Fenox Nasal Spray Fenox Nasal Spray provides fast, effective relief against nasal congestion due to hayfever, allergies & head colds. Also relieves nasal congestion in head colds, catarrh & sinusitis. Ingredients Fenox Nasal Spray contains the active ingredient Phenylephrine Hydrochloride (0.5% w/v). The other ingredients are Cetrimide, Glycerin, Methylhydroxybenzoate & Purified Water. Directions Adults & elderly: 4-5 drops in each nostril night & morning & every 4 hours if needed. Children 6-12 years: 2 drops in each nostril night & morning & every 4 hours if necessary. Not recommended under 6 years except on medical advice.