Exalin 10 mg Tablet is an antihistamine medication containing Rupatadine Fumarate, manufactured by OSL Pharma Limited. It is primarily used to treat allergic conditions such as seasonal and perennial allergic rhinitis (hay fever) and chronic idiopathic urticaria (hives). Rupatadine works by blocking histamine H1 receptors and antagonizing platelet-activating factor (PAF), both of which play roles in allergic reactions. This dual action helps alleviate symptoms like sneezing, runny nose, itching, and skin rashes. Exalin is a non-sedating antihistamine, meaning it is less likely to cause drowsiness compared to first-generation antihistamines. The recommended dosage for adults and adolescents over 12 years is 10 mg once daily, with or without food. It's important to follow the prescribed dosage and consult a healthcare provider before starting this medication, especially for individuals with existing health conditions or those taking other medications.