• Viagra is a pharmaceutical product used for treating erectile dysfunction (or impotence) in men.
• It is a blue, diamond-shaped pill, manufactured by the pharmaceutical company, Pfizer.
• Viagra pills are available in doses of 25-mg, 50-mg or 100-mg.
• In the United States, the availability of Viagra on the NHS is limited to men with certain causes of erectile dysfunction, particularly those of a physical nature. There is currently much debate over the issue, however, as many health experts claim it is not possible to discriminate between the different causes of impotence when making decisions about the availability of treatments. A review of government policy on this matter is expected soon.
• If you do not qualify for Viagra on the NHS, you can ask your GP to refer you to a private clinic or BUPA hospital where the provision of the drug is less restricted. It is not free, however, and only prescribed following a consultation.
• While Viagra is available from the USA, and can be purchased over the internet, health experts strenuously advise against using the drug without first undergoing a professional medical consultation.
  
  The Risks
  
  
• Some users have reported mild side-effects such as headaches, flushed skin, upset stomach and temporary changes in colour vision.
• Men who take nitroglycerin or other drugs containing nitrates used in the treatment of hypertension are advised not to take Viagra. This is because blood pressure could suddenly drop to unsafe levels, causing faintness or even blackout.
• Be aware that nitrates are also found in amyl nitrates or nitrite (poppers).
• It is not advisable to use Viagra if you suffer heart, kidney, liver or blood problems.
• The long term effects of Viagra misuse (taking too much or taking it even though you don't suffer from impotence) are still not fully understood.
• Like any drug, taking Viagra regularly over a long period of time could lead to psychological dependency problems. This could mean users find they are unable to achieve an erection without using Viagra.
  
  The Law:
  
  
• Viagra is legal in the United States, but free circulation is restricted on the NHS to those with severe erectile dysfunction.
  
  If you are planning on taking Viagra note the facts:
  
  
• Viagra is not an aphrodisiac. It doesn't increase sexual desire, or make a normal erection harder. It is a medical aid for helping men with erection difficulties.
• Viagra works by prolonging the effects of a naturally occurring chemical in the penis called cyclic GMP - which is responsible for erections.
• Doctors recommend impotence sufferers take Viagra one hour before sex.
• The intensity of the effects depends upon the dosage taken and the degree of sexual stimulation. Users have reported that the effects tend to kick in after 30 minutes, and can last up to 4 hours.
  
  Advice and support:
  
  
• Consult your GP, they can help you with any health problems and arrange counseling sessions to help you deal with erectile dysfunction.
  
  

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