Home | Erectile Dysfunction Tablets | Sildenafil
Sildenafil
(Generic version of Viagra)
Sildenafil contains the same active ingredient as Viagra and is available at a lower price. It’s medically proven to establish a reliable flood of blood to the penis, ensuring a strong erection when you need it.
- Takes effect in 1 hour
- Lasts up to 4 hours
Strength
✓ IN STOCK
25MG
50MG
100MG
Quantity of tablets
4
£2.40/tablet
8
£2.30/tablet
12
£2.20/tablet
16
£2.10/tablet
Shipment frequency
Every Month
Regular price
Every 3 Months
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*Prescription included if approved
Licensed Pharmacy & UK-licensed Doctors
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Overview
How much does sildenafil cost?
Pack size | 25MG | 50MG | 100MG |
---|---|---|---|
4 tablets | £2.30 | £2.40 | £3.20 |
8 tablets | £2.20 (SAVE 4%) | £2.30 (SAVE 4%) | £3.00 (SAVE 6%) |
12 tablets | £2.10 (SAVE 9%) | £2.20 (SAVE 8%) | £2.70 (SAVE 16%) |
16 tablets | £2.00 (SAVE 13%) | £2.10 (SAVE 13%) | £2.60 (SAVE 19%) |
What is sildenafil?
You may know it as the brand name ‘Viagra’, but the active ingredient is sildenafil which works in the same way to quickly improve your ability to get and maintain an erection. Sildenafil is just as effective as the branded version and it is MHRA approved to treat ED. It doesn’t matter if you experience erectile dysfunction in your twenties or when you are over 40, it’s hard work made easy.
How does sildenafil work?
Sildenafil works by improving blood flow to the penis to help men get and maintain an erection. Taking sildenafil will not cause an erection, you will need to be aroused for the drug to work.
How to take sildenafil
Take 1 tablet whole with a little water about an hour before sex. Sildenafil can be taken with or without food. If you take Sildenafil on a full stomach or after eating a fatty meal, the medication may take longer to start working.
How long does sildenafil last?
Sildenafil is formulated to last up to four hours – but typically, most men say they experience the effects for about two to three hours.
Ingredients
The active substance is sildenafil. Each tablet contains 25 mg, 50 mg or 100 mg of sildenafil (as the citrate salt). Tablet core: microcrystalline cellulose, calcium hydrogen phosphate (anhydrous), croscarmellose sodium, magnesium stearate. Film coat: hypromellose, titanium dioxide (E171), lactose monohydrate, triacetin, indigo carmine aluminium lake (E132).
FAQ
It usually takes about 30 to 60 minutes for sildenafil to work. You can take it up to four hours before you want to have sex.
The usual starting dose for men is 50mg. Sildenafil is available in 25mg, 50mg and 100mg strength tablets. Our licensed doctors will determine the correct dosage for you.
Drinking alcohol with sildenafil can reduce your ability to get and maintain an erection. Alcohol can also make it more likely that you will experience certain side effects including dizziness and headaches. It is therefore best not to drink alcohol before taking sildenafil.
You should not take more than one tablet a day. Taking more than 1 tablet will increase the risk of side effects and possibly their severity.
Do not take the product with grapefruits or grapefruit juice as this can increase the levels of the drug in your body and may affect how the medicine works.
The most commonly reported side effects of sildenafil include:
- headaches
- nausea
- a sudden feeling of heat in your upper body
- indigestion
- visual disturbances
- dizziness
- a stuffy nose
they are usually mild and don’t last for long. If you experience any side effects or an increase in the severity of a side effect, you should stop taking the medication.
Both medicines have the same active ingredient known as sildenafil citrate and will have the same effect. The main difference between sildenafil and Viagra is pricing. Viagra is the original product and the brand name for Pfizer’s tablet. However, cheaper alternatives are available as generic products are made by a number of different manufacturers. It contains the same active ingredient as the original brand name Viagra, manufactured by Pfizer.
Sildenafil tablets should always be stored in the pouches or in the provided vial and should only be removed when you are taking your next dose. The tablets can be stored in a clean, dry place at room temperature. Do not share your medicine with anyone else. Keep all medicines out of the sight and reach of children.
Sildenafil tablets should never be used past the expiry date which is printed on the pouch after the letters EXP. The expiry date is always the last day of the month shown on the packaging, after which it should be discarded.
Do not flush sildenafil tablets down the toilet or empty them down the drain as this will contaminate water and could affect the environment. We recommend that all medicines be returned to your local pharmacy for disposal.
Yes you can, FROM MARS is a registered UK pharmacy. Get started with our online consultation. Simply enter your medical history and symptoms without the awkward doctor talk. Your order will be reviewed by our doctors and you’ll receive a personal treatment plan and get your sildenafil shipped for free to your door the next day once approved for a prescription (subject to clinical review).
Compare
SILDENAFIL VS VIAGRA
Viagra is a brand name medication discovered and marketed by Pfizer, and sildenafil is the active ingredient in Viagra that treats erectile dysfunction.

Which meds are right for me?
All treatments are medically proven to assist in getting and maintaining an erection – but each one of them are unique in their abilities and effectiveness.
Your consultation with our doctors can ensure you find the right ED meds for your needs.

Side Effects
Is sildenafil safe?
Sildenafil is generally a very safe medicine, however it is not recommended for use by women or children. Sildenafil can have side-effects ranging from minor – like a runny nose or a headache – to more serious. If you experience sudden vision loss, ringing in your ears, dizziness or an erection that lasts longer than four hours, seek medical advice by contacting us or your doctor immediately. We recommend reading the link below to understand all of the potential benefits and risks of the medication.
Serious side effects
Serious side effects may include an erection lasting more than 4 hours, sudden vision loss in one eye or both eyes, and a sudden hearing loss or decrease. If any of these side effects occur, seek medical attention immediately.
Common side effects
Do not take sildenafil if you are already taking nitrates (such as nitroglycerin), street drugs called “poppers” (such as amyl nitrate, amyl nitrite, butyl nitrate), allergic to its ingredients, or guanylate cyclase stimulators (eg. riociguat).
Doctors
OUR MEDICAL TEAM
Your privacy is our priority
Your personal data is safe with us. Pharmacy FROM MARS is a licensed pharmacy registered with the General Pharmaceutical Council (GPhC) and is accredited for the distance selling of medicines by the Medicine and Healthcare Products Regulatory Agency (MHRA). We are also registered with the information commissioner’s office – registration ZA501063. Our online doctor service is regulated by the Care Quality Commission.
Info Leaflets
Before taking Sildenafil or any medication, it is important to read the Patient Information Leaflet.
Other available
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