Stimulation increases blood flow
When you get aroused, your body produces a molecule called cGMP which helps to stimulate an erection by increasing blood flow to the penis.1
Viagra Connect was the first erectile dysfunction (ED) treatment available in the UK without a prescription. It contains sildenafil, the same active ingredient found in prescription Viagra, which is a medicine that’s been trusted by millions of men worldwide since it first came to market in the late 1990s.
Launched as an over-the-counter option in 2018, Viagra Connect was developed to make ED treatment more accessible and discreet. Instead of needing a GP appointment, it can now be purchased directly following a short consultation or assessment with a pharmacist.
Viagra Connect, which contains sildenafil, typically takes around 30-60 minutes to start working and lasts for up to 4 hours.1
Stimulation increases blood flow
When you get aroused, your body produces a molecule called cGMP which helps to stimulate an erection by increasing blood flow to the penis.1
Restricted blood flow inhibits an erection
However, for people experiencing erectile difficulties, an enzyme known as PDE5 normally breaks cGMP down, restricting blood flow and causing the erection to subside.1
Medication promotes a firmer erection
Viagra Connect blocks the action of PDE5, allowing more blood to flow to the penis. The resulting erection is firmer and usually lasts long enough to allow for satisfying sex.1
The difference between Viagra and Viagra Connect is that Viagra is only available via a prescription, whereas Viagra Connect can be bought over the counter without a prescription.
| Feature | Viagra Connect | Viagra |
|---|---|---|
| Active ingredient | Sildenafil citrate | Sildenafil citrate |
| Manufacturer | Pfizer | Pfizer |
| Prescription requirement | No - can be purchased over the counter | Yes |
| Available doses | 50mg | 25mg, 50mg, and 100mg |
| Mechanism of action | Improves blood flow to help achieve and maintain an erection when sexually aroused | Improves blood flow to help achieve and maintain an erection when sexually aroused |
| Duration of effect | Up to 4 hours | Up to 4 hours |
Numan isn’t just here to hand out pills. We’re a holistic health platform built to help you take control, with treatment, guidance, and ongoing support that actually works. When you choose Viagra Connect with Numan, you’re not just getting medication, but complete care designed to help you perform your best.
Blood testing
Complete a Numan Erectile Dysfunction Blood Test to uncover underlying causes such as low testosterone or cardiovascular risk factors, so you can get more effective treatment.
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Hormone health
If hormone issues related to erectile dysfunction are suspected, Numan offers access to a dedicated team who provide personalised treatment, monitoring, and support.
Home delivery
All treatments are shipped quickly for free, in discreet packaging directly to your desired address. And if plans change, so can your delivery, all online.
Real results
With thousands of successful patients behind us, our approach is tried, tested, and trusted.
Viagra Connect has the same side effect profile as both Viagra and generic sildenafil. Some of these side effects can be found in the table below, and for a full list of side effects, please read the Patient Information Leaflet found in each box.2
| Common | Uncommon |
|---|---|
| Headache | Upper abdominal pain |
| Nausea | Acid reflux |
| Indigestion | Skin rash |
| Stuffy nose | Pain in arms or legs |
| Dizziness | Vomiting |
| Changes to vision | Feeling hot |
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Mo Dekmak
Head of Clinical Product
MPharm PgDip IPresc

Dr Dimitris Schizas
Numan Doctor
MBBS MRCGP MSC BSSM

Dr Michael Lacey
Numan Doctor
MBChB BSc (Hons) MRCGP

Dr Alexandra Davidson
Numan Doctor
BSc (Hons) MBBS MRCGP AFHEA MA (Hons) AFMCP

Abby Watts
Senior Nurse Prescriber
BSc Adult Nursing, IP

Smith BP, Babos M. Sildenafil. In: StatPearls. Treasure Island (FL): StatPearls Publishing; 2025.
Viagra Connect 50 mg film-coated tablets. Org.uk. [accessed 27 Oct 2025] Available from: https://www.medicines.org.uk/emc/product/8725/smpc
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