Viagra may aggravate sleep apnea

A study done in Brazil indicates a single dose of the erectile dysfunction drug Viagra may aggravate sleep apnea.

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<p><a href="http://www.physorg.com/news78416228.html">Viagra may aggravate sleep apnea</a></p> <p>A study done in Brazil indicates a single dose of the erectile dysfunction drug Viagra may aggravate sleep apnea. </p>