Opexa 20 mg Tablet is an antihistamine medication containing Bilastine, manufactured by Renata Limited. It is used to relieve symptoms associated with allergic rhinitis (such as sneezing, nasal congestion, and itchy eyes) and urticaria (hives). Bilastine is a second-generation antihistamine known for its non-sedating properties, meaning it is less likely to cause drowsiness compared to first-generation antihistamines. The recommended dosage for adults and adolescents aged 12 years and older is one 20 mg tablet taken once daily on an empty stomach. Common side effects may include headache, dizziness, and fatigue. It is important to consult a healthcare professional before starting this medication, especially for individuals with liver or kidney impairments