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By Michelle Roberts
BBC News, health reporter
The drug works on blood vessels
Say the name Viagra and most buy viagra online people will automatically think of a drug to treat impotence.
But doctors are finding it is good buy viagra online at boosting parts of the body other than the penis, such as the blood vessels of the heart and lungs - as has been buy viagra online seen in the case of premature baby Lewis Goodfellow.
This is not altogether buy viagra online surprising given that Viagra was originally designed to lower buy viagra online blood pressure and treat angina.
Chance finding
It was during early testing buy viagra online that its developers noticed the drug aided buy viagra online the male erection - a curious and, as it buy viagra online turned out, very lucrative side effect.
Pfizer therefore decided to market it for buy viagra online erectile dysfunction, rather than as a heart drug, and buy viagra online after more safety tests Viagra was buy viagra online finally licensed as an impotence treatment in 1998.
It was originally looked at as a heart drug
Vicky Styman of the British Heart Foundation
Years later Viagra is turning full buy viagra online circle and doctors are re-exploring its use for treating circulatory problems buy viagra online involving the heart and lungs.
The drug, also buy viagra online known as sildenafil, does not directly buy viagra online give a man an erection. It works by boosting buy viagra online blood flow to the penis.
It does this by specifically buy viagra online blocking a particular enzyme called buy viagra online phosphodiesterase type 5 (PDE 5).
This action means the drug is also buy viagra online good at improving blood flow elsewhere in the body.
Vicky Styman of the British Heart Foundation buy viagra online explained: “It is a potent vasodilator, opening up the blood vessels and it was originally buy viagra online looked at as a heart drug.”
But there have been concerns about buy viagra online whether it is safe for men with heart disease buy viagra online on particular medications that work in the buy viagra online same way.
I suspect we will see a generation of drugs coming buy viagra online out from the sildenafil group which are actually buy viagra online designed for working on the heart
Ian Banks of the Men’s Health Forum
Doctors are told not to prescribe buy viagra online Viagra along with these angina drugs called buy viagra online nitrates as the mix could lower blood buy viagra online pressure to dangerous levels.
It appears to be safe in other buy viagra online heart patients, but Ms Styman added: “If you have a heart condition you should check with your doctor before taking Viagra.”
As erectile buy viagra online dysfunction and cardiovascular diseases buy viagra online have common risk factors, many of the patients who might buy viagra online benefit from Viagra also have cardiovascular diseases.
Ian Banks of the Men’s Health Forum said: “It was a very attractive buy viagra online drug for cardiac conditions buy viagra online and lowering blood pressure.
“Indeed, I’ve noticed buy viagra online that when I prescribe Viagra to patients with a heart buy viagra online condition it actually improves their heart buy viagra online condition as well as their erectile dysfunction.
“It does what it originally buy viagra online said on the tin. But Pfizer knew buy viagra online they were on to a winner with the buy viagra online erectile dysfunction line.
“But people are still buy viagra online interested in using it for other buy viagra online conditions and I suspect we will see a generation of drugs coming out from the sildenafil group which are actually designed for working on the heart buy viagra online because it is so effective.”
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