out

  • 5
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    by , 12th Feb 2021
    Great product but a bit pricey

  • 5
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    by , 10th Feb 2021
    Excellent fast service and trustworthy

  • 5
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    by , 9th Feb 2021
    Product as requested

  • 5
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    by , 9th Feb 2021
    Good service quick delivery

  • 5
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    by , 8th Feb 2021
    Always easy to order & a speedy delivery

  • 5
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    by , 8th Feb 2021
    Thank you very much for help, everything was ok :)

  • 5
    5
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    by , 8th Feb 2021
    Excellent and timely service and delivery.

  • 5
    5
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    by , 5th Feb 2021
    Fast efficient service. Always reliable.

  • 5
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    by , 5th Feb 2021
    Very good product, but the price is still high.

  • 5
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    by , 2nd Feb 2021
    Great service!!!!

  • 5
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    by , 30th Jan 2021
    Very good service, product always arrives on time.

  • 5
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    by , 27th Jan 2021
    very good with the product.

  • 5
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    by , 24th Jan 2021
    Excellent service. Fast free delivery.

  • 5
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    by , 22nd Jan 2021
    Great service, product delivered promptly and it does the job me!!!

  • 5
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    by , 18th Jan 2021
    Very speedy service

  • 5
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    5
    by , 18th Jan 2021
    Really good company to deal with - straightforward methods and checks

  • 5
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    by , 14th Jan 2021
    Rubbish. Hermes delivered a tyre gauge!

  • 5
    5
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    by , 12th Jan 2021
    Not being able to even see my gp at the moment makes this service invaluable.

  • 5
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    5
    by , 12th Jan 2021
    Reasonable price, good quality, fast delivery and easy order process, very satisfied

  • 5
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    5
    by , 11th Jan 2021
    Done what it said on the box

  • 5
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    by , 11th Jan 2021
    Very good efficient service.

  • 5
    5
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    by , 10th Jan 2021
    Does the job

  • 5
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    by , 8th Jan 2021
    they seem to work Ok and arrive in a quick time frame Good.

  • 5
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    by , 7th Jan 2021
    Very happy with the service and products I receive

  • 5
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    by , 6th Jan 2021
    I was amazed at how quickly the order was processed and delivered. Product has worked well.

  • 5
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    by , 3rd Jan 2021
    Great service

  • 5
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    by , 1st Jan 2021
    I have still to receive the delivery .I have contacted Superdrug online and the courier Hermes but no one has responded at all .Poor Show

  • 5
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    by , 1st Jan 2021
    I am a 60 few year old male and can again perform as I did in my 20s, this product has allowed my wife and I to have many hours of pleasure and satisfaction. Happy wife happy life. Thankyou Viagra

  • 5
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    by , 31st Dec 2020
    Very helpful

  • 5
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    by , 30th Dec 2020
    Order went very well easy to go through the questions and quick delivery

  • 5
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    by , 29th Dec 2020
    Good service. Shame that you stopped using Royal Mail who were always the quickest and guaranteed delivery which happened on time -always. The courier service - via any courier is not good.

  • 5
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    by , 28th Dec 2020
    Does job well

  • 5
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    by , 27th Dec 2020
    Service very good.

  • 5
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    by , 26th Dec 2020
    Very quick to get here

  • 5
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    by , 26th Dec 2020
    Does what it says on the tin

  • 5
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    by , 23rd Dec 2020
    Product brilliant. The service less so. When I went to collect at named pharmacy, a few hours after at the appointed time for collection, it was not ready for collection, it took 30 minutes to pick and get ready. Waste of my time and effort. What is the point of having a time slot firselection which is not deliverable. It sours the mouth. Pointless.

  • 5
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    by , 21st Dec 2020
    Brilliant.

  • 5
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    by , 21st Dec 2020
    Not as affective as I’d hoped.

  • 5
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    by , 21st Dec 2020
    Arrived very fast

  • 5
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    by , 21st Dec 2020
    Very happy with them

  • 5
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    by , 20th Dec 2020
    Brlliant product, has transformed my life. The service I get is brillant, evey time I need them. Thankyou David Hitch

  • 5
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    by , 19th Dec 2020
    The wife has never been happier

  • 5
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    by , 17th Dec 2020
    Ordered product viagra from Lloyds pharmacy good customer service and product ordered worked well with no side effects.

  • 5
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    by , 17th Dec 2020
    Product was very effective

  • 5
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    by , 13th Dec 2020
    Its been satisfactory so far.

