The drug is available by prescription only 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.
If you have kidney disease, your healthcare provider may recommend a starting Allegra-D 12 Hour dosage of one tablet once a day. Allegra-D 24 Hour tablets should not be given to people with kidney disease.
(Click Allegra-D Dosage to find out what factors your healthcare provider will consider before recommending a particular Allegra-D product and for a list of important dosing tips and precautions.)