Sildenafil (Viagra) Tablets

Price range: £9.99 through £18.99

Sildenafil tablets (Viagra) are an effective treatment for erectile dysfunction, helping to increase blood flow and support stronger, longer-lasting erections.

At The Health Dispensary, Sildenafil is supplied following a quick online assessment reviewed by a pharmacist prescriber — with discreet collection from our 24/7 prescription point or delivery to your door (Packaging and branding may differ from image shown).

✔ Works within 30–60 minutes
✔ Lasts up to 4–6 hours
✔ Available in 25mg, 50mg and 100mg strengths
✔ Private, confidential service

Start your assessment or add your treatment below.

Looking to buy Sildenafil tablets safely in the UK? Complete a quick online assessment and get discreet treatment reviewed by a pharmacist prescriber.

Sildenafil tablets (Viagra) are a trusted and widely used treatment for erectile dysfunction (ED) in adult men across the UK.

If you’re struggling to achieve or maintain an erection, Sildenafil can help improve blood flow and support a stronger, more reliable response when sexually stimulated.

Sildenafil belongs to a group of medicines called PDE5 inhibitors. It works by enhancing the natural process of erection, helping you respond more effectively when aroused.

Sildenafil is available in 25mg, 50mg, and 100mg strengths, including both branded (Viagra) and more affordable generic versions.

How Sildenafil Works

Sildenafil works by blocking the enzyme phosphodiesterase type 5 (PDE5). As a result, levels of cGMP increase, allowing the blood vessels in the penis to relax and widen.

This improved blood flow helps you achieve and maintain an erection when sexually stimulated.

Starts working in 30–60 minutes
Effects can last up to 4–6 hours
Requires sexual stimulation to work

Why Choose Sildenafil Tablets

Sildenafil tablets remain one of the most effective and well-researched treatments for erectile dysfunction.

Many men choose Sildenafil because it:

Has a strong track record for safety and effectiveness
Offers flexible dosing (25mg, 50mg, 100mg)
Is available as a more affordable generic alternative to Viagra
Can be supplied by a pharmacist following a short online assessment

As a result, Sildenafil is often the first-line treatment for ED in the UK.

Important Information

Sildenafil is not suitable for everyone, so a clinical assessment is required before supply.

Do not take more than one dose in 24 hours
Avoid use if you take nitrate medications
Use with caution if you have heart conditions or low blood pressure
Not suitable for women or those under 18

Always follow the advice of your pharmacist or prescriber.

If you experience severe side effects, stop taking Sildenafil and seek medical attention.

Store below 25°C in the original packaging.

Directions

Note: Always follow your doctor’s or pharmacist’s instructions.
- Dosage and Frequency: Typically one tablet taken 30–60 minutes before sexual activity.
- Application: Swallow whole with water. Do not take more than once per day.
- Safety Reminders:
  - Avoid use with nitrates or alpha-blockers
  - Don’t take with large meals or heavy alcohol
  - Sexual stimulation is required for effectiveness
Storage:
- Store below 25°C
- Keep out of reach of children
- Do not use after expiry date

Ingredients

Active Ingredient (per tablet):
- Sildenafil citrate equivalent to 25mg, 50mg, or 100mg Sildenafil
Key Excipients:
- Microcrystalline cellulose
- Magnesium stearate
- Lactose monohydrate

Side Effects

Common side effects:

Headache
Flushing
Nasal congestion
Indigestion
Dizziness

Serious side effects (rare):

Chest pain
Sudden vision or hearing loss
Prolonged erection over 4 hours (priapism)

Seek urgent medical attention if serious symptoms occur.

Warnings

- Contraindications:
  - Nitrate medications
  - Severe cardiovascular conditions
  - Low blood pressure
  - Known allergies to sildenafil
- Pregnancy/Breastfeeding:
  - Not for use in women
- Drug Interactions:
  - Avoid with certain antifungals, HIV medicines, and blood pressure drugs
- Age Restrictions:
  - Only for adult men aged 18+

Sildenafil usually takes between 30 minutes to 1 hour to start working. However, it won’t cause an erection on its own—you still need to be sexually aroused for it to be effective. Its effects can last for up to 4 hours.
You can drink a small amount of alcohol, but it’s best to limit how much you have. Drinking too much can make it harder to get or keep an erection and may also increase the risk of side effects like dizziness or low blood pressure.
Yes, you can take it with or without food. But if you’ve had a large or high-fat meal, it might take longer to start working. For quicker results, try to avoid heavy meals beforehand.
You should never take more than one Sildenafil tablet in 24 hours. Taking too much can increase your risk of side effects like headaches, dizziness, or a prolonged erection. If you’ve taken more than recommended, speak to a doctor straight away.
Sildenafil works for most men, but not everyone will get the same results. It may not work the first time, and some men might need to try it a few times before seeing the full effect. If it still doesn’t help, speak to your GP—they may suggest a different approach or dose.