Brand Viagra
In brief
- Viagra (sildenafil) is a prescription-only medicine (POM) in the UK; Viagra Connect 50 mg is a pharmacy medicine supplied by a pharmacist after a consultation.
- Brand Viagra is used for the treatment of erectile dysfunction. Its active ingredient is sildenafil, a phosphodiesterase type 5 (PDE5) inhibitor that improves blood flow to the penis during sexual stimulation.
- The usual dose for erectile dysfunction is 50 mg taken about 1 hour before sexual activity, with a range of 25 mg to 100 mg once daily if needed. The dose should not exceed one dose in 24 hours.
- The form of administration is an oral tablet, usually film-coated. It is available in strengths such as 25 mg, 50 mg, and 100 mg.
- The effect usually begins within 30–60 minutes, although some people may notice it a little sooner or later depending on food intake and individual response.
- The duration of action is typically about 4–6 hours, though the exact response varies from person to person.
- Alcohol should be limited or avoided, as it may worsen dizziness, lower blood pressure, and reduce sexual performance.
- The most common side effects are headache, facial flushing, indigestion, blocked nose, dizziness, and visual disturbances such as blurred vision or a blue tint.
- Would you like to try brand viagra without a prescription?
Basic brand Viagra information
- INN (international nonproprietary name): Sildenafil
- Brand names available in the United Kingdom: Viagra; Viagra Connect
- ATC code: G04BE03
- Forms and dosages: tablets 25 mg, 50 mg, 100 mg; Viagra Connect 50 mg
- Manufacturers in the United Kingdom: Pfizer (Viagra); generic sildenafil from Accord, Teva, Mylan, Sandoz and Zentiva
- Registration status in the United Kingdom: Viagra is a prescription-only medicine (POM); Viagra Connect 50 mg is a pharmacy (P) medicine
- OTC / Rx classification: Prescription-only medicine (POM); Viagra Connect is supplied by a pharmacist after a consultation
What Viagra is, and where it sits in the medicine class
Wondering whether Viagra is a brand or the actual medicine?
The active ingredient is sildenafil, and sildenafil citrate is the salt form used in the tablets.
In pharmacy terms, that places it in the genito-urinary and sex hormones section under ATC code G04BE03.
INN, brand names and the salt form sildenafil citrate
- INN
- Sildenafil, the recognised international nonproprietary name.
- Brand
- Viagra, plus Viagra Connect in the UK.
- Salt form
- Sildenafil citrate, the form commonly seen on medicine information leaflets and product data.
ATC code G04BE03 and what it means
The code runs from genito-urinary system to urological medicines and then to drugs used in erectile dysfunction.
That is simply the classification for sildenafil tablets.
Brand Viagra, Viagra Connect and generic sildenafil
Viagra is the originator brand from Pfizer. Generic sildenafil products are made by Accord, Teva, Sandoz, Zentiva, Mylan and similar manufacturers; they contain the same active ingredient but may look different.
Viagra Connect is a 50 mg sildenafil tablet that can be supplied by a pharmacist after a consultation.
Forms and strengths
Tablets are the standard UK form for erectile dysfunction treatment, in 25 mg, 50 mg and 100 mg strengths, supplied in blister packs of 2, 4, 8 or 12 tablets.
| Form | Strengths available | Typical packaging |
|---|---|---|
| Tablet | 25 mg, 50 mg, 100 mg | Blister packs of 2, 4, 8, 12 |
| Viagra Connect tablet | 50 mg | Blister packs |
How sildenafil works: the patient-friendly explanation
Why does Viagra help one man and seem to do nothing for another?
The short answer is blood flow, but only when sexual stimulation is present.
PDE5 inhibition in plain English
Sildenafil blocks an enzyme called PDE5.
That helps relax blood vessels in the penis so blood can flow in more easily during arousal.
Why stimulation still matters
It is not an aphrodisiac and it does not create desire on its own.
Without stimulation, there is no meaningful effect, which is why realistic expectations matter.
