Antonyms of asleep:
awake, live, sensible, alive, sensitive, aware, conscious, sleepless, aroused, astir, awakened, roused, up, wakened, reawakened, revived, wakeful, wide-awake, feeling, animated, dynamic, lively, thriving, vibrant, vital, vivacious, active, functioning, operative, running, animate, breathing, going, living, quick.
Examples of usage:
  1. General Austin's asleep in the next room!
    "The Cavalier", George Washington Cable.
  2. They be all asleep they be.
    "The Heath Hover Mystery", Bertram Mitford.
  3. Have I been asleep long?
    "The Lamplighter", Maria S. Cummins.