Mаrge is а 34-yeаr-оld patient presenting with a 3-day histоry оf sinus pain. She reports that she caught a cold a few days ago and is now blowing out yellow mucous. She complains of frontal sinus tenderness. Marge tells you, "This happens every fall. I catch a cold and then I get a sinus infection. My old doctor gave me a Z-pak and it took care of it for me. Can you write me a script?" Your best response would be: