The impotence pill Viagra may be a useful treatment against Alzheimer’s disease, say US researchers who have been studying its effects in the brain. Tests in cells suggest the drug targets some of the proteins that accumulate in this type of dementia.

The Cleveland team also analysed a database of 7m patients and found men who were on the drug had a lower risk of Alzheimer’s. Results showed that high doses of the drug (larger than a person would normally take) increased brain cell growth and reduced protein accumulation in lab studies of human tissue.
Source : BBC