Otrivin Oxy Fast Relief starts to work in 25 seconds on your blocked nose. It opens up the nasal passages and allows you to breathe normally. This is because Otrivin Oxy Fast Relief nasal solution is applied directly inside the nose. Otrivin Oxy Fast Relief continues to act up to 12 hours and thus provides quick and long-lasting relief. Otrivin Oxy Fast Relief nasal spray can also be used as nasal drops. The product is recommended for adults and children aged 12 years or more.