President Clinton breathed easier for a full day Monday after using Flonase prescription nasal spray, White House sources confirmed. 'Flonase did not make me drowsy or keep me awake like some antihistamines and decongestants,' the jubilant, decongested chief executive told reporters at a Rose Garden press conference. Clinton noted that Flonase is non-addictive and can be used by children as young as four. 'Side effects are generally mild and may include headache, nosebleed or sore throat; only your doctor or healthcare provider can determine if Flonase is right for you,' added Clinton before providing reporters with a toll-free number where additional information on the Glaxo Wellcome product can be obtained. 