Description
What is sildenafil and what is it used for?
Sildenafil is a medication used to treat erectile dysfunction (ED) in adult men. Erectile dysfunction is the inability to achieve or maintain an erection firm enough for sexual activity.
Sildenafil works by increasing blood flow to the penis during sexual stimulation, helping to support a natural erection. It does not cause an erection on its own and requires sexual arousal to be effective.
How sildenafil works
Sildenafil relaxes the blood vessels in the penis, allowing improved blood flow when you are sexually aroused. This makes it easier to get and keep an erection.
When to take sildenafil
Sildenafil is usually taken around one hour before sexual activity. Some men may find it works sooner, while large or fatty meals may delay its effects.
How to take sildenafil
- Take one tablet with water when needed.
- Do not take more than one dose in 24 hours.
- Alcohol may reduce effectiveness and increase side effects.
- If sildenafil does not work first time, it may still be effective on future occasions.
How long does sildenafil last?
Sildenafil can remain effective for up to 4 hours. This does not mean you will have a continuous erection, but that you may be able to achieve an erection more easily during this time with sexual stimulation.
Important safety information
- Do not take sildenafil if you use nitrate medicines for chest pain or recreational “poppers”, as this may cause a dangerous drop in blood pressure.
- Seek urgent medical help if you experience chest pain, sudden vision loss, or an erection lasting longer than 4 hours.
- Speak to a healthcare professional if erectile dysfunction is new, worsening, or linked to other health concerns.
Side effects of sildenafil
Most men tolerate sildenafil well, but side effects can occur.
Very common
- Headache
Common
- Dizziness
- Blurred vision or visual disturbances
- Facial flushing
- Blocked or runny nose
- Nausea or indigestion
If side effects are severe, persistent, or concerning, stop use and seek medical advice.
Frequently asked questions
Can I buy sildenafil without a prescription?
Certain strengths of sildenafil are available as a pharmacy medicine, meaning it can be supplied following a suitability assessment to ensure it is safe for you.
Will sildenafil work without sexual stimulation?
No. Sildenafil supports the physical process involved in getting an erection but does not work without sexual arousal.
What if sildenafil does not work for me?
If sildenafil is ineffective after several attempts, another dose strength or alternative treatment may be more suitable. A clinician can advise on the best option.
Can I take sildenafil with other erectile dysfunction treatments?
Sildenafil should not be taken alongside other erectile dysfunction medicines unless advised by a healthcare professional.
Is sildenafil suitable if I have heart problems?
Sildenafil may not be suitable for people with certain heart conditions or those taking specific heart medications. Medical advice should be sought before use.
Always read the patient information leaflet before use.
Side Effects
Some people may experience mild side effects when using this medication, including:
Headache, muscle pain, or back pain
Migraine
Flushing or redness of the face
Indigestion or upset stomach
Feeling sick or vomiting
Blocked or runny nose
Changes in vision or visual disturbances
If side effects persist or become troublesome, speak to a pharmacist or healthcare professional.
Information Leaflet
Information Leaflet
Always read the patient information leaflet before commencing treatment.
