A federal advisory panel voted unanimously yesterday that the first drug to enhance the sex drive of women should not be approved because of a lack of information about its long-term safety. Members of the committee said that the possible risks of the drug - a patch containing the hormone testosterone developed by Procter & Gamble - outweighed what some saw as only a modest benefit in increasing desire and the frequency of sex. "I am not devaluing the importance of this symptom and its treatment," said Dr. Steven Nissen, a cardiologist at the Cleveland Clinic and a panel member....