Crossword clues for the word: ALLEGRA The word ALLEGRA has appeared as an answer to at least 9 crossword clues on different crossword puzzles. Crossword clues for ALLEGRA Showing 1 to 9 of 9 results Clue(s) """Laughing"" child in ""The Children's Hour.""" Antihistamine brand Chlor-Trimeton alternative Hay fever drug brand Hay fever treatment brand Name for a vivacious girl. Pollen season drug brand Popular decongestant Zyrtec competitor