Histallay 120mg Fexofenadine 30 Tablets – 24hr Non-Drowsy Hayfever & Allergy Relief. ContainingFexofenadine Hydrochloride 120mg, Histallay is designed to help relieve symptoms associated withhay fever, pollen, dust and pet allergies, includingsneezing, runny nose, itchy or watery eyes and nasal irritation.