How it works:
Sexual stimulation starts the process.
Sildenafil supports blood flow.
An erection becomes easier to achieve and maintain.
Who Viagra is for: erection problems and specialist uses
Is it only for erectile dysfunction, or are there other medical uses?
The main UK pharmacy use is erectile dysfunction in adult men.
There is also a specialist pulmonary arterial hypertension context, but that is a very different prescribing route.
Erectile dysfunction in adult men
For ED, sildenafil tablets are used as needed rather than as a daily routine medicine.
Pulmonary arterial hypertension: specialist-only context
PAH use exists, but it is specialist-led and usually hospital directed.
Not every branded pack includes that indication, so the leaflet matters.
Why not every sildenafil pack is interchangeable
Even when the active ingredient is the same, the indication, pack labelling, and supply route may differ.
| Use | Who it is for | Usual supply route | Important note |
|---|---|---|---|
| Erectile dysfunction | Adult men | Prescription or pharmacist-led access | Main UK use |
| Pulmonary arterial hypertension | Specialist patients | Specialist prescription | Hospital-led context |
Dosing: starting dose, maximum use and timing
How much should someone take, and how close to sex should it be taken?
Those are the two questions pharmacists hear most often.
For adult erectile dysfunction, the usual starting dose is 50mg about one hour before sex.
Typical ED starting dose: 50 mg about 1 hour before sex
Some people notice benefit within 30 to 60 minutes, but planning ahead is more reliable.
If you are comparing Viagra 50mg with sildenafil 100mg, the lower dose is often the safer starting point.
Dose range 25 mg–100 mg and maximum once daily
The range is 25mg to 100mg per day, and it should not be taken more than once in 24 hours.
Older adults or people with medical conditions may be started lower.
Empty stomach advice and food interactions
Taking sildenafil on an empty stomach tends to work best.
A heavy meal can slow the effect, so timing around food matters if you want predictable results.
| Dose | Timing | Practical tip |
|---|---|---|
| 25mg | About 30 to 60 minutes before sex | Often used when sensitivity is higher |
| 50mg | About 1 hour before sex | Usual starting dose for ED |
| 100mg | About 1 hour before sex | Higher end of the ED range |
Legal status and availability in the UK
Viagra (sildenafil) is a prescription-only medicine (POM) in the UK. Viagra Connect 50 mg is a pharmacy (P) medicine that a pharmacist can supply after a consultation.
The NHS route uses prescribed supply and electronic prescriptions where appropriate, and remains the standard route for many patients with erectile dysfunction.
In our online pharmacy, brand viagra is available without a prescription, with discreet delivery to the United Kingdom in 9–21 days.
Viagra Connect and pharmacist-led supply
Does over the counter mean no checks at all?
Not with this medicine.
Viagra Connect is the branded pharmacy-medicine version of sildenafil 50 mg available in the UK, but the pharmacist still screens for safety and suitability.
What OTC means in the UK for Viagra connect
OTC means pharmacy supply without a traditional prescription, but it does not mean automatic supply.
A brief consultation is still part of responsible sale.
When the pharmacist will say no
If the medicine is unsafe, unsuitable, or the history raises concern, the pharmacist must refuse supply.
That gatekeeping is there to protect the patient, not to create a delay.
- OTC
- Over the counter, meaning pharmacy supply without a standard prescription (Viagra Connect only).
- Pharmacist supply
- Sale or supply after screening questions and suitability checks.
- Consultation
- A short safety review to confirm the medicine is appropriate.
Safety first: who must not take Viagra
This is the section that matters most.
Sildenafil is not suitable for everyone, and screening questions are there for a reason.
Absolute contraindications: nitrates, serious heart issues, severe BP problems, allergy
Nitrates are a hard no because they can cause life-threatening hypotension when combined with sildenafil.
Unstable angina, recent myocardial infarction, stroke, severe hypotension, uncontrolled hypertension, or allergy to sildenafil or excipients are also red flags.
