Allergies Home > Allegra Side Effects
Most people do not have problems with Allegra, and when they do, the effects are usually minor. Some of the most common side effects are headache, coughing, and respiratory tract infection. Rare side effects of Allegra -- such as sleep problems, allergic reaction, and a rash -- are also possible, but these occur in less than 2 percent of people who take this medication.
An Introduction to Allegra Side EffectsAs with any medicine, side effects are possible with Allegra® (fexofenadine hydrochloride); however, not everyone who takes the drug will have problems. In fact, most people tolerate it well. If side effects do occur, in most cases, they are minor, meaning they require no treatment or are easily treated by you or your healthcare provider.
Common Side Effects of Allegra
- Vomiting -- in up to 12 percent of people
- Headache -- up to 10.3 percent (see Allegra and Migraines)
- Coughing -- up to 3.8 percent
- Diarrhea -- up to 3.7 percent
- Respiratory tract infection, such as the common cold or flu -- up to 2.9 percent
- Drowsiness or fatigue -- up to 2.8 percent
- Back pain -- up to 2.5 percent (see Allegra and Back Pain)
- Middle ear infection (otitis media) -- up to 2.4 percent
- Fever -- up to 2.4 percent
- Dizziness -- up to 2.1 percent
- Drowsiness -- up to 1.3 percent
- Indigestion -- up to 2.1 percent
- Arm or leg pain -- up to 2.1 percent.