Every couple of months or so, a natural substitute for Viagra invariably hits the headlines. Last month it was Watermelons, this month- Horny Goat Weed. So how does this work and is Viagra in danger of being replaced as the impotence treatment of choice any time soon.
Horny Goat Weed is a compound made from epimedium brevicornum - also known as Bishop’s Hat, Barrenwort, Fairy Wings, or Yin Yang Huo. According to folklore, horny goat weed’s reputed aphrodisiac qualities were discovered when a Chinese goat herder noticed increased sexual activity in his flock after they ingested the weed.
The reason it is in the news at the moment is thanks to a group of scientists from the University of Milan. Mario Dell’Agli, the lead researcher, said that experiments showed that icariin, a compound found inside the horny goat weed, appears to act by inhibiting the PDE-5 enzyme, a process which increases blood flow and facilitates the occurrence of an erection.
Sildenafil, the active ingredient in Viagra, also works by inhibiting PDE5. It is thought to be 80 times more effective than icariin. However, Mr Dell’Agli said that by producing a modified version of the horny goat weed molecule, a compound that “works as well as Viagra” can be produced.
“This could be the natural Viagra,” said Mr Dell’Agli. “We have synthesised a new molecule that one day may be able to replace Viagra.”
However, don’t hold your breath just yet. Mr Dell’Agli also said that further tests were necessary and that it would be at least 10 years before any drug was available to consumers.
Other herbal remedies for impotence include
Ginkgo Biloba - An all-round circulation booster. It is most widely known for its ability to improve memory, but it has been reported to also increase blood flow to the penis.
Cardamon- An aromatic spice used in cooking by many eastern cultures and many find it beneficial in dealing with impotence.
Ginseng - Well known as a sexual stimulant. Often used by men who have a loss of sex drive in Chinese culture.
Yohimbe – Taken from the bark of the west African yohimbe tree, it stimulates blood flow to the penis. Yohimbe has also been shown to increase libido and decrease the period between ejaculations. However, yohimbe is not recommended because it has a very narrow therapeutic index. There is a relatively small dosing range, below it the herb doesn’t work and above it the herb is toxic. Side effects of normal dosages include dizziness, anxiety, hyperstimulation, and nausea. As little as 40 mg a day can cause a severe drop in blood pressure, abdominal pain, fatigue, hallucinations, and paralysis.
Of course, as cheap, safe and available as natural medicines are, they do have one tiny drawback: they don’t actually do much. Viagra’s experimentally demonstrable effects probably ensure that the drug will have great staying power.