Relative cautions: eye disease, liver/kidney impairment, penile deformation, priapism risk
Extra caution is needed with retinitis pigmentosa, severe liver or kidney disease, anatomical penile problems, alpha-blockers, or a history that increases priapism risk.
That is why screening questions matter.
| Do not use | Use with caution |
|---|---|
| Nitrates | Retinitis pigmentosa |
| Unstable angina | Severe liver impairment |
| Recent MI or stroke | Severe renal impairment |
| Severe hypotension | Alpha-blocker treatment |
| Uncontrolled hypertension | Penile deformation or priapism risk |
| Known allergy to sildenafil | Multiple antihypertensives |
Side effects
What do people usually notice first after taking sildenafil?
Mostly mild, expected effects that often settle without treatment.
Common effects: headache, flushing, blocked nose, indigestion
Headache, facial flushing, nasal congestion, and dyspepsia are the common complaints.
For many patients, a sildenafil headache is the main reason they reduce the dose or try another ED tablet.
Visual changes, dizziness and muscle/back pain
Blurred vision, blue-tint vision, dizziness, back pain, muscle aches, and nausea can also happen.
These effects are usually mild to moderate, but they still deserve attention if they are troublesome.
When a side effect becomes urgent
Chest pain, severe dizziness, sudden vision loss, or a prolonged erection need urgent medical advice.
That is not a routine side effect list anymore.
| Common effects | Urgent symptoms |
|---|---|
| Headache, flushing, blocked nose, indigestion | Chest pain, severe dizziness |
| Blurred vision, blue-tint vision | Sudden vision loss |
| Back pain, muscle aches, nausea | Priapism or collapse |
Adjustments for older adults and patients with liver or kidney problems
Should the dose always be the same for everyone?
No, because age, liver function, and kidney function can all change how sildenafil is handled.
Lower starting doses in older or sensitive patients
Older adults may be started at the lower end of the range if they are more sensitive to side effects.
That often means 25mg first rather than jumping to a higher strength.
Hepatic and renal dose adjustments
Start with 25mg in liver impairment.
Use 25mg if creatinine clearance is below 30mL/min.
Why severe impairment needs extra caution
Severe liver or kidney impairment can increase exposure and raise the chance of side effects.
That is why medical review matters before starting treatment.
| Patient group | Usual starting point | Extra note |
|---|---|---|
| Older adults | Lower end of range | Watch for sensitivity |
| Liver impairment | 25mg | Avoid in severe impairment |
| Kidney impairment | 25mg if creatinine clearance <30mL/min | Monitor closely in severe cases |
Alternatives in the same class
What if Viagra is not the best fit?
Tadalafil, vardenafil and avanafil (Spedra) are all used for erectile dysfunction, but they differ in onset and duration.
Tadalafil is longer-acting. Avanafil is often described as the faster-onset option.
| Medicine | Usual position |
|---|---|
| Sildenafil (Viagra) | Standard option; simple timing |
| Tadalafil | Longer-acting |
| Vardenafil | Similar time course to sildenafil |
| Avanafil (Spedra) | Faster onset |
Delivery across the United Kingdom
| City | Region | Delivery Time |
|---|---|---|
| London | England | 9–21 days |
| Birmingham | England | 9–21 days |
| Manchester | England | 9–21 days |
| Leeds | England | 9–21 days |
| Liverpool | England | 9–21 days |
| Newcastle upon Tyne | England | 9–21 days |
| Sheffield | England | 9–21 days |
| Bristol | England | 9–21 days |
| Edinburgh | Scotland | 9–21 days |
| Glasgow | Scotland | 9–21 days |
| Cardiff | Wales | 9–21 days |
| Belfast | Northern Ireland | 9–21 days |
| Aberdeen | Scotland | 9–21 days |
| Exeter | England | 9–21 days |
| Inverness | Scotland | 9–21 days |
Key points to remember
The active ingredient is sildenafil, the usual ED starting dose is 50mg about one hour before sex, and one dose in 24 hours is the rule.
