Nasal Congestion Relief. Pharmacist recommended. Phenylephrine HCI 1.0% nasal decongestant. Powerful relief you can use every 4 hrs. Cold + allergy. Non-drowsy. neosynephrine.com. Questions or comments? Call 1-855-565-5800 weekdays 9 am to 5 pm Est. Other information: Store at 20-25 degrees C (67-77 degrees F).