What are Histallay Fexofenadine 120mg Tablets. Histallay contains fexofenadine hydrochloride, which is a non-drowsy antihistamine. How to take Histallay Fexofenadine 120mg Tablets. Histallay is used in adults and adolescents over 12 years of age to relieve the symptoms of allergic rhinitis (for example hayfever) such as sneezing, itchy, runny or blocked nose and itchy, red and watery eyes.
