Klarihist 10Mg Tablet Contains Loratadine As The Active Ingredient. Loratadine Is A Second-Generation Antihistamine Used To Relieve Symptoms Of Allergic Reactions, Such As Hay Fever (Allergic Rhinitis), Hives (Urticaria), And Other Allergy-Related Conditions. It Works By Blocking Histamine Receptors In The Body, Which Are Responsible For Allergic Symptoms Like Sneezing, Itching, And Swelling. Side Effects: Common Side Effects: Headache, Dry Mouth, Drowsiness (Though Less Sedating Than First-Generation Antihistamines), And Stomach Discomfort. Serious Side Effects: Rare Cases Of Rapid Heart Rate, Dizziness, Or Allergic Reactions Such As Swelling Or Difficulty Breathing. Precautions: Liver/Kidney Issues: Use With Caution In Patients With Liver Or Kidney Dysfunction. Dose Adjustments May Be Required. Pregnancy And Breastfeeding: Use Under Medical Supervision During Pregnancy And Breastfeeding. Driving/Operating Machinery: Although Less Sedating Than Older Antihistamines, Drowsiness Can Occur. Caution Is Advised When Performing Tasks Requiring Alertness.