Viagra 'could help jetlag'

Viagra could be used to help people flying eastwards recover from jetlag, according to new research.

A team of Argentine scientists found the drug helped hamsters recover up to 50% faster from forward shifts in their daily time cycles.

Injection of Viagra before the time shift meant the hamsters adjusted to the new time cycle faster, even when low doses of the drug, which did not cause penile erections, were used.