  • 5
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    by , 12th Dec 2020
    Great service, good drugs but grossly over priced

  • 5
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    by , 10th Dec 2020
    It does what it says on the box!

  • 5
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    by , 8th Dec 2020
    Good product, could be cheaper, but happy with price

  • 5
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    by , 7th Dec 2020
    The product does work extremely well but could be more reasonabley priced

  • 5
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    by , 6th Dec 2020
    Ordered 8 days ago and still not arrived.

  • 5
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    by , 4th Dec 2020
    Easy app to use and fast dalivery

  • 5
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    by , 4th Dec 2020
    Good reliable service.

  • 5
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    by , 4th Dec 2020
    Excellent service, swiftly delivery

  • 5
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    by , 2nd Dec 2020
    It’s easy convenient and your privacy.

  • 5
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    by , 1st Dec 2020
    Everything was fine

  • 5
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    by , 28th Nov 2020
    Happy wife now. Shouldve got these years ago.

  • 5
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    by , 28th Nov 2020
    Ok goooood

  • 5
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    by , 27th Nov 2020
    Very good product. Very happy.

  • 5
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    by , 26th Nov 2020
    Does what it says on the packet

  • 5
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    by , 24th Nov 2020
    Excellent service easy to deal always helpful if advice required

  • 5
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    by , 19th Nov 2020
    Excellent and extremely good value.

  • 5
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    by , 16th Nov 2020
    Discrete and quick service

  • 5
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    by , 16th Nov 2020
    A reliable product, if a bit overpriced

  • 5
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    by , 14th Nov 2020
    Prices need to be more competitive

  • 5
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    by , 14th Nov 2020
    Does exactly what it says on the box.

  • 5
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    by , 11th Nov 2020
    Great service but let down by change of delivery operator from Royal Mail to DX. Never had a problem with Royal Mail but DX were appalling

  • 5
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    by , 10th Nov 2020
    Lovely stuff good for work

  • 5
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    by , 6th Nov 2020
    Great stuff!

  • 5
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    by , 6th Nov 2020
    Excellent product backed up by first class ordering and delivery

  • 5
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    by , 6th Nov 2020
    Quick delivery and very effective

  • 5
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    by , 5th Nov 2020
    Does what it sez on the tin.

  • 5
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    by , 5th Nov 2020
    I haven't received it yet. It's still in the post . Very upset

  • 5
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    by , 4th Nov 2020
    Does the the job which it was brought

  • 5
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    by , 4th Nov 2020
    Good company , good service.

  • 5
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    by , 3rd Nov 2020
    Great service always delivered on time ,great online service

  • 5
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    by , 30th Oct 2020
    You simply order and the stuff arrives.. what's not to like. They keep you advised throughout the process so there's no need to contact them. Good service.

  • 5
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    by , 28th Oct 2020
    Great product discreet service.

  • 5
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    by , 28th Oct 2020
    Very happy with product

  • 5
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    by , 28th Oct 2020
    Good tablets Viagra with a fast service through post an reliable

  • 5
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    by , 25th Oct 2020
    Very happy with my order and very happy with the online doctors they are very helpful thank-you

  • 5
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    by , 23rd Oct 2020
    Effective efficient product

  • 5
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    by , 21st Oct 2020
    Good service, easy to order ,delivered in 48 hours

  • 5
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    by , 17th Oct 2020
    Fast reliable service. Discreet and trusted

  • 5
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    by , 16th Oct 2020
    Service, delivery and product was spot on

  • 5
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    by , 16th Oct 2020
    Tablet is slightly expensive but it completely resolved my problem so not even thinking of the price. Confidentiality purposes so I can’t load pictures

  • 5
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    by , 13th Oct 2020
    Arrived quickly and efficiently no fuss!

  • 5
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    by , 9th Oct 2020
    Very good service

  • 5
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    by , 5th Oct 2020
    Very helpful and speedy delivery. Thankyou

  • 5
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    by , 3rd Oct 2020
    Great product great company fast delivery

  • 5
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    by , 2nd Oct 2020
    Great Thanks

  • 5
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    by , 2nd Oct 2020
    Great and fast

  • 5
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    by , 28th Sep 2020
    Good product does the job.

  • 5
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    by , 27th Sep 2020
    Easy to use service and quick delivery

  • 5
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    by , 22nd Sep 2020
    Very happy with the service

  • 5
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    by , 21st Sep 2020
    Very easy process. Delivery was quick.

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