More than half the Viagra prescribed to men is not working, says an expert in sexual medicine.
Dr Geoffrey Hackett, a consultant urologist, says men with erectile dysfunction could be “wasting hundreds of pounds on tablets” when their real issue is low testosterone.
He was speaking at the launch of new guidelines on the diagnosis and treatment of sexual disorders.
The guidelines are published in the journals Maturitas and Human Fertility.
Dr Hackett, sexual health specialist at Good Hope Hospital in Birmingham and former chairman of the British Society for Sexual Medicine, says the most common sexual problem men see their GP about is erectile dysfunction.
It affects 40% of men over 40 years old, and more than one in five men with erectile dysfunction have a testosterone deficiency.
