A 56-year-old member asked:
Allegra-d side effects?
1 doctor answer
Dr. Barbara Stark Baxter answered
41 years experience in Allergy and Immunology
Insomnia, jitters: Allegra d contains 2 drugs. Fexofenadine usually has few side effects, but can be drying to the nasal membranes and mouth, and can have side effects, so check further if you have some. The d portion, on the other hand, is sudafed, and it commonly causes jitters, insomnia, fast heart rate, nausea and headache. It can raise the blood pressure and cause arrhythmias.
Answered on Jul 10, 2018
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