Histalix Syrup is a pharmaceutical product containing Diphenhydramine Hydrochloride, Ammonium Chloride, and Levomenthol. This 150ml expectorant syrup is manufactured by Wallace and is designed to help with respiratory symptoms. The active ingredients in this medication include Diphenhydramine Hydrochloride which acts as an antihistamine, Ammonium Chloride which helps as an expectorant, and Levomenthol which provides a soothing effect. As this is a medication, please consult with a healthcare professional before use and follow prescribed dosage instructions.