• Description
• Side Effects

About sildenafil (Viagra)

Sildenafil is a medicine used to treat erection problems (erectile dysfunction).If you have erection problems sildenafil works by temporarily increasing blood flow to your penis when you get sexually excited.

How does it work?

It usually takes 30 to 60 minutes for sildenafil to work for erectile dysfunction. You can take it up to 4 hours before you want to have sex.Taking sildenafil alone will not cause an erection. You need to be sexually excited for it to work.

Who can take sildenafil

Most men aged 18 and over can take sildenafil for erectile dysfunction.

If you're taking it for erection problems you're unlikely to get side effects as you're only taking it for a short time.

• Headaches
• Feeling sick (nausea)
• Flushing including hot flushes
• Indigestion
• Stuffy nose
• Feeling dizzy

Tell your doctor or pharmacist if the advice on how to cope does not help or the side effects get worse.

https://www.nhs.uk/medicines/sildenafil-viagra/
last updated: 13/11/2023

Description

About sildenafil (Viagra)

Sildenafil is a medicine used to treat erection problems (erectile dysfunction).If you have erection problems sildenafil works by temporarily increasing blood flow to your penis when you get sexually excited.

How does it work?

It usually takes 30 to 60 minutes for sildenafil to work for erectile dysfunction. You can take it up to 4 hours before you want to have sex.Taking sildenafil alone will not cause an erection. You need to be sexually excited for it to work.

Who can take sildenafil

Most men aged 18 and over can take sildenafil for erectile dysfunction.

Side Effects

If you're taking it for erection problems you're unlikely to get side effects as you're only taking it for a short time.

• Headaches
• Feeling sick (nausea)
• Flushing including hot flushes
• Indigestion
• Stuffy nose
• Feeling dizzy

Tell your doctor or pharmacist if the advice on how to cope does not help or the side effects get worse.

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