Histallay Hayfever & Allergy Relief Tablets, 30 Tablets, 120mg Fexofenadine, Antihistamine 24hr Relief, Acts Within 1hr, Relieves Hayfever, Pet, Dust and Mould Allergies. HAYFEVER & ALLERGY RELIEF: Histallay relieves you from Hayfever and Allergy symptoms such as itchy nose/throat, runny nose & sneezing, and itchy/watery eyes.