This application provides the healthcare profession with a method of quickly checking the compatibility of any two of the following intravenous drugs at the Y-site: Acetylcysteine. Adrenaline. Alfentanil. Aminophylline. Amiodarone. Aprotinin. Atracurium. Calcium Chloride. Calcium Gluconate. Ciprofloxacin. Cisatracurium. Clonidine.