Family doctor

DRUG NAME: Sildenafil citrate

USE: Erectile dysfunction (impotence)

This medicine is prescribed when a male cannot get, or keep, a hard erect penis suitable for sexual activity. Viagra works by relaxing the blood vessels and allowing blood to flow into the penis when sexually excited, thus allowing you to obtain an erection in a natural way.

Viagra will only work if you are sexually excited.

Caution:

Viagra should not be taken by patients on nitrate containing drugs - these are medications used in the treatment of angina.

Other conditions to beware of when taking Viagra:

• Heart conditions (chest pain)
• High blood pressure
• Diabetes
• Kidney or liver problems
• Eye disease
• Anatomical deformation of the penis
• Blood disorders (haemophilia)

Most patients who are generally healthy and active can safely take Viagra - it is important to discuss with your doctor prior to taking it.

Side effects:

Occasional:

• headache, dizziness
• flushing
• blurred vision
• indigestion
• diarrhoea

Rarely:

• Prolonged erection (seek urgent medical attention).

Interactions:

Alcohol, antihypertensives, ketoconazole, cimetidine, erythromycin all interfere with Viagra.

Treatment with nitrates enhances hypotensive effect (contraindicated - do not use).

Patient information:

• Follow the directions on the label of this medicine or as directed by your doctor
• Take your dose about one hour before you expect to have sex
• Tell your doctor if Viagra does not help you get an erection (or not long enough)
• The dose may need adjustment in some cases
• Alcohol: Avoid if possible
• Contact your doctor or seek medical help if side effects are severe or ongoing