What side effects may occur?
Start
Side effects cannot be anticipated. If any develop or change in intensity, tell your doctor as soon as possible. Only your doctor can determine if it is safe for you to continue taking Allegra.
Side effects of Allegra may include:
- Colds or flu, coughing, drowsiness, fatigue, fever, headache, indigestion, menstrual problems, nausea, pain including back or ear pain
- Side effects of Allegra-D may include:
- Abdominal pain, agitation, anxiety, back pain, dizziness, dry mouth, headache, heart palpitations, indigestion, insomnia, nausea, nervousness, respiratory tract infection, throat irritation