Published On: 9th June, 2026
If you are looking into sildenafil as a treatment for erectile dysfunction (ED), you may have noticed that both Viagra and Viagra Connect are available in the UK. They contain the same active ingredient, but they are not identical products.
Understanding the differences between them can help you make a more informed decision and have a better conversation with a clinician or pharmacist about which option is appropriate for you.
The core difference is how each product is obtained and the level of medical oversight involved. Viagra is a prescription-only medicine. Viagra Connect is available without a prescription from a pharmacy, following a consultation with a pharmacist.
Both contain sildenafil citrate as the active ingredient. However, the available doses, access routes, and suitability criteria differ in important ways.
| Feature | Viagra (Prescription) | Viagra Connect (OTC) |
|---|---|---|
| Active ingredient | Sildenafil citrate | Sildenafil citrate |
| Available dose | 25mg, 50mg, 100mg | 50mg only |
| How to obtain | Prescription required | Pharmacy without prescription |
| Medical assessment | Full clinical consultation | Pharmacist screening |
| Dose flexibility | Yes, tailored to patient | Fixed at 50mg |
| Suitable for complex health needs | Assessed individually | More restricted criteria |
Both Viagra and Viagra Connect work in exactly the same way. Sildenafil is a PDE5 inhibitor that increases blood flow to the penis during sexual stimulation, supporting the ability to achieve and maintain an erection.
Neither product works without sexual arousal. Timing, alcohol intake, and meal composition can all influence how well either treatment performs in practice.
Viagra Connect is only available at 50mg. This is the standard starting dose for many patients, but it is not appropriate for everyone.
Prescription Viagra can be tailored. A clinician may prescribe a lower 25mg dose for patients who are more sensitive to the medication or taking certain other medicines, or a higher 100mg dose if 50mg proves insufficient. That flexibility is only available through a prescription route, which is one reason a clinical consultation adds value beyond simply obtaining the medicine.
Viagra Connect is intended for adult men aged 18 and over who have previously been diagnosed with ED by a doctor. A pharmacist will screen suitability before supplying it.
It is not appropriate for all patients. Those with cardiovascular conditions, men taking nitrate medicines, or those with other complicating health factors may be directed toward a prescription route instead. The pharmacist screening, while useful, is not a substitute for a full medical consultation.
A prescription consultation is worth considering if:
ED can sometimes be an early indicator of cardiovascular or other health concerns. A proper clinical consultation provides the opportunity to explore that wider picture rather than simply treating the symptom.
Both contain sildenafil citrate and work in the same way. The differences are in how they are obtained, the doses available, and the level of medical oversight involved.
No. At the same dose, the clinical effect is identical. The difference lies in dose flexibility and the breadth of medical assessment, not in the medicine itself.
Yes, from a registered pharmacy following a consultation with the pharmacist. However, a doctor or prescriber assessment is recommended if you have not previously been diagnosed with ED or have other health conditions.
Viagra Connect is available in a single dose of 50mg only. Prescription sildenafil is available in 25mg, 50mg, and 100mg doses.
If Viagra Connect has not been effective, it is worth speaking to a clinician. The dose may need adjusting, or there may be underlying factors affecting your response that warrant further assessment.
Yes. Because both products contain sildenafil, the side effect profile is the same. Common effects include headache, flushing, indigestion, nasal congestion, and dizziness. Any persistent or concerning symptoms should be discussed with a healthcare professional.
Yes. Prescription sildenafil can be obtained through a regulated online consultation with a qualified prescriber, such as the service available through RX Direct.
Both Viagra and Viagra Connect can be appropriate options depending on your circumstances. If you are in good general health, have a previous ED diagnosis, and are happy with a 50mg dose, Viagra Connect may be a convenient starting point.
However, if you want a tailored dose, have not been formally assessed, or have other health conditions, a prescription consultation provides a more thorough and appropriate route to treatment.
At RX Direct, our qualified clinicians can assess your suitability and help identify the most appropriate treatment for your individual needs. You can also review our prescription Viagra options or read more about erectile dysfunction treatments available through RX Direct.
Start your consultation today.
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