Viagra the answer to jetlag?

Here are two words you don’t often see together: Viagra and jetlag.
Researchers from the National University of Quilmes in Argentina has come up with the novel discovery that Viagra could alleviate jetlag symptoms in conjunction with light therapy – in hamsters at least.
According to the research, published in Proceedings of the National Academy of Sciences, hamsters injected with Viagra and also receiving light therapy, recovered up to 50% faster from forward shifts in their daily time cycles.The approximation of jetlag was achieved by shifting the light-dark cycle of hamsters six hours forwards by switching on lights six hours earlier than usual.
The researchers then noted the hamsters’ running wheel activity to assess when their body clocks had adjusted to the new time cycle. They hypothesised an ‘adjusted’ hamster would use the running wheel in the daytime, but stop running when the lights went out.
Injection of Viagra before the time shift meant the hamsters adjusted to the new time cycle fast, even when low doses of the drug were used.
Interestingly, Viagra only worked when the lights were switched on early and not late, the same as flying in an eastwards direction only.

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