Blocked nose? Try Otrivin Nasal Spray Children. Otrivin is a nasal decongestant. It is effective in treating nasal congestion and provides quick relief from nasal discomfort due to colds, allergies and sinusitis. For use by children between 6 and 12 years of age. Prolonged use for more than 5 days is not recommended. Discard one month after opening.