PRODUCTS Fast, Non-Drowsy 24 Hours Cold and AllergyX Allergy An allergy is the exaggerated response of the immune system to a foreign substance that is generally safe and poses no threat to the human body. Symptoms Relief. CLARITYN® For Allergies CLARITYN-D® For Allergies + Nasal Congestion CLARITYN® FOR KIDS For Kids' Allergies CLARICARE® For Natural Defence against Allergies FEATURED ARTICLES 200+ Allergens LEARN MORE Is it an Allergy or Cold or Flu? LEARN MORE Daily & Weekly Allergy Hacks LEARN MORE