Evastin 20mg Tablet contains Ebastine, an antihistamine used primarily to relieve symptoms associated with allergic conditions such as hay fever (allergic rhinitis) and chronic urticaria (hives). Ebastine works by selectively blocking peripheral H1 histamine receptors, thereby preventing the action of histamine, a substance in the body that causes allergic symptoms like sneezing, runny nose, itching, and watery eyes. This medication is non-sedating, meaning it is less likely to cause drowsiness compared to first-generation antihistamines, making it suitable for daytime use. Evastin 20mg is typically taken once daily, with or without food, and should be used as directed by a healthcare professional. It is important to follow the prescribed dosage to achieve optimal relief and minimize potential side effects, which may include headache, dry mouth, or mild gastrointestinal discomfort. Patients with liver impairment or those taking other medications should consult their doctor before use to avoid interactions. Evastin 20mg is not recommended for children under 12 years of age. Always inform your healthcare provider of your medical history and any other medications you are taking to ensure safe and effective treatment.