Order Sildenafil Online
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.
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.
Fully trusted and UK-regulated
✔ Regulated by the CQC
✔ GPhC-registered pharmacies
✔ Approved by the MHRA
Can I buy Sildenafil online?
Sildenafil is a prescription-only medication. Online doctor services that can prescribe it, like Superdrug Online Doctor, are the only safe and legal option if you want to buy Sildenafil online. Any online pharmacy which is prepared to sell it 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?
As Sildenafil is a prescription-only medication, 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 |
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
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
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:
- Sildenafil works for 74% of men who try it
- Sildenafil has a rating of 8.2 out of 10 for erectile dysfunction treatment according to user reviews on drugs.com
- 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 | ||
| 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 | ||
| 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.
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A reliable product, if a bit overpriced
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Prices need to be more competitive
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Does exactly what it says on the box.
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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
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Lovely stuff good for work
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Great stuff!
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Excellent product backed up by first class ordering and delivery
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Quick delivery and very effective
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Does what it sez on the tin.
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I haven't received it yet. It's still in the post . Very upset
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Does the the job which it was brought
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Good company , good service.
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Great service always delivered on time ,great online service
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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.
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Great product discreet service.
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Very happy with product
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Good tablets Viagra with a fast service through post an reliable
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Very happy with my order and very happy with the online doctors they are very helpful thank-you
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Effective efficient product
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Good service, easy to order ,delivered in 48 hours
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Fast reliable service. Discreet and trusted
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Service, delivery and product was spot on
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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
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Arrived quickly and efficiently no fuss!
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Very good service
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Very helpful and speedy delivery. Thankyou
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Great product great company fast delivery
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Great Thanks
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Great and fast
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Good product does the job.
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Easy to use service and quick delivery
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Very happy with the service
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Very easy process. Delivery was quick.
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Service good, website helpful, price a little high!!
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Very good service at a competitive price
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Good good thanks
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Very smooth process altogether
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Very efficient service and good product
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Does what it says it will.
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Very helpful and advice full
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Very good service. A promo discount code would be nice once in a while though.
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Very good product. And good service.
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Easy user friendly site do recommend to others
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This product as same effect as the viagra connect are even better but much cheaper
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Did exactly what it claimed
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Very good service
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Does exactly as described on the box.
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Works in 30 minutes - Blue haze is slight and not a problem.
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Service always available. Medicines usually available for collection by next day. Collection process is easy and discreet.
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Does what it says on the tin
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Absolutely lovely staff
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Superdrug online is discrete, secure and reliable and the order process is extremely quick and easy. Very satisfied.
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Very good, quick service.
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it's satisfactory
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No issues and delivered on time.
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Works well
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Excellent service and product
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Excellent Service!
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It does the job
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The price went up from what it use to be so that was a bit of a surprise to be honest.
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Well known product supplied at a competitive price and very quickly
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No problems whats so ever. excellent service.
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Does what it says on the tin. Delivery spot-on
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Straight forward no hassle service
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The product has no noticeable side effects and it works as expected.
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Fantastic service
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Does what it says on the tin if you know what I mean
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Excellent results. Makes it a very pleasurable experience. Thank you.
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Quick, user friendly and discreet service.
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Great service
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The company save money by dealing with less urgent matters on line so local GPS can concentrate on those that are needing diagnosis and emergency interventions. I have found them to be thorough and accurate on prognosis and treatment.They help me fulfill a certain aspects of my treatment in a non obtrusive manner. They always deliver what you need, when you need it!
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Excellent service, great product.
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gd service never had a problem and would say to friend's to use aswell thank you
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Excellent service
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Super product from Superdrug. Effective product delivering upstanding results.
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Worked exactly as expected
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The product is good and the service from superdrug is excellent.
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This product did not work for me and taken it as instructed
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Happy with the care and speed of Superdrug online
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Good value rapid delivery of goods
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Good value for money and efficient application
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Excellent
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Great product for me. However, could do with more discounts for regular customers like me.
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Does exactly what you would need it to
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Quick, professional and discreet. Excellent
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Worked for me.
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product never arrived, money wasted trying to claim it back is a ball ache
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Nice product
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Quick and easy to use service.
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Great, quick and affordable service
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Very good all round.
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Great service
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A bit expensive for. Hoping they can lower the price
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Very pleased with the service and product
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no problem with the delivery
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Excellent product, does just what it promises. Having qualified doctor backup gives confidence in Superdrug as the supplier
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Helps me every time