What is the Difference Between Allegra (Fexofenadine) and Zyrtec (Cetirizine)?

Allegra (fexofenadine) and Zyrtec (cetirizine) are both over-the-counter antihistamine medications used to treat allergy symptoms such as running nose, itchy eyes, and sneezing. They have some differences in terms of side effects and efficacy:

• Effectiveness: Both drugs are safe and effective, but studies show that Zyrtec's effects may last longer than Allegra's.
• Side Effects: Zyrtec is more likely to cause drowsiness compared to Allegra. However, both drugs can cause similar side effects, such as diarrhea, vomiting, and headache.
• Interactions: Drinking fruit juices can make Allegra less effective.

Both Allegra and Zyrtec are second-generation antihistamines, which were developed to provide allergy relief with fewer side effects compared to older antihistamines. Allegra has the lowest risk of sedation among all antihistamines, making it a preferred choice if sedation is a concern. However, Zyrtec is still much less sedating than older antihistamines like promethazine.

In summary, both Allegra and Zyrtec are effective in treating allergy symptoms, but Zyrtec is more likely to cause drowsiness and may last longer than Allegra. If sedation is a concern, Allegra might be the better choice.

Comparative Table: Allegra (Fexofenadine) vs Zyrtec (Cetirizine)

Allegra (fexofenadine) and Zyrtec (cetirizine) are both over-the-counter antihistamines used to treat allergy symptoms such as running nose, itchy eyes, and sneezing. They have some differences in terms of side effects, drug interactions, and warnings. Here is a comparison table of the differences between Allegra and Zyrtec:

Please note that it is essential to consult your doctor or pharmacist for specific dosage information and to ensure that the medication is appropriate for your condition and does not interact with other medications you may be taking.