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Allegra-d side effects?
1 doctor weighed in

Dr. Barbara Stark Baxter
Internal Medicine - Allergy & Immunology
In brief: 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.

In brief: 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.
Dr. Barbara Stark Baxter
Dr. Barbara Stark Baxter
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