Allergies are the immune system's specific reaction to normally harmless substances, such as pollens, certain foods, or medicines. Allergies can either be seasonal or perennial. Seasonal allergies (such as hay fever) occur at specific times of the year, while perennial allergies can occur throughout the year.
Take Claritin as directed on the box. Most Claritin formulas work for 24 hours and only need to be taken once a day. Claritin D-12 can be taken twice daily.
Claritin has been studied thoroughly in clinical trials, in which the side effects of a group of people taking the drug are documented and compared to another group not taking the medicine.
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