Merv Silverman

Bottles of antiretroviral drug Truvada are shown at Jack's Pharmacy on November 23, 2010 in San Anselmo, California. (Justin Sullivan / Getty Images)

CDC Issues Guidelines For Prescribing Truvada To Prevent HIV

A promising drug shown to decrease the likelihood of transmitting HIV should only be prescribed to men at high risk who are closely monitored by a doctor, federal health officials said Friday.