Important Instructions for Allegra-D


Prior to the Allegra-D's approval in the United States, one clinical study was conducted on 651 adults and adolescents. In this study, people taking the medication had improved allergy relief compared to the group of people not taking the medicine. This improvement was measured based on a symptom score that looked at changes in the following allergy symptoms:
  • Sneezing
  • Runny nose
  • Itchy nose and/or throat
  • Itchy, watery, and/or red eyes
  • Nasal congestion.

When and How Do I Take Allegra-D?

Some general considerations for when and how to take this medication include:
  • Allegra-D comes in tablet form. It is recommended that you take your dose on an empty stomach with a glass of water.
  • Taking it with food should be avoided.
  • Do not break, chew, or crush the tablets.
  • The medication should be taken at the same time each day to help maintain an even level of medicine in the blood. Do not take it more often than directed.
  • Allegra-D 12 Hour is usually taken twice a day. Allegra-D 24 Hour is usually taken once a day.
  • Occasionally, the inactive components of Allegra-D may be eliminated in the feces looking very similar to the tablet.  



The recommended dosage will vary depending on a number of factors, including:
  • The type of Allegra-D (12 hour or 24 hour)
  • Other medical conditions you may have
  • Other medication you may be currently taking.
As with any medication, do not adjust your dose unless your healthcare provider specifically instructs you to do so.
(Click Allegra-D Dosage for more information about dosing for Allegra-D in both adults and adolescents.)
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