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Taking Viagra could cut the risk of developing Alzheimer's, scientists say.

Researchers at the Cleveland Clinic in the US examined the medical data of 7million Americans in their 70s, 정품 시알리스 tracking them for six years.

Results showed adults who took sildenafil, the main ingredient in the little blue pill, were 69 per cent less likely to develop Alzheimer's compared to people who didn't use the medication. 

Sildenafil, also used to treat high blood pressure, 씨알리스정 appeared to perform better than two drugs currently being used in human trials against Alzheimer's. 

Lead researcher Dr Feixiong Cheng admitted clinical trials are needed to confirm whether the impotence drug can truly ward off the disease. 

But separate laboratory projects showed it can increase brain cell growth and stop harmful proteins building up in the brain. 

Sildenafil, which increases blood flow, is sold as Viagra to treat erectile dysfunction and as Revatio for 레비트라처방 patients with high blood pressure

The graph shows the proportion of sildenafil users (green line) not developing Alzheimer's, compared to two treatments being used against the disease in clinical trials (losartan and metformin), as well as anti-diabetic comparator drug glimepiride, which is not used as an Alzheimer's treatment. Over a six-year follow up, more people remained free of Alzheimer's who were taking sildenafil compared to those taking the other three drugs

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