Relieves sinus congestion due to colds, hay fever and flu. There are 10 milligrams of phenylephrine HCl per tablet. Phenylephrine HCl is an active ingredient in Sudafed PE® – a registered trademark of Kenvue.. Tablets are coated so they dissolve slowly and effectively.. There are 500 one-tablet packets in a handy dispenser carton – making it easy to share decongestant with co-workers, neighbors, friends and family..