Medi-First Sinus Relief 10 mg Strength Tablet 100 per Box - 2400 Count CaseSinus Relief Medi First 10 mg Strength Tablet 100 per Box Each tablet contains 10 milligrams of phenylephrine HCl. Phenylephrine HCl is one of the active ingredients in Sudafed PE a registered trademark of Kenvue. There are 100 individually wrapped cold tablets in a handy dispenser carton making it easy to share decongestant pain relief with co workers, neighbors, friends and family.