The drug is available without a prescription and comes in two different strengths, including:
For adults and children over age 12, the Allegra-D 12 Hour dose is one tablet twice a day taken 12 hours apart. For people taking Allegra-D 24 Hour tablets, the recommended dosage is one tablet once a day.
(Click Allegra-D Dosage to find out what factors will affect your dose, as well as a list of important dosing tips and precautions.)